Common Weakness Enumeration
CWE-476
AllowedNULL Pointer Dereference
Abstraction: Base · Status: Stable
The product dereferences a pointer that it expects to be valid but is NULL.
6310 vulnerabilities reference this CWE, most recent first.
CVE-2021-33714 (GCVE-0-2021-33714)
Vulnerability from cvelistv5 – Published: 2021-07-13 11:03 – Updated: 2024-08-03 23:58
VLAI
EPSS
VEX
Summary
A vulnerability has been identified in JT Utilities (All versions < V13.0.2.0). When parsing specially crafted JT files, a missing check for the validity of an iterator leads to NULL pointer deference condition, causing the application to crash. An attacker could leverage this vulnerability to cause a Denial-of-Service condition in the application.
Severity
No CVSS data available.
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://cert-portal.siemens.com/productcert/pdf/s… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Siemens | JT Utilities |
Affected:
All versions < V13.0.2.0
|
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CVE-2021-33630 (GCVE-0-2021-33630)
Vulnerability from cvelistv5 – Published: 2024-01-18 15:00 – Updated: 2025-05-07 20:14
VLAI
EPSS
VEX
Title
NULL-ptr-deref in network sched
Summary
NULL Pointer Dereference vulnerability in openEuler kernel on Linux (network modules) allows Pointer Manipulation. This vulnerability is associated with program files net/sched/sch_cbs.C.
This issue affects openEuler kernel: from 4.19.90 before 4.19.90-2401.3.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
15 references
Impacted products
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CVE-2021-33572 (GCVE-0-2021-33572)
Vulnerability from cvelistv5 – Published: 2021-06-21 11:10 – Updated: 2024-09-16 23:52
VLAI
EPSS
VEX
Title
Denial-of-Service (DoS) Vulnerability
Summary
A Denial-of-Service (DoS) vulnerability was discovered in F-Secure Linux Security whereby the FSAVD component used in certain F-Secure products can crash while scanning larger packages/fuzzed files. The exploit can be triggered remotely by an attacker. A successful attack will result in Denial-of-Service (DoS) of the Anti-Virus engine.
Severity
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.f-secure.com/en/business/programs/vul… | x_refsource_MISC |
| https://www.f-secure.com/en/business/support-and-… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| F-Secure | F-Secure Products |
Affected:
All Version
|
Date Public
2021-06-03 00:00
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CVE-2021-32987 (GCVE-0-2021-32987)
Vulnerability from cvelistv5 – Published: 2021-09-23 13:33 – Updated: 2024-09-16 23:40
VLAI
EPSS
VEX
Title
AVEVA SuiteLink Server Null Pointer Dereference
Summary
Null pointer dereference in SuiteLink server while processing command 0x0b
Severity
7.5 (High)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.aveva.com/content/dam/aveva/documents… | x_refsource_CONFIRM |
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
| AVEVA Software, LLC | AVEVA System Platform 2020 |
Affected:
unspecified , ≤ R2 P01
(custom)
|
|
| AVEVA Software, LLC | AVEVA InTouch 2020 |
Affected:
unspecified , ≤ R2 P01
(custom)
|
|
| AVEVA Software, LLC | AVEVA Historian 2020 |
Affected:
unspecified , ≤ R2 P01
(custom)
|
|
| AVEVA Software, LLC | AVEVA Communication Drivers Pack 2020 |
Affected:
unspecified , ≤ R2
(custom)
|
|
| AVEVA Software, LLC | AVEVA Batch Management 2020 |
Affected:
unspecified , ≤ 2020
(custom)
|
|
| AVEVA Software, LLC | AVEVA MES 2014 |
Affected:
unspecified , ≤ R2
(custom)
|
Date Public
2021-08-19 00:00
Credits
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CVE-2021-32979 (GCVE-0-2021-32979)
Vulnerability from cvelistv5 – Published: 2021-09-23 13:32 – Updated: 2024-09-16 20:51
VLAI
EPSS
VEX
Title
AVEVA SuiteLink Server Null Pointer Dereference
Summary
Null pointer dereference in SuiteLink server while processing commands 0x04/0x0a
Severity
7.5 (High)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
1 reference
| URL | Tags |
|---|---|
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Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
| AVEVA Software, LLC | AVEVA System Platform 2020 |
Affected:
unspecified , ≤ R2 P01
(custom)
|
|
| AVEVA Software, LLC | AVEVA InTouch 2020 |
Affected:
unspecified , ≤ R2 P01
(custom)
|
|
| AVEVA Software, LLC | AVEVA Historian 2020 |
Affected:
unspecified , ≤ R2 P01
(custom)
|
|
| AVEVA Software, LLC | AVEVA Communication Drivers Pack 2020 |
Affected:
unspecified , ≤ R2
(custom)
|
|
| AVEVA Software, LLC | AVEVA Batch Management 2020 |
Affected:
unspecified , ≤ 2020
(custom)
|
|
| AVEVA Software, LLC | AVEVA MES 2014 |
Affected:
unspecified , ≤ R2
(custom)
|
Date Public
2021-08-19 00:00
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CVE-2021-32971 (GCVE-0-2021-32971)
Vulnerability from cvelistv5 – Published: 2021-09-23 13:32 – Updated: 2024-09-17 01:06
VLAI
EPSS
VEX
Title
AVEVA SuiteLink Server Null Pointer Dereference
Summary
Null pointer dereference in SuiteLink server while processing command 0x07
Severity
7.5 (High)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.aveva.com/content/dam/aveva/documents… | x_refsource_CONFIRM |
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
| AVEVA Software, LLC | AVEVA System Platform 2020 |
