CWE-476
NULL Pointer Dereference
The product dereferences a pointer that it expects to be valid but is NULL.
CVE-2020-27819 (GCVE-0-2020-27819)
Vulnerability from cvelistv5 – Published: 2021-02-23 03:40 – Updated: 2024-08-04 16:25
VLAI
Summary
An issue was discovered in libxls before and including 1.6.1 when reading Microsoft Excel files. A NULL pointer dereference vulnerability exists when parsing XLS cells in libxls/xls2csv.c:199. It could allow a remote attacker to cause a denial of service via crafted XLS file.
Severity
No CVSS data available.
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1903296 | x_refsource_MISC |
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CVE-2020-27830 (GCVE-0-2020-27830)
Vulnerability from cvelistv5 – Published: 2021-05-13 14:15 – Updated: 2024-08-04 16:25
VLAI
Summary
A vulnerability was found in Linux Kernel where in the spk_ttyio_receive_buf2() function, it would dereference spk_ttyio_synth without checking whether it is NULL or not, and may lead to a NULL-ptr deref crash.
Severity
No CVSS data available.
CWE
Assigner
References
6 references
| URL | Tags |
|---|---|
| http://www.openwall.com/lists/oss-security/2020/12/08/1 | mailing-listx_refsource_MLIST |
| http://www.openwall.com/lists/oss-security/2020/12/08/4 | mailing-listx_refsource_MLIST |
| https://www.debian.org/security/2021/dsa-4843 | vendor-advisoryx_refsource_DEBIAN |
| https://lists.debian.org/debian-lts-announce/2021… | mailing-listx_refsource_MLIST |
| https://bugzilla.redhat.com/show_bug.cgi?id=1919900 | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2021062… | x_refsource_CONFIRM |
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CVE-2020-3407 (GCVE-0-2020-3407)
Vulnerability from cvelistv5 – Published: 2020-09-24 18:02 – Updated: 2024-11-13 17:55
VLAI
Title
Cisco IOS XE Software RESTCONF and NETCONF-YANG Access Control List Denial of Service Vulnerability
Summary
A vulnerability in the RESTCONF and NETCONF-YANG access control list (ACL) function of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the device to reload. The vulnerability is due to incorrect processing of the ACL that is tied to the RESTCONF or NETCONF-YANG feature. An attacker could exploit this vulnerability by accessing the device using RESTCONF or NETCONF-YANG. A successful exploit could allow an attacker to cause the device to reload, resulting in a denial of service (DoS) condition.
Severity
8.6 (High)
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 XE Software |
Affected:
n/a
|
Date Public
2020-09-24 00:00
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CVE-2020-3481 (GCVE-0-2020-3481)
Vulnerability from cvelistv5 – Published: 2020-07-20 17:45 – Updated: 2024-11-13 18:18
VLAI
Title
Clam AntiVirus (ClamAV) Software Null Pointer Dereference Vulnerability
Summary
A vulnerability in the EGG archive parsing module in Clam AntiVirus (ClamAV) Software versions 0.102.0 - 0.102.3 could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. The vulnerability is due to a null pointer dereference. An attacker could exploit this vulnerability by sending a crafted EGG file to an affected device. An exploit could allow the attacker to cause the ClamAV scanning process crash, resulting in a denial of service condition.
Severity
7.5 (High)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://blog.clamav.net/2020/07/clamav-01024-secu… | vendor-advisoryx_refsource_CISCO |
| https://security.gentoo.org/glsa/202007-23 | vendor-advisoryx_refsource_GENTOO |
| https://usn.ubuntu.com/4435-1/ | vendor-advisoryx_refsource_UBUNTU |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://usn.ubuntu.com/4435-2/ | vendor-advisoryx_refsource_UBUNTU |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.debian.org/debian-lts-announce/2020… | mailing-listx_refsource_MLIST |
Impacted products
Date Public
2020-07-20 00:00
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CVE-2020-3517 (GCVE-0-2020-3517)
Vulnerability from cvelistv5 – Published: 2020-08-27 15:40 – Updated: 2024-11-13 18:09
VLAI
Title
Cisco FXOS and NX-OS Software Cisco Fabric Services Denial of Service Vulnerability
Summary
A vulnerability in the Cisco Fabric Services component of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated attacker to cause process crashes, which could result in a denial of service (DoS) condition on an affected device. The attack vector is configuration dependent and could be remote or adjacent. For more information about the attack vector, see the Details section of this advisory. The vulnerability is due to insufficient error handling when the affected software parses Cisco Fabric Services messages. An attacker could exploit this vulnerability by sending malicious Cisco Fabric Services messages to an affected device. A successful exploit could allow the attacker to cause a reload of an affected device, which could result in a DoS condition.
