sctp: fix a potential overflow in sctp_ifwdtsn_skip
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.2epss 0.4%
exploitation probability
0.4%top 72% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
sctp: fix a potential overflow in sctp_ifwdtsn_skip
Currently, when traversing ifwdtsn skips with _sctp_walk_ifwdtsn, it only
checks the pos against the end of the chunk. However, the data left for
the last pos may be < sizeof(struct sctp_ifwdtsn_skip), and dereference
it as struct sctp_ifwdtsn_skip may cause coverflow.
This patch fixes it by checking the pos against "the end of the chunk -
sizeof(struct sctp_ifwdtsn_skip)" in sctp_ifwdtsn_skip, similar to
sctp_fwdtsn_skip.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/32832a2caf82663870126c5186cf8f86c8b2a649https://git.kernel.org/stable/c/4fbd094d4131a10d06a45d64158567052a35b3f4https://git.kernel.org/stable/c/5c9367ac5a22d71841bcd00130f9146c9b227d57https://git.kernel.org/stable/c/6109f5b13ce3e3e537db6f18976ec0e9118d1c6fhttps://git.kernel.org/stable/c/79b28f42214a3d0d6a8c514db3602260bd5d6cb5https://git.kernel.org/stable/c/ad831a7079c99c01e801764b53bc9997c2e9c0f7https://git.kernel.org/stable/c/ad988e9b5ff04607e624a459209e8c2d0c15fc73