CVE-2021-20193

Publication date 26 March 2021

Last updated 28 October 2024

Ubuntu priority

Cvss 3 Severity Score

A flaw was found in the src/list.c of tar 1.33 and earlier. This flaw allows an attacker who can submit a crafted input file to tar to cause uncontrolled consumption of memory. The highest threat from this vulnerability is to system availability.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
tar	23.04 lunar	Fixed 1.34+dfsg-1build1
	22.10 kinetic	Fixed 1.34+dfsg-1build1
	22.04 LTS jammy	Fixed 1.34+dfsg-1build1
	21.10 impish	Fixed 1.34+dfsg-1build1
	21.04 hirsute	Fixed 1.34+dfsg-1build1
	20.10 groovy	Ignored end of life
	20.04 LTS focal	Fixed 1.30+dfsg-7ubuntu0.20.04.2
	18.04 LTS bionic	Fixed 1.29b-2ubuntu0.3
	16.04 LTS xenial	Fixed 1.28-2.1ubuntu0.2+esm1 Ubuntu Pro
	14.04 LTS trusty	Fixed 1.27.1-1ubuntu0.1+esm2 Ubuntu Pro

Get expanded security coverage with Ubuntu Pro

Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use.

Get Ubuntu Pro

Notes

sbeattie

the tar command failed to free memory. As this is a command line tool denial of service, this has been rated as priority low

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=d9d

Severity score breakdown

Parameter	Value
Base score	3.3 · Low
Attack vector	Local
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	Low
Vector	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

References

Related Ubuntu Security Notices (USN)

USN-5329-1
tar vulnerability
15 March 2022