CWE-367

Time-of-check Time-of-use (TOCTOU) Race Condition

The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.

CVE-2022-23563 (GCVE-0-2022-23563)

Vulnerability from cvelistv5 – Published: 2022-02-04 22:32 – Updated: 2025-04-23 19:07
VLAI
Title
Insecure temporary file in Tensorflow
Summary
Tensorflow is an Open Source Machine Learning Framework. In multiple places, TensorFlow uses `tempfile.mktemp` to create temporary files. While this is acceptable in testing, in utilities and libraries it is dangerous as a different process can create the file between the check for the filename in `mktemp` and the actual creation of the file by a subsequent operation (a TOC/TOU type of weakness). In several instances, TensorFlow was supposed to actually create a temporary directory instead of a file. This logic bug is hidden away by the `mktemp` function usage. We have patched the issue in several commits, replacing `mktemp` with the safer `mkstemp`/`mkdtemp` functions, according to the usage pattern. Users are advised to upgrade as soon as possible.
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
Impacted products
Vendor Product Version
tensorflow tensorflow Affected: >= 2.7.0, < 2.7.1
Affected: >= 2.6.0, < 2.6.3
Affected: < 2.5.3
Create a notification for this product.
Show details on NVD website

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CVE-2022-23651 (GCVE-0-2022-23651)

Vulnerability from cvelistv5 – Published: 2022-02-23 22:50 – Updated: 2025-04-23 19:00
VLAI
Title
b2-sdk-python TOCTOU application key disclosure
Summary
b2-sdk-python is a python library to access cloud storage provided by backblaze. Linux and Mac releases of the SDK version 1.14.0 and below contain a key disclosure vulnerability that, in certain conditions, can be exploited by local attackers through a time-of-check-time-of-use (TOCTOU) race condition. SDK users of the SqliteAccountInfo format are vulnerable while users of the InMemoryAccountInfo format are safe. The SqliteAccountInfo saves API keys (and bucket name-to-id mapping) in a local database file ($XDG_CONFIG_HOME/b2/account_info, ~/.b2_account_info or a user-defined path). When first created, the file is world readable and is (typically a few milliseconds) later altered to be private to the user. If the directory containing the file is readable by a local attacker then during the brief period between file creation and permission modification, a local attacker can race to open the file and maintain a handle to it. This allows the local attacker to read the contents after the file after the sensitive information has been saved to it. Consumers of this SDK who rely on it to save data using SqliteAccountInfo class should upgrade to the latest version of the SDK. Those who believe a local user might have opened a handle using this race condition, should remove the affected database files and regenerate all application keys. Users should upgrade to b2-sdk-python 1.14.1 or later.
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
Impacted products
Vendor Product Version
Backblaze b2-sdk-python Affected: < 1.14.1
Create a notification for this product.
Show details on NVD website

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CVE-2022-23653 (GCVE-0-2022-23653)

Vulnerability from cvelistv5 – Published: 2022-02-23 23:05 – Updated: 2025-04-23 19:00
VLAI
Title
B2 Command Line Tool TOCTOU application key disclosure
Summary
B2 Command Line Tool is the official command line tool for the backblaze cloud storage service. Linux and Mac releases of the B2 command-line tool version 3.2.0 and below contain a key disclosure vulnerability that, in certain conditions, can be exploited by local attackers through a time-of-check-time-of-use (TOCTOU) race condition. The command line tool saves API keys (and bucket name-to-id mapping) in a local database file (`$XDG_CONFIG_HOME/b2/account_info`, `~/.b2_account_info` or a user-defined path) when `b2 authorize-account` is first run. This happens regardless of whether a valid key is provided or not. When first created, the file is world readable and is (typically a few milliseconds) later altered to be private to the user. If the directory is readable by a local attacker and the user did not yet run `b2 authorize-account` then during the brief period between file creation and permission modification, a local attacker can race to open the file and maintain a handle to it. This allows the local attacker to read the contents after the file after the sensitive information has been saved to it. Users that have not yet run `b2 authorize-account` should upgrade to B2 Command-Line Tool v3.2.1 before running it. Users that have run `b2 authorize-account` are safe if at the time of the file creation no other local users had read access to the local configuration file. Users that have run `b2 authorize-account` where the designated path could be opened by another local user should upgrade to B2 Command-Line Tool v3.2.1 and remove the database and regenerate all application keys. Note that `b2 clear-account` does not remove the database file and it should not be used to ensure that all open handles to the file are invalidated. If B2 Command-Line Tool cannot be upgraded to v3.2.1 due to a dependency conflict, a binary release can be used instead. Alternatively a new version could be installed within a virtualenv, or the permissions can be changed to prevent local users from opening the database file.
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
Impacted products
Show details on NVD website

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CVE-2022-23826 (GCVE-0-2022-23826)

Vulnerability from cvelistv5 – Published: 2026-05-15 02:30 – Updated: 2026-05-15 13:20
VLAI
Summary
A TOCTOU (Time-Of-Check to Time-Of-Use) in the graphics interface may allow an attacker to load registers repeatedly creating a race condition potentially leading to a loss of integrity.
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
AMD
Impacted products
Vendor Product Version
AMD AMD Ryzen™ 3000 Series Mobile Processors with Radeon™ Graphics Unaffected: PicassoPI-FP5 1.0.0.E
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AMD AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics Unaffected: PicassoPI-FP5 1.0.0.E
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AMD AMD Athlon™ 3000 Series Desktop Processors with Radeon™ Graphics Unaffected: ComboAM4v2 PI 1.2.0.8
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AMD AMD Ryzen™ Embedded R1000 Series Processors Unaffected: EmbeddedPI-FP5_1.2.0.A
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AMD AMD Ryzen™ Embedded R2000 Series Processors Unaffected: EmbeddedR2KPI-FP5_1.0.0.2
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AMD AMD Ryzen™ Embedded V1000 Series Processors (formerly codenamed "Raven Ridge") Unaffected: EmbeddedPI-FP5_1.2.0.A
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AMD AMD Ryzen™ Embedded V1000 Series Processors (formerly codenamed "Picasso") Unaffected: 120A
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AMD AMD Radeon™ RX 5000 Series Graphics Products Unaffected: AMD Software: Adrenalin Edition 25.5.1 (25.10.01.09)
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AMD AMD Radeon™ PRO W5000 Series Graphics Products Unaffected: AMD Software: PRO Edition 25.Q2 (25.10.10)
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AMD AMD Radeon™ RX 6000 Series Graphics Products Unaffected: AMD Software: Adrenalin Edition 25.5.1 (25.10.01.09)
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AMD AMD Radeon™ VII Unaffected: AMD Software: Adrenalin Edition 25.5.1 (23.19.23.01 pre-RDNA)
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AMD AMD Radeon™ RX Vega Series Graphics Cards Unaffected: AMD Software: Adrenalin Edition 25.5.1 (23.19.23.01 pre-RDNA)
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AMD AMD Radeon™ PRO W6000 Series Graphics Product Unaffected: AMD Software: PRO Edition 25.Q2 (25.10.10)
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AMD AMD Radeon™ PRO W6000 Series Graphics Products Unaffected: AMD Software: PRO Edition 25.Q2 (25.10.10)
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AMD AMD Radeon™ PRO WX 8000/9000 Series Graphics Cards Unaffected: AMD Software: PRO Edition 25.Q2 (23.19.23.01 pre-RDNA)
Create a notification for this product.
AMD AMD Radeon™ PRO VII Unaffected: AMD Software: PRO Edition 25.Q2 (23.19.23.01 pre-RDNA)
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AMD AMD Instinct™ MI250 Unaffected: ROCm 6.4.2
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AMD AMD Instinct™ MI210 Unaffected: ROCm 6.4.2
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AMD AMD Radeon™ Instinct™ MI25 Unaffected: Contact your AMD Customer Engineering representative
Create a notification for this product.
AMD AMD Radeon™ PRO V520 Unaffected: Contact your AMD Customer Engineering representative
Create a notification for this product.
AMD AMD Radeon™ PRO V620 Unaffected: Contact your AMD Customer Engineering representative
Create a notification for this product.
Date Public
2026-05-15 02:29
Show details on NVD website

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CVE-2022-24413 (GCVE-0-2022-24413)

Vulnerability from cvelistv5 – Published: 2022-04-12 17:50 – Updated: 2024-09-17 04:03
VLAI
Summary
Dell PowerScale OneFS, versions 8.2.2-9.3.x, contain a time-of-check-to-time-of-use vulnerability. A local user with access to the filesystem could potentially exploit this vulnerability, leading to data loss.
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
Impacted products
Vendor Product Version
Dell PowerScale OneFS Affected: 8.2.2-9.3.x
Create a notification for this product.
Date Public
2022-03-03 00:00
Show details on NVD website

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CVE-2022-26859 (GCVE-0-2022-26859)

Vulnerability from cvelistv5 – Published: 2022-09-06 20:15 – Updated: 2026-05-27 13:02
VLAI
Summary
Dell BIOS contains a race condition vulnerability. A local attacker could exploit this vulnerability by sending malicious input via SMI in order to bypass security checks during SMM.
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
Impacted products
Vendor Product Version
Dell CPG BIOS Affected: unspecified , < All (custom)
Create a notification for this product.
Date Public
2022-08-04 00:00
Show details on NVD website

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CVE-2022-27834 (GCVE-0-2022-27834)

Vulnerability from cvelistv5 – Published: 2022-04-11 19:37 – Updated: 2024-08-03 05:41
VLAI
Summary
Use after free vulnerability in dsp_context_unload_graph function of DSP driver prior to SMR Apr-2022 Release 1 allows attackers to perform malicious actions.
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
Impacted products
Vendor Product Version
Samsung Mobile Samsung Mobile Devices Affected: Q(10), R(11), S(12) devices with Exynos 2100, 9830, 980 chipsets , < SMR Apr-2022 Release 1 (custom)
Create a notification for this product.
Show details on NVD website

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CVE-2022-29800 (GCVE-0-2022-29800)

Vulnerability from cvelistv5 – Published: 2022-09-21 18:21 – Updated: 2025-05-28 13:53
VLAI
Summary
A time-of-check-time-of-use (TOCTOU) race condition vulnerability was found in networkd-dispatcher. This flaw exists because there is a certain time between the scripts being discovered and them being run. An attacker can abuse this vulnerability to replace scripts that networkd-dispatcher believes to be owned by root with ones that are not.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a networkd-dispatcher Affected: uknown
Show details on NVD website

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CVE-2022-3093 (GCVE-0-2022-3093)

Vulnerability from cvelistv5 – Published: 2023-03-29 00:00 – Updated: 2025-02-14 16:35
VLAI
Summary
This vulnerability allows physical attackers to execute arbitrary code on affected Tesla vehicles. Authentication is not required to exploit this vulnerability. The specific flaw exists within the ice_updater update mechanism. The issue results from the lack of proper validation of user-supplied firmware. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-17463.
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
zdi
Impacted products
Vendor Product Version
Tesla Model 3 Affected: Model 3
Create a notification for this product.
Credits
@Jedar_LZ
Show details on NVD website

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CVE-2022-33257 (GCVE-0-2022-33257)

