Subject: [ASA-202009-2] ark: arbitrary filesystem access

Arch Linux Security Advisory ASA-202009-2
=========================================

Severity: High
Date    : 2020-09-03
CVE-ID  : CVE-2020-24654
Package : ark
Type    : arbitrary filesystem access
Remote  : No
Link    : https://security.archlinux.org/AVG-1216

Summary
=======

The package ark before version 20.08.0-2 is vulnerable to arbitrary
filesystem access.

Resolution
==========

Upgrade to 20.08.0-2.

# pacman -Syu "ark>=20.08.0-2"

The problem has been fixed upstream but no release is available yet.

Workaround
==========

None.

Description
===========

In KDE Ark before 20.08.1, a crafted TAR archive with symlinks can
install files outside the extraction directory, as demonstrated by a
write operation to a user's home directory.

Impact
======

An attacker can overwrite local files by tricking a legitimate user
into extracting a specially crafted TAR archive.

References
==========

https://kde.org/info/security/advisory-20200827-1.txt
https://invent.kde.org/utilities/ark/-/commit/8bf8c5ef07b0ac5e914d752681e470dea403a5bd
https://security.archlinux.org/CVE-2020-24654