Red Hat Bugzilla – Bug 142958
CAN-2004-1137 IGMP flaws
Last modified: 2015-01-04 17:14:04 EST
isec.pl reported to vendor-sec some flaws in igmp handling which could
local user to cause a kernel deadlock or crash. They also say it's
you could gain privileges using this flaw. Looks like only 2.4.22 and
affected, however RHEL3 is vulnerable due to a backport of the code in
Patch available in bug 142670
This issue does have the potential to be remotely exploitable.
From the advisory
(3) The igmp_marksources() function from the network module is called
in the context of an IGMP group query received from the network and
suffers from an out of bound read access to kernel memory. It
happens because the received IGMP message's parameters are not
validated properly. This flaw is remotely exploitable on Linux
machines with multicasting support if and only if an application has
bound a multicast socket.
This is not a terribly common situation, so it won't alter the
severity of the issue.
This issue should also affect FC2
fixed in latest updates (or actually, I think it was in the previous ones..)