XChat: malformed dcc send request denial of service
Gentoo Linux Security Advisory
||GLSA 200312-06 / xchat
||December 14, 2003
||December 14, 2003: 01
All supported architectures
A bug in XChat could allow malformed dcc send requests to cause a denial of
XChat is a multiplatform IRC client.
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.
A malformed DCC packet sent by a remote attacker can cause XChat to crash.
There is no known workaround at this time.
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:
Code Listing 3.1: Resolution
# 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