Dillo: User-assisted execution of arbitrary code

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200908-10 / dillo
Release Date	August 18, 2009
Latest Revision	August 18, 2009: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
www-client/dillo	< 2.1.1	>= 2.1.1	All supported architectures

Related bugreports: #276432

Synopsis

An integer overflow in the PNG handling of Dillo might result in the remote execution of arbitrary code.

2. Impact Information

Background

Dillo is a graphical web browser known for its speed and small footprint.

Description

Tilei Wang reported an integer overflow in the Png_datainfo_callback() function, possibly leading to a heap-based buffer overflow.

Impact

A remote attacker could entice a user to open an HTML document containing a specially crafted, large PNG image, possibly resulting in the execution of arbitrary code with the privileges of the user running the application.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Dillo users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=www-client/dillo-2.1.1"

4. References

CVE-2009-2294

Page updated August 18, 2009

Summary: This is a Gentoo Linux Security Advisory

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