Vulnerability from cvelistv5 – Published: 2023-03-07 04:43 – Updated: 2024-08-03 08:01
VLAI
Title
Time-of-check time-of-use race condition in Core
Summary
Memory corruption in Core due to time-of-check time-of-use race condition during dump collection in trust zone.
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
Impacted products
Vendor Product Version
Qualcomm, Inc. Snapdragon Affected: AQT1000
Affected: AR8031
Affected: AR8035
Affected: CSRA6620
Affected: CSRA6640
Affected: MDM9205
Affected: QAM8295P
Affected: QCA4004
Affected: QCA6174A
Affected: QCA6310
Affected: QCA6335
Affected: QCA6390
Affected: QCA6391
Affected: QCA6420
Affected: QCA6421
Affected: QCA6426
Affected: QCA6430
Affected: QCA6431
Affected: QCA6436
Affected: QCA6564A
Affected: QCA6564AU
Affected: QCA6574
Affected: QCA6574A
Affected: QCA6574AU
Affected: QCA6595
Affected: QCA6595AU
Affected: QCA6696
Affected: QCA6698AQ
Affected: QCA8081
Affected: QCA8337
Affected: QCA9377
Affected: QCA9984
Affected: QCC5100
Affected: QCM2290
Affected: QCM4290
Affected: QCM4325
Affected: QCM6490
Affected: QCN6024
Affected: QCN7606
Affected: QCN9011
Affected: QCN9012
Affected: QCN9024
Affected: QCS2290
Affected: QCS405
Affected: QCS4290
Affected: QCS603
Affected: QCS605
Affected: QCS6490
Affected: QRB5165
Affected: QRB5165M
Affected: QRB5165N
Affected: QSM8250
Affected: QSM8350
Affected: SA6145P
Affected: SA6155
Affected: SA6155P
Affected: SA8150P
Affected: SA8155
Affected: SA8155P
Affected: SA8295P
Affected: SA8540P
Affected: SA9000P
Affected: SD 675
Affected: SD 8 Gen1 5G
Affected: SD 8CX
Affected: SD 8cx Gen2
Affected: SD 8cx Gen3
Affected: SD460
Affected: SD480
Affected: SD662
Affected: SD665
Affected: SD670
Affected: SD675
Affected: SD678
Affected: SD680
Affected: SD690 5G
Affected: SD695
Affected: SD750G
Affected: SD765
Affected: SD765G
Affected: SD768G
Affected: SD778G
Affected: SD780G
Affected: SD845
Affected: SD850
Affected: SD855
Affected: SD865 5G
Affected: SD870
Affected: SD888
Affected: SD888 5G
Affected: SDX24
Affected: SDX50M
Affected: SDX55
Affected: SDX55M
Affected: SDX57M
Affected: SDX65
Affected: SDX70M
Affected: SDXR2 5G
Affected: SG4150P
Affected: SM4125
Affected: SM7250P
Affected: SM7315
Affected: SM7325P
Affected: Snapdragon 4 Gen 1
Affected: SSG2115P
Affected: SSG2125P
Affected: SW5100
Affected: SW5100P
Affected: SXR1230P
Affected: SXR2150P
Affected: WCD9306
Affected: WCD9326
Affected: WCD9335
Affected: WCD9340
Affected: WCD9341
Affected: WCD9370
Affected: WCD9375
Affected: WCD9380
Affected: WCD9385
Affected: WCN3910
Affected: WCN3950
Affected: WCN3980
Affected: WCN3988
Affected: WCN3990
Affected: WCN3991
Affected: WCN3998
Affected: WCN3999
Affected: WCN6740
Affected: WCN6750
Affected: WCN6850
Affected: WCN6851
Affected: WCN6855
Affected: WCN6856
Affected: WCN7850
Affected: WCN7851
Affected: WSA8810
Affected: WSA8815
Affected: WSA8830
Affected: WSA8832
Affected: WSA8835
Create a notification for this product.
Show details on NVD website

