CVE-2023-6779

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.

• CWE-122
• CWE-787

• http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.htmlExploit, Third Party Advisory, VDB Entry
• http://seclists.org/fulldisclosure/2024/Feb/3Exploit, Mailing List, Third Party Advisory
• https://access.redhat.com/security/cve/CVE-2023-6779Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2254395Issue Tracking
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/D2FIH77VHY3KCRROCXOT6L27WMZXSJ2G/Mailing List
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MWQ6BZJ6CV5UAW4VZSKJ6TO4KIW2KWAQ/Mailing List
• https://security.gentoo.org/glsa/202402-01Third Party Advisory
• https://security.netapp.com/advisory/ntap-20240223-0006/Third Party Advisory
• https://www.openwall.com/lists/oss-security/2024/01/30/6Exploit, Mailing List
• https://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txtThird Party Advisory
• http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.htmlExploit, Third Party Advisory, VDB Entry
• http://seclists.org/fulldisclosure/2024/Feb/3Exploit, Mailing List, Third Party Advisory
• https://access.redhat.com/security/cve/CVE-2023-6779Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2254395Issue Tracking
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/D2FIH77VHY3KCRROCXOT6L27WMZXSJ2G/Mailing List
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MWQ6BZJ6CV5UAW4VZSKJ6TO4KIW2KWAQ/Mailing List
• https://security.gentoo.org/glsa/202402-01Third Party Advisory
• https://security.netapp.com/advisory/ntap-20240223-0006/Third Party Advisory
• https://www.openwall.com/lists/oss-security/2024/01/30/6Exploit, Mailing List
• https://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txtThird Party Advisory
• https://cert-portal.siemens.com/productcert/html/ssa-082556.html

Published

Jan 31, 2024

Last Modified

Jun 17, 2026

Status

Modified

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