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Published: 29 November 2019

cabextract before 1.6 does not properly check for leading slashes when extracting files, which allows remote attackers to conduct absolute directory traversal attacks via a malformed UTF-8 character that is changed to a UTF-8 encoded slash.

From the Ubuntu Security Team

It was discovered that cabextract incorrectly handled certain malformed CAB files. A remote attacker could use this issue to write to arbitrary files on the host filesystem.



Cvss 3 Severity Score


Score breakdown


Package Release Status
Launchpad, Ubuntu, Debian
artful Not vulnerable
bionic Not vulnerable
cosmic Not vulnerable
disco Not vulnerable
eoan Not vulnerable
focal Not vulnerable
lucid Ignored
(end of life)
precise Ignored
(end of life)
Released (1.4-4ubuntu0.1~esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
Released (1.6-1)
utopic Ignored
(end of life)
vivid Ignored
(end of life)
wily Not vulnerable
xenial Not vulnerable
yakkety Not vulnerable
zesty Not vulnerable
groovy Not vulnerable
hirsute Not vulnerable
impish Not vulnerable
jammy Not vulnerable

Severity score breakdown

Parameter Value
Base score 5.3
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact Low
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N