GLSA 200312-06: XChat: malformed dcc send request denial of service

http://security.gentoo.org/

Severity:	translation missing: en, label_glsa_medium
Title:	XChat: malformed dcc send request denial of service
Date:	12/14/2003
Bugs:	#35623
ID:	200312-06

Synopsis

A bug in XChat could allow malformed dcc send requests to cause a denial of service.

Background

XChat is a multiplatform IRC client.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-irc/xchat	== 2.0.6	>= 2.0.6-r1	All supported architectures

Description

There is a remotely exploitable bug in XChat 2.0.6 that could lead to a denial of service attack. Gentoo wishes to thank lloydbates for discovering this bug, as well as jcdutton and rac for submitting patches to fix the bug.

Impact

A malformed DCC packet sent by a remote attacker can cause XChat to crash.

Workaround

There is no known workaround at this time.

Resolution

For Gentoo users, xchat-2.0.6 was marked ~arch (unstable) for most architectures. Since it was never marked as stable in the portage tree, only xchat users who have explictly added the unstable keyword to ACCEPT_KEYWORDS are affected. Users may updated affected machines to the patched version of xchat using the following commands:

    # emerge sync
    # emerge -pv '>=net-irc/xchat-2.0.6-r1'
    # emerge '>=net-irc/xchat-2.0.6-r1'
    # emerge clean

This assumes that users are running with ACCEPT_KEYWORDS enabled for their architecture.

References

XChat Announcement

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200312-06.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.