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              "version": "QCA9984"
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              "status": "affected",
              "version": "QCC5100"
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            {
              "status": "affected",
              "version": "QCM2290"
            },
            {
              "status": "affected",
              "version": "QCM4290"
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              "status": "affected",
              "version": "QCM4325"
            },
            {
              "status": "affected",
              "version": "QCM6490"
            },
            {
              "status": "affected",
              "version": "QCN6024"
            },
            {
              "status": "affected",
              "version": "QCN7606"
            },
            {
              "status": "affected",
              "version": "QCN9011"
            },
            {
              "status": "affected",
              "version": "QCN9012"
            },
            {
              "status": "affected",
              "version": "QCN9024"
            },
            {
              "status": "affected",
              "version": "QCS2290"
            },
            {
              "status": "affected",
              "version": "QCS405"
            },
            {
              "status": "affected",
              "version": "QCS4290"
            },
            {
              "status": "affected",
              "version": "QCS603"
            },
            {
              "status": "affected",
              "version": "QCS605"
            },
            {
              "status": "affected",
              "version": "QCS6490"
            },
            {
              "status": "affected",
              "version": "QRB5165"
            },
            {
              "status": "affected",
              "version": "QRB5165M"
            },
            {
              "status": "affected",
              "version": "QRB5165N"
            },
            {
              "status": "affected",
              "version": "QSM8250"
            },
            {
              "status": "affected",
              "version": "QSM8350"
            },
            {
              "status": "affected",
              "version": "SA6145P"
            },
            {
              "status": "affected",
              "version": "SA6155"
            },
            {
              "status": "affected",
              "version": "SA6155P"
            },
            {
              "status": "affected",
              "version": "SA8150P"
            },
            {
              "status": "affected",
              "version": "SA8155"
            },
            {
              "status": "affected",
              "version": "SA8155P"
            },
            {
              "status": "affected",
              "version": "SA8295P"
            },
            {
              "status": "affected",
              "version": "SA8540P"
            },
            {
              "status": "affected",
              "version": "SA9000P"
            },
            {
              "status": "affected",
              "version": "SD 675"
            },
            {
              "status": "affected",
              "version": "SD 8 Gen1 5G"
            },
            {
              "status": "affected",
              "version": "SD 8CX"
            },
            {
              "status": "affected",
              "version": "SD 8cx Gen2"
            },
            {
              "status": "affected",
              "version": "SD 8cx Gen3"
            },
            {
              "status": "affected",
              "version": "SD460"
            },
            {
              "status": "affected",
              "version": "SD480"
            },
            {
              "status": "affected",
              "version": "SD662"
            },
            {
              "status": "affected",
              "version": "SD665"
            },
            {
              "status": "affected",
              "version": "SD670"
            },
            {
              "status": "affected",
              "version": "SD675"
            },
            {
              "status": "affected",
              "version": "SD678"
            },
            {
              "status": "affected",
              "version": "SD680"
            },
            {
              "status": "affected",
              "version": "SD690 5G"
            },
            {
              "status": "affected",
              "version": "SD695"
            },
            {
              "status": "affected",
              "version": "SD750G"
            },
            {
              "status": "affected",
              "version": "SD765"
            },
            {
              "status": "affected",
              "version": "SD765G"
            },
            {
              "status": "affected",
              "version": "SD768G"
            },
            {
              "status": "affected",
              "version": "SD778G"
            },
            {
              "status": "affected",
              "version": "SD780G"
            },
            {
              "status": "affected",
              "version": "SD845"
            },
            {
              "status": "affected",
              "version": "SD850"
            },
            {
              "status": "affected",
              "version": "SD855"
            },
            {
              "status": "affected",
              "version": "SD865 5G"
            },
            {
              "status": "affected",
              "version": "SD870"
            },
            {
              "status": "affected",
              "version": "SD888"
            },
            {
              "status": "affected",
              "version": "SD888 5G"
            },
            {
              "status": "affected",
              "version": "SDX24"
            },
            {
              "status": "affected",
              "version": "SDX50M"
            },
            {
              "status": "affected",
              "version": "SDX55"
            },
            {
              "status": "affected",
              "version": "SDX55M"
            },
            {
              "status": "affected",
              "version": "SDX57M"
            },
            {
              "status": "affected",
              "version": "SDX65"
            },
            {
              "status": "affected",
              "version": "SDX70M"
            },
            {
              "status": "affected",
              "version": "SDXR2 5G"
            },
            {
              "status": "affected",
              "version": "SG4150P"
            },
            {
              "status": "affected",
              "version": "SM4125"
            },
            {
              "status": "affected",
              "version": "SM7250P"
            },
            {
              "status": "affected",
              "version": "SM7315"
            },
            {
              "status": "affected",
              "version": "SM7325P"
            },
            {
              "status": "affected",
              "version": "Snapdragon 4 Gen 1"
            },
            {
              "status": "affected",
              "version": "SSG2115P"
            },
            {
              "status": "affected",
              "version": "SSG2125P"
            },
            {
              "status": "affected",
              "version": "SW5100"
            },
            {
              "status": "affected",
              "version": "SW5100P"
            },
            {
              "status": "affected",
              "version": "SXR1230P"
            },
            {
              "status": "affected",
              "version": "SXR2150P"
            },
            {
              "status": "affected",
              "version": "WCD9306"
            },
            {
              "status": "affected",
              "version": "WCD9326"
            },
            {
              "status": "affected",
              "version": "WCD9335"
            },
            {
              "status": "affected",
              "version": "WCD9340"
            },
            {
              "status": "affected",
              "version": "WCD9341"
            },
            {
              "status": "affected",
              "version": "WCD9370"
            },
            {
              "status": "affected",
              "version": "WCD9375"
            },
            {
              "status": "affected",
              "version": "WCD9380"
            },
            {
              "status": "affected",
              "version": "WCD9385"
            },
            {
              "status": "affected",
              "version": "WCN3910"
            },
            {
              "status": "affected",
              "version": "WCN3950"
            },
            {
              "status": "affected",
              "version": "WCN3980"
            },
            {
              "status": "affected",
              "version": "WCN3988"
            },
            {
              "status": "affected",
              "version": "WCN3990"
            },
            {
              "status": "affected",
              "version": "WCN3991"
            },
            {
              "status": "affected",
              "version": "WCN3998"
            },
            {
              "status": "affected",
              "version": "WCN3999"
            },
            {
              "status": "affected",
              "version": "WCN6740"
            },
            {
              "status": "affected",
              "version": "WCN6750"
            },
            {
              "status": "affected",
              "version": "WCN6850"
            },
            {
              "status": "affected",
              "version": "WCN6851"
            },
            {
              "status": "affected",
              "version": "WCN6855"
            },
            {
              "status": "affected",
              "version": "WCN6856"
            },
            {
              "status": "affected",
              "version": "WCN7850"
            },
            {
              "status": "affected",
              "version": "WCN7851"
            },
            {
              "status": "affected",
              "version": "WSA8810"
            },
            {
              "status": "affected",
              "version": "WSA8815"
            },
            {
              "status": "affected",
              "version": "WSA8830"
            },
            {
              "status": "affected",
              "version": "WSA8832"
            },
            {
              "status": "affected",
              "version": "WSA8835"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Memory corruption in Core due to time-of-check time-of-use race condition during dump collection in trust zone."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 9.3,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-367",
              "description": "CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-04-12T16:30:45.818Z",
        "orgId": "2cfc7d3e-20d3-47ac-8db7-1b7285aff15f",
        "shortName": "qualcomm"
      },
      "references": [
        {
          "url": "https://www.qualcomm.com/company/product-security/bulletins/march-2023-bulletin"
        }
      ],
      "title": "Time-of-check time-of-use race condition in Core"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "2cfc7d3e-20d3-47ac-8db7-1b7285aff15f",
    "assignerShortName": "qualcomm",
    "cveId": "CVE-2022-33257",
    "datePublished": "2023-03-07T04:43:34.866Z",
    "dateReserved": "2022-06-14T10:44:39.590Z",
    "dateUpdated": "2024-08-03T08:01:20.420Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Mitigation

