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CVE-2021-35942

Published: 22 July 2021

The wordexp function in the GNU C Library (aka glibc) through 2.33 may crash or read arbitrary memory in parse_param (in posix/wordexp.c) when called with an untrusted, crafted pattern, potentially resulting in a denial of service or disclosure of information. This occurs because atoi was used but strtoul should have been used to ensure correct calculations.

Priority

Low

Cvss 3 Severity Score

9.1

Score breakdown

Status

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

bionic Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

trusty Needed

upstream Needs triage

xenial Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

mantic Does not exist

glibc
Launchpad, Ubuntu, Debian
impish Not vulnerable
(2.34-0ubuntu1)
lunar Not vulnerable
(2.34-0ubuntu1)
upstream
Released (2.34)
trusty Does not exist

bionic
Released (2.27-3ubuntu1.5)
groovy Ignored
(end of life)
focal
Released (2.31-0ubuntu9.7)
hirsute Ignored
(end of life)
xenial
Released (2.23-0ubuntu11.3+esm2)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
jammy Not vulnerable
(2.34-0ubuntu1)
kinetic Not vulnerable
(2.34-0ubuntu1)
mantic Not vulnerable
(2.34-0ubuntu1)
Patches:
upstream: https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=5adda61f62b77384718b4c0d8336ade8f2b4b35c

Severity score breakdown

Parameter Value
Base score 9.1
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H