xine-lib: VCD MRL buffer overflow

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200408-18 / xine-lib
Release Date	August 17, 2004
Latest Revision	May 22, 2006: 02
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
media-libs/xine-lib	<= 1_rc5-r2	>= 1_rc5-r3	All supported architectures

Related bugreports: #59948

Synopsis

xine-lib contains an exploitable buffer overflow in the VCD handling code

2. Impact Information

Background

xine-lib is a multimedia library which can be utilized to create multimedia frontends.

Description

xine-lib contains a bug where it is possible to overflow the vcd:// input source identifier management buffer through carefully crafted playlists.

Impact

An attacker may construct a carefully-crafted playlist file which will cause xine-lib to execute arbitrary code with the permissions of the user. In order to conform with the generic naming standards of most Unix-like systems, playlists can have extensions other than .asx (the standard xine playlist format), and made to look like another file (MP3, AVI, or MPEG for example). If an attacker crafts a playlist with a valid header, they can insert a VCD playlist line that can cause a buffer overflow and possible shellcode execution.

3. Resolution Information

Workaround

There is no known workaround at this time. All users are encouraged to upgrade to the latest available version of xine-lib.

Resolution

All xine-lib users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge sync

# emerge -pv ">=media-libs/xine-lib-1_rc5-r3"
# emerge ">=media-libs/xine-lib-1_rc5-r3"

4. References

Page updated August 17, 2004

Summary: This is a Gentoo Linux Security Advisory

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