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.
6353 vulnerabilities reference this CWE, most recent first.
CVE-2021-23180 (GCVE-0-2021-23180)
Vulnerability from cvelistv5 – Published: 2022-03-02 22:29 – Updated: 2024-08-03 19:05
VLAI
EPSS
VEX
Summary
A flaw was found in htmldoc in v1.9.12 and before. Null pointer dereference in file_extension(),in file.c may lead to execute arbitrary code and denial of service.
Severity
No CVSS data available.
CWE
- CWE-476 - - NULL Pointer Dereference, CWE-400 - Uncontrolled Resource Consumption
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/michaelrsweet/htmldoc/issues/418 | x_refsource_MISC |
| https://bugzilla.redhat.com/show_bug.cgi?id=1967041 | x_refsource_MISC |
| https://ubuntu.com/security/CVE-2021-23180 | x_refsource_MISC |
| https://github.com/michaelrsweet/htmldoc/commit/1… | x_refsource_MISC |
Impacted products
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CVE-2021-22792 (GCVE-0-2021-22792)
Vulnerability from cvelistv5 – Published: 2021-09-02 16:53 – Updated: 2026-05-29 13:59
VLAI
EPSS
VEX
Summary
A CWE-476: NULL Pointer Dereference vulnerability that could cause a Denial of Service on the Modicon PLC controller / simulator when updating the controller application with a specially crafted project file exists in Modicon M580 CPU (part numbers BMEP* and BMEH*, all versions), Modicon M340 CPU (part numbers BMXP34*, all versions), Modicon MC80 (part numbers BMKC80*, all versions), Modicon Momentum Ethernet CPU (part numbers 171CBU*, all versions), PLC Simulator for EcoStruxureª Control Expert, including all Unity Pro versions (former name of EcoStruxureª Control Expert, all versions), PLC Simulator for EcoStruxureª Process Expert including all HDCS versions (former name of EcoStruxureª Process Expert, all versions), Modicon Quantum CPU (part numbers 140CPU*, all versions), Modicon Premium CPU (part numbers TSXP5*, all versions).
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://download.schneider-electric.com/files?p_D… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | Modicon M580 CPU (part numbers BMEP* and BMEH*, all versions), Modicon M340 CPU (part numbers BMXP34*, all versions), Modicon MC80 (part numbers BMKC80*, all versions), Modicon Momentum Ethernet CPU (part numbers 171CBU*, all versions), PLC Simulator for EcoStruxureª Control Expert, including all Unity Pro versions (former name of EcoStruxureª Control Expert, all versions), PLC Simulator for EcoStruxureª Process Expert including all HDCS versions (former name of EcoStruxureª Process Expert, all versions), Modicon Quantum CPU (part numbers 140CPU*, all versions), Modicon Premium CPU (part numbers TSXP5*, all versions) |
Affected:
Modicon M580 CPU (part numbers BMEP* and BMEH*, all versions), Modicon M340 CPU (part numbers BMXP34*, all versions), Modicon MC80 (part numbers BMKC80*, all versions), Modicon Momentum Ethernet CPU (part numbers 171CBU*, all versions), PLC Simulator for EcoStruxureª Control Expert, including all Unity Pro versions (former name of EcoStruxureª Control Expert, all versions), PLC Simulator for EcoStruxureª Process Expert including all HDCS versions (former name of EcoStruxureª Process Expert, all versions), Modicon Quantum CPU (part numbers 140CPU*, all versions), Modicon Premium CPU (part numbers TSXP5*, all versions)
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CVE-2021-22570 (GCVE-0-2021-22570)
Vulnerability from cvelistv5 – Published: 2022-01-26 00:00 – Updated: 2025-04-21 13:56
VLAI
EPSS
VEX
Title
Nullptr Dereference in Protobuf
Summary
Nullptr dereference when a null char is present in a proto symbol. The symbol is parsed incorrectly, leading to an unchecked call into the proto file's name during generation of the resulting error message. Since the symbol is incorrectly parsed, the file is nullptr. We recommend upgrading to version 3.15.0 or greater.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
11 references
| URL | Tags |
|---|---|
| https://github.com/protocolbuffers/protobuf/relea… | |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisory |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisory |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisory |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisory |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisory |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisory |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisory |
| https://www.oracle.com/security-alerts/cpuapr2022.html | |
| https://security.netapp.com/advisory/ntap-2022042… | |
| https://lists.debian.org/debian-lts-announce/2023… | mailing-list |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Google LLC | Protobuf |
Affected:
unspecified , < 3.15.0
(custom)
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CVE-2021-21702 (GCVE-0-2021-21702)
Vulnerability from cvelistv5 – Published: 2021-02-15 04:10 – Updated: 2024-09-16 17:34
VLAI
EPSS
VEX
Title
Null Dereference in SoapClient
Summary
In PHP versions 7.3.x below 7.3.27, 7.4.x below 7.4.15 and 8.0.x below 8.0.2, when using SOAP extension to connect to a SOAP server, a malicious SOAP server could return malformed XML data as a response that would cause PHP to access a null pointer and thus cause a crash.
