[ASA-202107-26] python-pillow: arbitrary code execution

[Jonas Witschel]

Arch Linux Security Advisory ASA-202107-26
==========================================

Severity: Medium
Date    : 2021-07-14
CVE-ID  : CVE-2021-34552
Package : python-pillow
Type    : arbitrary code execution
Remote  : Yes
Link    : https://security.archlinux.org/AVG-2150

Summary
=======

The package python-pillow before version 8.3.0-1 is vulnerable to
arbitrary code execution.

Resolution
==========

Upgrade to 8.3.0-1.

# pacman -Syu "python-pillow>=8.3.0-1"

The problem has been fixed upstream in version 8.3.0.

Workaround
==========

None.

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

Pillow through 8.2.0 allows an attacker to pass controlled parameters
directly into a convert function to trigger a buffer overflow in
Convert.c.

Impact
======

Converting a crafted image file could lead to arbitrary code execution.

References
==========

https://pillow.readthedocs.io/en/stable/releasenotes/8.3.0.html#buffer-overflow
https://github.com/python-pillow/Pillow/pull/5567
https://github.com/python-pillow/Pillow/commit/518ee3722a99d7f7d890db82a20bd81c1c0327fb
https://security.archlinux.org/CVE-2021-34552
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