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.
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
The product writes data past the end, or before the beginning, of the intended buffer.
| Link | Tags |
|---|---|
| http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.html | third party advisory vdb entry exploit |
| http://seclists.org/fulldisclosure/2024/Feb/3 | mailing list third party advisory exploit |
| https://access.redhat.com/security/cve/CVE-2023-6779 | third party advisory vdb entry |
| https://bugzilla.redhat.com/show_bug.cgi?id=2254395 | issue 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/202402-01 | third party advisory |
| https://www.openwall.com/lists/oss-security/2024/01/30/6 | exploit mailing list |
| https://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txt | third party advisory |
| https://security.netapp.com/advisory/ntap-20240223-0006/ | third party advisory |