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| author |   Dan Rosenberg <drosenberg@vsecurity.com> | 2010-10-01 11:51:47 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2010-10-03 21:58:49 -0700 |
| commit | 51e97a12bef19b7e43199fc153cf9bd5f2140362 (patch) | |
| tree | 1ac12f07ab40e28d3ec29d04384a17c3e3b33826 /net/ipv4 | |
| parent | sctp: prevent reading out-of-bounds memory (diff) | |
| download | linux-dev-51e97a12bef19b7e43199fc153cf9bd5f2140362.tar.xz linux-dev-51e97a12bef19b7e43199fc153cf9bd5f2140362.zip | |
sctp: Fix out-of-bounds reading in sctp_asoc_get_hmac()
The sctp_asoc_get_hmac() function iterates through a peer's hmac_ids
array and attempts to ensure that only a supported hmac entry is
returned. The current code fails to do this properly - if the last id
in the array is out of range (greater than SCTP_AUTH_HMAC_ID_MAX), the
id integer remains set after exiting the loop, and the address of an
out-of-bounds entry will be returned and subsequently used in the parent
function, causing potentially ugly memory corruption. This patch resets
the id integer to 0 on encountering an invalid id so that NULL will be
returned after finishing the loop if no valid ids are found.
Signed-off-by: Dan Rosenberg <drosenberg@vsecurity.com>
Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
0 files changed, 0 insertions, 0 deletions