Phase: Implementation

Description:

  • The most basic advice for TOCTOU vulnerabilities is to not perform a check before the use. This does not resolve the underlying issue of the execution of a function on a resource whose state and identity cannot be assured, but it does help to limit the false sense of security given by the check.
Mitigation

Phase: Implementation

Description:

  • When the file being altered is owned by the current user and group, set the effective gid and uid to that of the current user and group when executing this statement.
Mitigation

Phase: Architecture and Design

Description:

  • Limit the interleaving of operations on files from multiple processes.
Mitigation

Phases: Implementation, Architecture and Design

Description:

  • If you cannot perform operations atomically and you must share access to the resource between multiple processes or threads, then try to limit the amount of time (CPU cycles) between the check and use of the resource. This will not fix the problem, but it could make it more difficult for an attack to succeed.
Mitigation

Phase: Implementation

Description:

  • Recheck the resource after the use call to verify that the action was taken appropriately.
Mitigation

Phase: Architecture and Design

Description:

  • Ensure that some environmental locking mechanism can be used to protect resources effectively.
Mitigation

Phase: Implementation

Description:

  • Ensure that locking occurs before the check, as opposed to afterwards, such that the resource, as checked, is the same as it is when in use.
CAPEC-27: Leveraging Race Conditions via Symbolic Links

This attack leverages the use of symbolic links (Symlinks) in order to write to sensitive files. An attacker can create a Symlink link to a target file not otherwise accessible to them. When the privileged program tries to create a temporary file with the same name as the Symlink link, it will actually write to the target file pointed to by the attackers' Symlink link. If the attacker can insert malicious content in the temporary file they will be writing to the sensitive file by using the Symlink. The race occurs because the system checks if the temporary file exists, then creates the file. The attacker would typically create the Symlink during the interval between the check and the creation of the temporary file.

CAPEC-29: Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions

This attack targets a race condition occurring between the time of check (state) for a resource and the time of use of a resource. A typical example is file access. The adversary can leverage a file access race condition by "running the race", meaning that they would modify the resource between the first time the target program accesses the file and the time the target program uses the file. During that period of time, the adversary could replace or modify the file, causing the application to behave unexpectedly.

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