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CVE-2022-23218

Published: 14 January 2022

The deprecated compatibility function svcunix_create in the sunrpc module of the GNU C Library (aka glibc) through 2.34 copies its path argument on the stack without validating its length, which may result in a buffer overflow, potentially resulting in a denial of service or (if an application is not built with a stack protector enabled) arbitrary code execution.

Notes

AuthorNote
mdeslaur
Ubuntu has stack protector enabled since 2006, so this issue is
only a denial of service.

Priority

Low

Cvss 3 Severity Score

9.8

Score breakdown

Status

Package Release Status
eglibc
Launchpad, Ubuntu, Debian
xenial Does not exist

bionic Does not exist

focal Does not exist

impish Does not exist

upstream Needs triage

jammy Does not exist

kinetic Does not exist

lunar Does not exist

trusty Needed

glibc
Launchpad, Ubuntu, Debian
trusty Does not exist

upstream Needs triage

bionic
Released (2.27-3ubuntu1.5)
focal
Released (2.31-0ubuntu9.7)
impish
Released (2.34-0ubuntu3.2)
jammy Not vulnerable
(2.35-0ubuntu1)
kinetic Not vulnerable
(2.35-0ubuntu1)
lunar Not vulnerable
(2.35-0ubuntu1)
xenial
Released (2.23-0ubuntu11.3+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
Patches:
upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=f545ad4928fa1f27a3075265182b38a4f939a5f7

Severity score breakdown

Parameter Value
Base score 9.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H