CVE-2021-27347

Publication date 10 June 2021

Last updated 26 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Use after free in lzma_decompress_buf function in stream.c in Irzip 0.631 allows attackers to cause Denial of Service (DoS) via a crafted compressed file.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
lrzip	25.10 questing	Not affected
	25.04 plucky	Not affected
	24.10 oracular	Not affected
	24.04 LTS noble	Not affected
	23.10 mantic	Not affected
	23.04 lunar	Not affected
	22.10 kinetic	Not affected
	22.04 LTS jammy	Not affected
	21.10 impish	Ignored end of life
	21.04 hirsute	Ignored end of life
	20.10 groovy	Ignored end of life
	20.04 LTS focal	Fixed 0.631+git180528-1+deb10u1build0.20.04.1
	18.04 LTS bionic	Fixed 0.631-1+deb9u3build0.18.04.1
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Vulnerable

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

References

Related Ubuntu Security Notices (USN)

USN-5840-1
Long Range ZIP vulnerabilities
2 February 2023