Your submission was sent successfully! Close

You have successfully unsubscribed! Close

Thank you for signing up for our newsletter!
In these regular emails you will find the latest updates about Ubuntu and upcoming events where you can meet our team.Close

CVE-2023-6779

Published: 31 January 2024

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.

Priority

Medium

Cvss 3 Severity Score

7.5

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=7e5a0c286da33159d47d0122007aac016f3e02cd
eglibc
Launchpad, Ubuntu, Debian
trusty Not vulnerable

xenial Does not exist

bionic Does not exist

focal Does not exist

jammy Does not exist

mantic Does not exist

upstream Needs triage

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H