CVE-2022-48303

Publication date 30 January 2023

Last updated 26 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

GNU Tar through 1.34 has a one-byte out-of-bounds read that results in use of uninitialized memory for a conditional jump. Exploitation to change the flow of control has not been demonstrated. The issue occurs in from_header in list.c via a V7 archive in which mtime has approximately 11 whitespace characters.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
tar	23.04 lunar	Fixed 1.34+dfsg-1.2ubuntu0.1
	22.10 kinetic	Fixed 1.34+dfsg-1ubuntu0.1.22.10.1
	22.04 LTS jammy	Fixed 1.34+dfsg-1ubuntu0.1.22.04.1
	20.04 LTS focal	Fixed 1.30+dfsg-7ubuntu0.20.04.3
	18.04 LTS bionic	Fixed 1.29b-2ubuntu0.4
	16.04 LTS xenial	Fixed 1.28-2.1ubuntu0.2+esm2
	14.04 LTS trusty	Fixed 1.27.1-1ubuntu0.1+esm3

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
tar	Upstream: ?id=3da

Severity score breakdown

Parameter	Value
Base score	5.5 · Medium
Attack vector	Local
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H