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CVE-2023-6779

8.2 · HIGH

An off-by-one heap-based buffer overflow was found in the __vsyslog_internal function of the glibc library.

Published Jan 31, 2024CWE-122EPSS 3.15%

Overview

CVE-2023-6779 is a high-severity vulnerability. It was published on January 31, 2024 and has a CVSS 3.1 base score of 8.2 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

An off-by-one heap-based buffer overflow was found in the __vsyslog_internal function of the glibc library. This function is called by the syslog and vsyslog functions. This issue occurs when these functions are called with a message bigger than INT_MAX bytes, leading to an incorrect calculation of the buffer size to store the message, resulting in an application crash. This issue affects glibc 2.37 and newer.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refpacketstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.htmlRefseclists.org/fulldisclosure/2024/Feb/3Refaccess.redhat.com/security/cve/CVE-2023-6779Refbugzilla.redhat.com/show_bug.cgi?id=2254395Reflists.fedoraproject.org/archives/list/[email protected]/message/D2FIH77VHY3KCRROCXOT6L27WMZXSJ2G/Reflists.fedoraproject.org/archives/list/[email protected]/message/MWQ6BZJ6CV5UAW4VZSKJ6TO4KIW2KWAQ/Refsecurity.gentoo.org/glsa/202402-01Refsecurity.netapp.com/advisory/ntap-20240223-0006/Refwww.openwall.com/lists/oss-security/2024/01/30/6Refwww.qualys.com/2024/01/30/cve-2023-6246/syslog.txt

How CyberStrike helps

Frequently asked questions

What is CVE-2023-6779?

CVE-2023-6779 is a high-severity vulnerability. It was published on January 31, 2024 and has a CVSS 3.1 base score of 8.2 (HIGH).

How severe is CVE-2023-6779?

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2023-6779?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-6779?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-6779 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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