[ASA-202012-2] cimg: arbitrary code execution

[Remi Gacogne]

Arch Linux Security Advisory ASA-202012-2
=========================================

Severity: Medium
Date    : 2020-12-05
CVE-ID  : CVE-2020-25693
Package : cimg
Type    : arbitrary code execution
Remote  : No
Link    : https://security.archlinux.org/AVG-1318

Summary
=======

The package cimg before version 2.9.4-1 is vulnerable to arbitrary code
execution.

Resolution
==========

Upgrade to 2.9.4-1.

# pacman -Syu "cimg>=2.9.4-1"

The problem has been fixed upstream in version 2.9.4.

Workaround
==========

None.

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

A flaw was found in CImg in versions prior to 2.9.3. Integer overflows
leading to heap buffer overflows in load_pnm() can be triggered by a
specially crafted input file processed by CImg, which can lead to an
impact to application availability or data integrity.

Impact
======

An attacker might be able to execute arbitrary code via a crafted PNM
file.

References
==========

https://github.com/dtschump/CImg/pull/295
https://github.com/dtschump/CImg/commit/7db6d08355d09414d407e26aac10bb5825343e3a
https://security.archlinux.org/CVE-2020-25693

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