Description
In the Linux kernel, the following vulnerability has been resolved: sctp: auth: verify auth requirement when auth_chunk is NULL sctp_auth_chunk_verify() returns true unconditionally when chunk->auth_chunk is NULL, silently skipping authentication. This is incorrect when: 1. skb_clone() failed in the BH receive path, leaving auth_chunk NULL. In sctp_endpoint_bh_rcv() asoc is NULL for new connections, so the early sctp_auth_recv_cid() check cannot catch this. 2. No AUTH chunk precedes COOKIE-ECHO, so skb_clone() is never called and auth_chunk remains NULL. Fix by checking sctp_auth_recv_cid() when auth_chunk is NULL: if authentication is required, return false to drop the chunk; otherwise continue normally.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
bbd0d59809f923ea2b540cbd781b32110e249f6e to < a129792b3aef15002746c13522781d92ed3522c3affectedbbd0d59809f923ea2b540cbd781b32110e249f6e to < 5a022ac51ad83b4ce6c898f4b9eefc65bd26b247affectedbbd0d59809f923ea2b540cbd781b32110e249f6e to < 6caf0e8590c0bf05a76b0d387726adf3a6f3725caffectedbbd0d59809f923ea2b540cbd781b32110e249f6e to < ec2e157fc9678a9bc411305a25aec3fd337d7efbaffectedbbd0d59809f923ea2b540cbd781b32110e249f6e to < 28c5fdce9dd955d2baf5e28987819b6d7cfaf646affectedbbd0d59809f923ea2b540cbd781b32110e249f6e to < 18957373920caf5cdaf5cf32e5d1d7a99ca7700aaffectedbbd0d59809f923ea2b540cbd781b32110e249f6e to < 83f5031f2a6a49d696eb4cc0898345d12f9c6451affectedbbd0d59809f923ea2b540cbd781b32110e249f6e to < 8e04823c120b376ef7dab14b60ebf6823aa16c14affected
Linux Linux
Default version status: affected
2.6.24affected0 to < 2.6.24unaffected5.10.265 to ≤ 5.10.*unaffected5.15.216 to ≤ 5.15.*unaffected6.1.183 to ≤ 6.1.*unaffected6.6.148 to ≤ 6.6.*unaffected6.12.101 to ≤ 6.12.*unaffected6.18.42 to ≤ 6.18.*unaffected7.1.6 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/a129792b3aef15002746c13522781d92ed3522c3 ↗
- https://git.kernel.org/stable/c/5a022ac51ad83b4ce6c898f4b9eefc65bd26b247 ↗
- https://git.kernel.org/stable/c/6caf0e8590c0bf05a76b0d387726adf3a6f3725c ↗
- https://git.kernel.org/stable/c/ec2e157fc9678a9bc411305a25aec3fd337d7efb ↗
- https://git.kernel.org/stable/c/28c5fdce9dd955d2baf5e28987819b6d7cfaf646 ↗
- https://git.kernel.org/stable/c/18957373920caf5cdaf5cf32e5d1d7a99ca7700a ↗
- https://git.kernel.org/stable/c/83f5031f2a6a49d696eb4cc0898345d12f9c6451 ↗
- https://git.kernel.org/stable/c/8e04823c120b376ef7dab14b60ebf6823aa16c14 ↗