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CVE-2023-6246 Details

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.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.8 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CNA: [email protected]CVSS-B:8.4 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://cert-portal.siemens.com/productcert/html/ssa-082556.html	siemens-SADP
http://packetstormsecurity.com/files/176931/glibc-qsort-Out-Of-Bounds-Read-Write.html	CVE	ExploitThird Party AdvisoryVDB Entry
http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.html	CVE	ExploitThird Party AdvisoryVDB Entry
https://access.redhat.com/security/cve/CVE-2023-6246	CVE	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2249053	CVE	Issue TrackingThird Party Advisory
http://seclists.org/fulldisclosure/2024/Feb/3	CVE	ExploitThird Party Advisory
http://seclists.org/fulldisclosure/2024/Feb/5	CVE	ExploitThird Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/D2FIH77VHY3KCRROCXOT6L27WMZXSJ2G/	CVE	Mailing List
https://lists.fedoraproject.org/archives/list/[email protected]/message/MWQ6BZJ6CV5UAW4VZSKJ6TO4KIW2KWAQ/	CVE	Mailing List
https://security.gentoo.org/glsa/202402-01	CVE	Third Party Advisory
https://security.netapp.com/advisory/ntap-20240216-0007/	CVE
https://www.openwall.com/lists/oss-security/2024/01/30/6	CVE	ExploitMailing ListThird Party Advisory
https://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txt	CVE	ExploitThird Party Advisory
http://packetstormsecurity.com/files/176931/glibc-qsort-Out-Of-Bounds-Read-Write.html	[email protected]	ExploitThird Party AdvisoryVDB Entry
http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.html	[email protected]	ExploitThird Party AdvisoryVDB Entry
https://access.redhat.com/security/cve/CVE-2023-6246	[email protected]	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2249053	[email protected]	Issue TrackingThird Party Advisory
http://seclists.org/fulldisclosure/2024/Feb/3	[email protected]	ExploitThird Party Advisory
http://seclists.org/fulldisclosure/2024/Feb/5	[email protected]	ExploitThird Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/D2FIH77VHY3KCRROCXOT6L27WMZXSJ2G/	[email protected]	Mailing List
https://lists.fedoraproject.org/archives/list/[email protected]/message/MWQ6BZJ6CV5UAW4VZSKJ6TO4KIW2KWAQ/	[email protected]	Mailing List
https://security.gentoo.org/glsa/202402-01	[email protected]	Third Party Advisory
https://security.netapp.com/advisory/ntap-20240216-0007/	[email protected]
https://www.openwall.com/lists/oss-security/2024/01/30/6	[email protected]	ExploitMailing ListThird Party Advisory
https://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txt	[email protected]	ExploitThird Party Advisory

see all 25 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-787	Out-of-bounds Write	[email protected]
CWE-122	Heap-based Buffer Overflow	[email protected]

Affected Products

Product	Versions
gnu glibc	>= 2.36, < 2.39
CPE cpe:2.3:a:gnu:glibc:::::::: Remediation No remediation found in references.
fedoraproject fedora	38 39
CPE cpe:2.3:o:fedoraproject:fedora:38:::::::* cpe:2.3:o:fedoraproject:fedora:39:::::::* Remediation No remediation found in references.

Change History

16 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	siemens-SADP
Jun 17, 2026	CVE Modified	CISA-ADP
May 12, 2026	CVE Modified	siemens-SADP
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Feb 16, 2024	CVE Modified	[email protected]
Feb 15, 2024	Modified Analysis	[email protected]
Feb 15, 2024	CVE Modified	[email protected]
Feb 4, 2024	CVE Modified	[email protected]
Feb 4, 2024	CVE Modified	[email protected]
Feb 2, 2024	CVE Modified	[email protected]
Feb 1, 2024	CVE Modified	[email protected]
Jan 31, 2024	CVE Modified	[email protected]
Jan 31, 2024	Initial Analysis	[email protected]
Jan 31, 2024	New CVE Received	[email protected]