exiftags: Multiple vulnerabilities

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200712-17 / exiftags
Release Date	December 29, 2007
Latest Revision	December 29, 2007: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
media-gfx/exiftags	< 1.01	>= 1.01	All supported architectures

Related bugreports: #202354

Synopsis

Multiple vulnerabilities in exiftags possibly allow for the execution of arbitrary code or a Denial of Service.

2. Impact Information

Background

exiftags is a library and set of tools for parsing, editing and saving Exif metadata from images. Exif, the Exchangeable image file format, specifies the addition of metadata tags to JPEG, TIFF and RIFF files.

Description

Meder Kydyraliev (Google Security) discovered that Exif metadata is not properly sanitized before being processed, resulting in illegal memory access in the postprop() and other functions (CVE-2007-6354). He also discovered integer overflow vulnerabilities in the parsetag() and other functions (CVE-2007-6355) and an infinite recursion in the readifds() function caused by recursive IFD references (CVE-2007-6356).

Impact

An attacker could entice the user of an application making use of exiftags or an application included in exiftags to load an image file with specially crafted Exif tags, possibly resulting in the execution of arbitrary code with the privileges of the user running the application or a Denial of Service.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All exiftags users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=media-gfx/exiftags-1.01"

4. References

Page updated December 29, 2007

Summary: This is a Gentoo Linux Security Advisory

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