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CVE-2023-6246

Published: 31 January 2024

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.

Notes

AuthorNote
mdeslaur
introduced by:
https://sourceware.org/git/?p=glibc.git;a=commit;h=52a5be0df411ef3ff45c10c7c308cb92993d15b1
in glibc 3.36

Priority

Medium

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package Release Status
glibc
Launchpad, Ubuntu, Debian
trusty Does not exist

upstream
Released (2.37-15)
bionic Not vulnerable

focal Not vulnerable
(2.31-0ubuntu9.14)
jammy Not vulnerable
(2.35-0ubuntu3.6)
xenial Not vulnerable

mantic
Released (2.38-1ubuntu6.1)
Patches:
upstream: https://sourceware.org/git/?p=glibc.git;a=commit;h=6bd0e4efcc78f3c0115e5ea9739a1642807450da
eglibc
Launchpad, Ubuntu, Debian
xenial Does not exist

bionic Does not exist

focal Does not exist

jammy Does not exist

mantic Does not exist

upstream Needs triage

trusty Not vulnerable

Severity score breakdown

Parameter Value
Base score 7.8
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H