CVE-2023-6779
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | fixed | 2.36-9+deb12u4 |
| debian | bullseye | fixed | 0 |
| debian | forky | fixed | 2.37-15 |
| debian | sid | fixed | 2.37-15 |
| debian | trixie | fixed | 2.37-15 |
| sles | affected | | |
| fedora | 38 | affected | |
| fedora | 39 | affected | |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| gnu | glibc | {"startIncluding":"2.37","endExcluding":"2.39"} | 2.39 |
References
- http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.html
- http://seclists.org/fulldisclosure/2024/Feb/3
- https://access.redhat.com/security/cve/CVE-2023-6779
- https://bugzilla.redhat.com/show_bug.cgi?id=2254395
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/D2FIH77VHY3KCRROCXOT6L27WMZXSJ2G/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MWQ6BZJ6CV5UAW4VZSKJ6TO4KIW2KWAQ/
- https://security.gentoo.org/glsa/202402-01
- https://security.netapp.com/advisory/ntap-20240223-0006/
- https://www.openwall.com/lists/oss-security/2024/01/30/6
- https://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txt
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://security-tracker.debian.org/tracker/CVE-2023-6779
- https://www.suse.com/security/cve/CVE-2023-6779.html
CWEs
CWE-122 CWE-787
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.