Vulnerability Description
A 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 the openlog function was not called, or called with the ident argument set to NULL, and the program name (the basename of argv[0]) is bigger than 1024 bytes, resulting in an application crash or local privilege escalation. This issue affects glibc 2.36 and newer.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gnu | Glibc | >= 2.36, < 2.39 |
| Fedoraproject | Fedora | 38 |
Related Weaknesses (CWE)
References
- http://packetstormsecurity.com/files/176931/glibc-qsort-Out-Of-Bounds-Read-WriteExploitThird Party AdvisoryVDB Entry
- http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-OverfExploitThird Party AdvisoryVDB Entry
- http://seclists.org/fulldisclosure/2024/Feb/3ExploitThird Party Advisory
- http://seclists.org/fulldisclosure/2024/Feb/5ExploitThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2023-6246Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2249053Issue TrackingThird Party Advisory
- https://lists.fedoraproject.org/archives/list/[email protected]Mailing List
- https://lists.fedoraproject.org/archives/list/[email protected]Mailing List
- https://security.gentoo.org/glsa/202402-01Third Party Advisory
- https://security.netapp.com/advisory/ntap-20240216-0007/
- https://www.openwall.com/lists/oss-security/2024/01/30/6ExploitMailing ListThird Party Advisory
- https://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txtExploitThird Party Advisory
- http://packetstormsecurity.com/files/176931/glibc-qsort-Out-Of-Bounds-Read-WriteExploitThird Party AdvisoryVDB Entry
- http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-OverfExploitThird Party AdvisoryVDB Entry
- http://seclists.org/fulldisclosure/2024/Feb/3ExploitThird Party Advisory
FAQ
What is CVE-2023-6246?
CVE-2023-6246 is a vulnerability with a CVSS score of 8.4 (HIGH). A 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 the openlog function...
How severe is CVE-2023-6246?
CVE-2023-6246 has been rated HIGH with a CVSS base score of 8.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-6246?
Check the references section above for vendor advisories and patch information. Affected products include: Gnu Glibc, Fedoraproject Fedora.