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-2021-37615 (GCVE-0-2021-37615)
Vulnerability from cvelistv5 – Published: 2021-08-09 00:00 – Updated: 2024-08-04 01:23
VLAI
EPSS
VEX
Title
Null pointer dereference in Exiv2::Internal::resolveLens0x319
Summary
Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files. A null pointer dereference was found in Exiv2 versions v0.27.4 and earlier. The null pointer dereference is triggered when Exiv2 is used to print the metadata of a crafted image file. An attacker could potentially exploit the vulnerability to cause a denial of service, if they can trick the victim into running Exiv2 on a crafted image file. Note that this bug is only triggered when printing the interpreted (translated) data, which is a less frequently used Exiv2 operation that requires an extra command line option (`-p t` or `-P t`). The bug is fixed in version v0.27.5.
Severity
4.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/Exiv2/exiv2/pull/1758 | |
| https://github.com/Exiv2/exiv2/security/advisorie… | |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisory |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisory |
| https://security.gentoo.org/glsa/202312-06 | vendor-advisory |
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CVE-2021-35985 (GCVE-0-2021-35985)
Vulnerability from cvelistv5 – Published: 2021-08-20 18:10 – Updated: 2024-09-16 16:12
VLAI
EPSS
VEX
Title
Adobe Acrobat Pro DC PDFLibTool Null Pointer Dereference Bug
Summary
Acrobat Reader DC versions 2021.005.20054 (and earlier), 2020.004.30005 (and earlier) and 2017.011.30197 (and earlier) are affected by a Null pointer dereference vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve an application denial-of-service in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Severity
5.5 (Medium)
CWE
- CWE-476 - NULL Pointer Dereference (CWE-476)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://helpx.adobe.com/security/products/acrobat… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Adobe | Acrobat Reader |
Affected:
unspecified , ≤ 2020.004.30005
(custom)
Affected: unspecified , ≤ 2017.011.30197 (custom) Affected: unspecified , ≤ 2021.005.20054 (custom) Affected: unspecified , ≤ None (custom) |
Date Public
2021-07-13 00:00
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CVE-2021-35984 (GCVE-0-2021-35984)
Vulnerability from cvelistv5 – Published: 2021-08-20 18:10 – Updated: 2024-09-16 17:18
VLAI
EPSS
VEX
Title
Adobe Acrobat Pro DC PDFLibTool Null Pointer Dereference Bug
Summary
Acrobat Reader DC versions 2021.005.20054 (and earlier), 2020.004.30005 (and earlier) and 2017.011.30197 (and earlier) are affected by a Null pointer dereference vulnerability. An authenticated attacker could leverage this vulnerability achieve an application denial-of-service in the context of the current user. Exploitation of this issue does not requires user interaction.
Severity
5.5 (Medium)
CWE
- CWE-476 - NULL Pointer Dereference (CWE-476)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://helpx.adobe.com/security/products/acrobat… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Adobe | Acrobat Reader |
Affected:
unspecified , ≤ 2020.004.30005
(custom)
Affected: unspecified , ≤ 2017.011.30197 (custom) Affected: unspecified , ≤ 2021.005.20054 (custom) Affected: unspecified , ≤ None (custom) |
Date Public
2021-07-13 00:00
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CVE-2021-34798 (GCVE-0-2021-34798)
Vulnerability from cvelistv5 – Published: 2021-09-16 14:40 – Updated: 2024-08-04 00:26
VLAI
EPSS
VEX
Title
NULL pointer dereference in httpd core
Summary
Malformed requests may cause the server to dereference a NULL pointer. This issue affects Apache HTTP Server 2.4.48 and earlier.
Severity
No CVSS data available.
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
17 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Affected:
Apache HTTP Server 2.4 , ≤ 2.4.48
(custom)
|
Credits
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CVE-2021-34737 (GCVE-0-2021-34737)
Vulnerability from cvelistv5 – Published: 2021-09-09 05:01 – Updated: 2024-11-07 22:00
VLAI
EPSS
VEX
Title
Cisco IOS XR Software DHCP Version 4 Server Denial of Service Vulnerability
Summary
A vulnerability in the DHCP version 4 (DHCPv4) server feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to trigger a crash of the dhcpd process, resulting in a denial of service (DoS) condition. This vulnerability exists because certain DHCPv4 messages are improperly validated when they are processed by an affected device. An attacker could exploit this vulnerability by sending a malformed DHCPv4 message to an affected device. A successful exploit could allow the attacker to cause a NULL pointer dereference, resulting in a crash of the dhcpd process. While the dhcpd process is restarting, which may take up to approximately two minutes, DHCPv4 server services are unavailable on the affected device. This could temporarily prevent network access to clients that join the network during that time period. Note: Only the dhcpd process crashes and eventually restarts automatically. The router does not reload.
Severity
5.8 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://tools.cisco.com/security/center/content/C… | vendor-advisoryx_refsource_CISCO |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cisco | Cisco IOS XR Software |
Affected:
n/a
|
Date Public
2021-09-08 00:00
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CVE-2021-34586 (GCVE-0-2021-34586)
Vulnerability from cvelistv5 – Published: 2021-10-26 09:55 – Updated: 2024-09-17 03:53
VLAI
EPSS
VEX
Title
CODESYS V2 web server: crafted requests could trigger a null pointer dereference (DoS)
Summary
In the CODESYS V2 web server prior to V1.1.9.22 crafted web server requests may cause a Null pointer dereference in the CODESYS web server and may result in a denial-of-service condition.
Severity
7.5 (High)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://customers.codesys.com/index.php?eID=dumpF… | x_refsource_CONFIRM |
| https://www.tenable.com/security/research/tra-2021-47 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| CODESYS | CODESYS V2 |
Affected:
all web servers , < V1.1.9.22
(custom)
|
Date Public
2021-10-25 00:00
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CVE-2021-34406 (GCVE-0-2021-34406)
Vulnerability from cvelistv5 – Published: 2022-01-18 18:05 – Updated: 2024-08-04 00:12
VLAI
EPSS
VEX
Summary
NVIDIA Tegra kernel driver contains a vulnerability in NVHost, where a specific race condition can lead to a null pointer dereference, which may lead to a system reboot.
Severity
4.7 (Medium)
CWE
- CWE-476 - - NULL Pointer Dereference
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://nvidia.custhelp.com/app/answers/detail/a_… | x_refsource_CONFIRM |
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CVE-2021-33798 (GCVE-0-2021-33798)
Vulnerability from cvelistv5 – Published: 2023-07-07 17:39 – Updated: 2024-10-28 15:46
VLAI
EPSS
VEX
Summary
A null pointer dereference was found in libpano13, version libpano13-2.9.20. The flow allows attackers to cause a denial of service and potential code execute via a crafted file.
Severity
4.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
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CVE-2021-33717 (GCVE-0-2021-33717)
Vulnerability from cvelistv5 – Published: 2021-08-10 10:35 – Updated: 2024-08-03 23:58
VLAI
EPSS
VEX
Summary
A vulnerability has been identified in JT2Go (All versions < V13.2.0.1), Teamcenter Visualization (All versions < V13.2.0.1). When parsing specially crafted CGM Files, a NULL pointer deference condition could cause the application to crash. The application must be restarted to restore the service. 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
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Siemens | JT2Go |
Affected:
All versions < V13.2.0.1
|
|
| Siemens | Teamcenter Visualization |
Affected:
All versions < V13.2.0.1
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CVE-2021-33715 (GCVE-0-2021-33715)
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 race condition could cause an object to be released before being operated on, leading to NULL pointer deference condition and 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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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.