Severity
8.6 (High)
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 NX-OS Software |
Affected:
n/a
|
Date Public
2020-08-26 00:00
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CVE-2020-35495 (GCVE-0-2020-35495)
Vulnerability from cvelistv5 – Published: 2021-01-04 14:23 – Updated: 2024-08-04 17:02
VLAI
Summary
There's a flaw in binutils /bfd/pef.c. An attacker who is able to submit a crafted input file to be processed by the objdump program could cause a null pointer dereference. The greatest threat from this flaw is to application availability. This flaw affects binutils versions prior to 2.34.
Severity
No CVSS data available.
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1911441 | x_refsource_MISC |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://security.netapp.com/advisory/ntap-2021021… | x_refsource_CONFIRM |
| https://security.gentoo.org/glsa/202107-24 | vendor-advisoryx_refsource_GENTOO |
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CVE-2020-35496 (GCVE-0-2020-35496)
Vulnerability from cvelistv5 – Published: 2021-01-04 14:24 – Updated: 2024-08-04 17:02
VLAI
Summary
There's a flaw in bfd_pef_scan_start_address() of bfd/pef.c in binutils which could allow an attacker who is able to submit a crafted file to be processed by objdump to cause a NULL pointer dereference. The greatest threat of this flaw is to application availability. This flaw affects binutils versions prior to 2.34.
Severity
No CVSS data available.
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1911444 | x_refsource_MISC |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://security.netapp.com/advisory/ntap-2021021… | x_refsource_CONFIRM |
| https://security.gentoo.org/glsa/202107-24 | vendor-advisoryx_refsource_GENTOO |
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CVE-2020-35499 (GCVE-0-2020-35499)
Vulnerability from cvelistv5 – Published: 2021-02-19 19:49 – Updated: 2024-08-04 17:02
VLAI
Summary
A NULL pointer dereference flaw in Linux kernel versions prior to 5.11 may be seen if sco_sock_getsockopt function in net/bluetooth/sco.c do not have a sanity check for a socket connection, when using BT_SNDMTU/BT_RCVMTU for SCO sockets. This could allow a local attacker with a special user privilege to crash the system (DOS) or leak kernel internal information.
Severity
No CVSS data available.
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1910048 | x_refsource_MISC |
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CVE-2020-35503 (GCVE-0-2020-35503)
Vulnerability from cvelistv5 – Published: 2021-06-02 13:22 – Updated: 2024-08-04 17:02
VLAI
Summary
A NULL pointer dereference flaw was found in the megasas-gen2 SCSI host bus adapter emulation of QEMU in versions before and including 6.0. This issue occurs in the megasas_command_cancelled() callback function while dropping a SCSI request. 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
2 references
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1910346 | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2021072… | x_refsource_CONFIRM |
Impacted products
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CVE-2020-35504 (GCVE-0-2020-35504)
Vulnerability from cvelistv5 – Published: 2021-05-28 10:20 – Updated: 2024-08-04 17:02
VLAI
Summary
A NULL pointer dereference flaw was found in the SCSI emulation support of QEMU in versions before 6.0.0. 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
6 references
| URL | Tags |
|---|---|
| http://www.openwall.com/lists/oss-security/2021/04/16/3 | mailing-listx_refsource_MLIST |
| https://bugzilla.redhat.com/show_bug.cgi?id=1909766 | x_refsource_MISC |
| https://www.openwall.com/lists/oss-security/2021/… | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2021071… | x_refsource_CONFIRM |
| https://security.gentoo.org/glsa/202208-27 | vendor-advisoryx_refsource_GENTOO |
| https://lists.debian.org/debian-lts-announce/2022… | mailing-listx_refsource_MLIST |
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},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
Mitigation ID: MIT-56
Phase: Implementation
Description:
- 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
Phase: Requirements
Description:
- Select a programming language that is not susceptible to these issues.
Mitigation
Phase: Implementation
Description:
- Check the results of all functions that return a value and verify that the value is non-null before acting upon it.
Mitigation
Phase: Architecture and Design
Description:
- 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
Phase: Implementation
Description:
- 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.