iscsi-target: Reject mutual authentication with reflected CHAP_C

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commit 1d2b60a554 upstream.

This patch adds an explicit check in chap_server_compute_md5() to ensure
the CHAP_C value received from the initiator during mutual authentication
does not match the original CHAP_C provided by the target.

This is in line with RFC-3720, section 8.2.1:

   Originators MUST NOT reuse the CHAP challenge sent by the Responder
   for the other direction of a bidirectional authentication.
   Responders MUST check for this condition and close the iSCSI TCP
   connection if it occurs.

Reported-by: Tejas Vaykole <tejas.vaykole@calsoftinc.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Nicholas Bellinger 2014-06-05 18:08:57 -07:00 • committed by Greg Kroah-Hartman

parent af653349f7

commit 50db1fe232

1 changed files with 10 additions and 0 deletions

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drivers/target/iscsi/iscsi_target_auth.c

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