CVE-2023-6246
HIGHCVSS 7.8/10EPSS 4.79%
Last modified
CVE-2023-6246 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 4.79% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Gnu | Glibc | >= 2.36, < 2.39 |
| Fedoraproject | Fedora | 38 |
| Fedoraproject | Fedora | 39 |
References
- http://packetstormsecurity.com/files/176931/glibc-qsort-Out-Of-Bounds-Read-Write.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.htmlExploit, Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2024/Feb/3Exploit, Third Party Advisory
- http://seclists.org/fulldisclosure/2024/Feb/5Exploit, Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2023-6246Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2249053Issue Tracking, Third Party Advisory
- https://security.gentoo.org/glsa/202402-01Third Party Advisory
- https://www.openwall.com/lists/oss-security/2024/01/30/6Exploit, Mailing List, Third Party Advisory
- https://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txtExploit, Third Party Advisory
- http://packetstormsecurity.com/files/176931/glibc-qsort-Out-Of-Bounds-Read-Write.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.htmlExploit, Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2024/Feb/3Exploit, Third Party Advisory
- http://seclists.org/fulldisclosure/2024/Feb/5Exploit, Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2023-6246Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2249053Issue Tracking, Third Party Advisory
- https://security.gentoo.org/glsa/202402-01Third Party Advisory
- https://www.openwall.com/lists/oss-security/2024/01/30/6Exploit, Mailing List, Third Party Advisory
- https://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txtExploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2023-6246?
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.
How severe is CVE-2023-6246?
CVE-2023-6246 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 4.79% probability of exploitation in the next 30 days.
How do I fix CVE-2023-6246?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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Are you affected by CVE-2023-6246?
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Scan your code nowSource: NVD / NIST