libpng 1.6.1 through 1.6.7 contain a null-pointer dereference vulnerability

Overview

libpng versions 1.6.1 through 1.6.7 fail to reject colormapped images with empty palettes, leading to a null-pointer dereference (crash) in png_do_expand_palette().

Description

The PNG Development Group has reported that “libpng versions 1.6.1 through 1.6.7 fail to reject colormapped images with empty palettes, leading to a null-pointer dereference (crash) in png_do_expand_palette()”.

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Impact

An attacker may be able to exploit an application that uses libpng to execute arbitrary code or cause a denial-of-service.

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Solution

Apply an Update

libpng 1.6.8 has addressed this vulnerability.

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Vendor Information

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libpng Affected

Updated: January 09, 2014

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

CVSS Metrics

Group	Score	Vector
Base	3.3	AV:L/AC:M/Au:N/C:P/I:P/A:N
Temporal	2.4	E:U/RL:OF/RC:C
Environmental	2.5	CDP:ND/TD:H/CR:ND/IR:ND/AR:ND

References

<http://www.libpng.org/pub/png/libpng.html&gt;

Acknowledgements

Thanks to Glenn Randers-Pehrson for reporting this vulnerability.

This document was written by Jared Allar.

Other Information

CVE IDs:	CVE-2013-6954
Date Public:	2013-12-19 Date First Published: