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CVE request: kernel: sctp: Fix oops when INIT-ACK indicates that peer doesn't support AUTH
From: Eugene Teo <eteo () redhat com>
Date: Wed, 08 Oct 2008 11:53:10 +0800
This was committed in upstream kernel recently.
"[PATCH] sctp: Fix oops when INIT-ACK indicates that peer doesn't
If INIT-ACK is received with SupportedExtensions parameter which
indicates that the peer does not support AUTH, the packet will be
silently ignore, and sctp_process_init() do cleanup all of the
transports in the association. When T1-Init timer is expires, OOPS
happen while we try to choose a different init transport.
The solution is to only clean up the non-active transports, i.e
the ones that the peer added. However, that introduces a problem
with sctp_connectx(), because we don't mark the proper state for
the transports provided by the user. So, we'll simply mark
user-provided transports as ACTIVE. That will allow INIT
retransmissions to work properly in the sctp_connectx() context
and prevent the crash."
Upstream commit: add52379dde2e5300e2d574b172e62c6cf43b3d3
This can be triggered if the SCTP connection between both ends have
mis-matched settings, i.e. one end with AUTH extensions enabled, and the
other end with AUTH extension disabled. This requires a CVE name.
Eugene Teo / Red Hat Security Response Team
- CVE request: kernel: sctp: Fix oops when INIT-ACK indicates that peer doesn't support AUTH Eugene Teo (Oct 08)