Affected:
unspecified , ≤ R2 P01
(custom)
|
|
| AVEVA Software, LLC | AVEVA InTouch 2020 |
Affected:
unspecified , ≤ R2 P01
(custom)
|
|
| AVEVA Software, LLC | AVEVA Historian 2020 |
Affected:
unspecified , ≤ R2 P01
(custom)
|
|
| AVEVA Software, LLC | AVEVA Communication Drivers Pack 2020 |
Affected:
unspecified , ≤ R2
(custom)
|
|
| AVEVA Software, LLC | AVEVA Batch Management 2020 |
Affected:
unspecified , ≤ 2020
(custom)
|
|
| AVEVA Software, LLC | AVEVA MES 2014 |
Affected:
unspecified , ≤ R2
(custom)
|
Date Public
2021-08-19 00:00
Credits
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CVE-2021-32963 (GCVE-0-2021-32963)
Vulnerability from cvelistv5 – Published: 2021-09-23 13:32 – Updated: 2024-09-17 01:20
VLAI
EPSS
VEX
Title
AVEVA SuiteLink Server Null Pointer Dereference
Summary
Null pointer dereference in SuiteLink server while processing commands 0x03/0x10
Severity
7.5 (High)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
1 reference
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|---|---|
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Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
| AVEVA Software, LLC | AVEVA System Platform 2020 |
Affected:
unspecified , ≤ R2 P01
(custom)
|
|
| AVEVA Software, LLC | AVEVA InTouch 2020 |
Affected:
unspecified , ≤ R2 P01
(custom)
|
|
| AVEVA Software, LLC | AVEVA Historian 2020 |
Affected:
unspecified , ≤ R2 P01
(custom)
|
|
| AVEVA Software, LLC | AVEVA Communication Drivers Pack 2020 |
Affected:
unspecified , ≤ R2
(custom)
|
|
| AVEVA Software, LLC | AVEVA Batch Management 2020 |
Affected:
unspecified , ≤ 2020
(custom)
|
|
| AVEVA Software, LLC | AVEVA MES 2014 |
Affected:
unspecified , ≤ R2
(custom)
|
Date Public
2021-08-19 00:00
Credits
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CVE-2021-32844 (GCVE-0-2021-32844)
Vulnerability from cvelistv5 – Published: 2023-02-17 00:00 – Updated: 2025-03-10 21:10
VLAI
EPSS
VEX
Summary
HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107 and prior of HyperKit, ` vi_pci_write` has is a call to `vc_cfgwrite` that does not check for null which when called makes the host crash. This issue may lead to a guest crashing the host causing a denial of service. This issue is fixed in commit 451558fe8aaa8b24e02e34106e3bb9fe41d7ad13.
Severity
6.2 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
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CVE-2021-32843 (GCVE-0-2021-32843)
Vulnerability from cvelistv5 – Published: 2023-02-17 00:00 – Updated: 2025-03-10 21:10
VLAI
EPSS
VEX
Summary
HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107 and prior of HyperKit, `virtio.c` has is a call to `vc_cfgread` that does not check for null which when called makes the host crash. This issue may lead to a guest crashing the host causing a denial of service. This issue is fixed in commit df0e46c7dbfd81a957d85e449ba41b52f6f7beb4.
Severity
6.2 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
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CVE-2021-31618 (GCVE-0-2021-31618)
Vulnerability from cvelistv5 – Published: 2021-06-15 00:00 – Updated: 2024-08-03 23:03
VLAI
EPSS
VEX
Title
NULL pointer dereference on specially crafted HTTP/2 request
Summary
Apache HTTP Server protocol handler for the HTTP/2 protocol checks received request headers against the size limitations as configured for the server and used for the HTTP/1 protocol as well. On violation of these restrictions and HTTP response is sent to the client with a status code indicating why the request was rejected. This rejection response was not fully initialised in the HTTP/2 protocol handler if the offending header was the very first one received or appeared in a a footer. This led to a NULL pointer dereference on initialised memory, crashing reliably the child process. Since such a triggering HTTP/2 request is easy to craft and submit, this can be exploited to DoS the server. This issue affected mod_http2 1.15.17 and Apache HTTP Server version 2.4.47 only. Apache HTTP Server 2.4.47 was never released.
Severity
No CVSS data available.
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
13 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Affected:
2.4.47
|
Credits
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Mitigation MIT-56
Implementation
For any pointers that could have been modified or provided from a function that can return NULL, check the pointer for NULL before use. When working with a multithreaded or otherwise asynchronous environment, ensure that proper locking APIs are used to lock before the check, and unlock when it has finished [REF-1484].
Mitigation
Requirements
Select a programming language that is not susceptible to these issues.
Mitigation
Implementation
Check the results of all functions that return a value and verify that the value is non-null before acting upon it.
Mitigation
Architecture and Design
Identify all variables and data stores that receive information from external sources, and apply input validation to make sure that they are only initialized to expected values.
Mitigation
Implementation
Explicitly initialize all variables and other data stores, either during declaration or just before the first usage.
No CAPEC attack patterns related to this CWE.