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:
# 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.