Severity
5.3 (Medium)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://bugs.php.net/bug.php?id=80672 | x_refsource_MISC |
| https://www.debian.org/security/2021/dsa-4856 | vendor-advisoryx_refsource_DEBIAN |
| https://security.gentoo.org/glsa/202105-23 | vendor-advisoryx_refsource_GENTOO |
| https://lists.debian.org/debian-lts-announce/2021… | mailing-listx_refsource_MLIST |
| https://www.oracle.com/security-alerts/cpuoct2021.html | x_refsource_MISC |
| https://www.tenable.com/security/tns-2021-14 | x_refsource_CONFIRM |
| https://security.netapp.com/advisory/ntap-2021031… | x_refsource_CONFIRM |
Impacted products
Date Public
2021-02-01 00:00
Credits
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CVE-2021-21057 (GCVE-0-2021-21057)
Vulnerability from cvelistv5 – Published: 2021-02-11 19:42 – Updated: 2024-09-17 02:06
VLAI
EPSS
VEX
Title
Acrobat Reader DC Invalid Memory Read Due To An Uninitialized Pointer
Summary
Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by a null pointer dereference vulnerability when parsing a specially crafted PDF file. An unauthenticated attacker could leverage this vulnerability to achieve 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
6.6 (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 , ≤ 2020.013.20074
(custom)
Affected: unspecified , ≤ 2020.001.30018 (custom) Affected: unspecified , ≤ 2017.011.30188 (custom) Affected: unspecified , ≤ None (custom) |
Date Public
2021-02-09 00:00
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CVE-2021-20299 (GCVE-0-2021-20299)
Vulnerability from cvelistv5 – Published: 2022-03-16 00:00 – Updated: 2024-08-03 17:37
VLAI
EPSS
VEX
Summary
A flaw was found in OpenEXR's Multipart input file functionality. A crafted multi-part input file with no actual parts can trigger a NULL pointer dereference. The highest threat from this vulnerability is to system availability.
Severity
No CVSS data available.
CWE
- CWE-476 - (NULL Pointer Dereference)
Assigner
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CVE-2021-20296 (GCVE-0-2021-20296)
Vulnerability from cvelistv5 – Published: 2021-04-01 00:00 – Updated: 2024-08-03 17:37
VLAI
EPSS
VEX
Summary
A flaw was found in OpenEXR in versions before 3.0.0-beta. A crafted input file supplied by an attacker, that is processed by the Dwa decompression functionality of OpenEXR's IlmImf library, could cause a NULL pointer dereference. The highest threat from this vulnerability is to system availability.
Severity
No CVSS data available.
CWE
Assigner
References
5 references
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CVE-2021-20274 (GCVE-0-2021-20274)
Vulnerability from cvelistv5 – Published: 2021-03-09 13:11 – Updated: 2024-08-03 17:37
VLAI
EPSS
VEX
Summary
A flaw was found in privoxy before 3.0.32. A crash may occur due a NULL-pointer dereference when the socks server misbehaves.
Severity
No CVSS data available.
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://www.privoxy.org/announce.txt | x_refsource_MISC |
| https://bugzilla.redhat.com/show_bug.cgi?id=1936662 | x_refsource_MISC |
| https://security.gentoo.org/glsa/202107-16 | vendor-advisoryx_refsource_GENTOO |
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CVE-2021-20213 (GCVE-0-2021-20213)
Vulnerability from cvelistv5 – Published: 2021-03-25 18:57 – Updated: 2024-08-03 17:30
VLAI
EPSS
VEX
Summary
A flaw was found in Privoxy in versions before 3.0.29. Dereference of a NULL-pointer that could result in a crash if accept-intercepted-requests was enabled, Privoxy failed to get the request destination from the Host header and a memory allocation failed.
Severity
No CVSS data available.
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://www.privoxy.org/3.0.29/user-manual/whatsn… | x_refsource_MISC |
| https://bugzilla.redhat.com/show_bug.cgi?id=1928739 | x_refsource_MISC |
| https://security.gentoo.org/glsa/202107-16 | vendor-advisoryx_refsource_GENTOO |
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CVE-2021-20196 (GCVE-0-2021-20196)
Vulnerability from cvelistv5 – Published: 2021-05-26 21:16 – Updated: 2024-08-03 17:30
VLAI
EPSS
VEX
Summary
A NULL pointer dereference flaw was found in the floppy disk emulator of QEMU. This issue occurs while processing read/write ioport commands if the selected floppy drive is not initialized with a block device. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
Severity
No CVSS data available.
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://bugs.launchpad.net/qemu/+bug/1912780 | x_refsource_MISC |
| https://www.openwall.com/lists/oss-security/2021/… | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2021070… | x_refsource_CONFIRM |
| https://lists.debian.org/debian-lts-announce/2022… | mailing-listx_refsource_MLIST |
| https://lists.debian.org/debian-lts-announce/2022… | mailing-listx_refsource_MLIST |
Impacted products
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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.