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CVE-2022-23219

Published: 14 January 2022

The deprecated compatibility function clnt_create in the sunrpc module of the GNU C Library (aka glibc) through 2.34 copies its hostname 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
bionic Does not exist

focal Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

upstream Needs triage

xenial Does not exist

trusty Needed

mantic Does not exist

glibc
Launchpad, Ubuntu, Debian
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)
trusty Does not exist

upstream Needs triage

xenial
Released (2.23-0ubuntu11.3+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
mantic Not vulnerable
(2.35-0ubuntu1)
Patches:
upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=226b46770c82899b555986583294b049c6ec9b40

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