Description
In the Linux kernel, the following vulnerability has been resolved: sctp: fix uninit-value in __sctp_rcv_asconf_lookup() __sctp_rcv_asconf_lookup() in net/sctp/input.c only checks that the ASCONF chunk can hold the ADDIP header and a parameter header, then calls af->from_addr_param(), which reads the full address (16 bytes for IPv6) trusting the parameter's declared length. An unauthenticated peer can send a truncated trailing ASCONF chunk that declares an IPv6 address parameter but stops after the 4-byte parameter header; reached from the no-association lookup path, from_addr_param() then reads uninitialized bytes past the parameter. Impact: an unauthenticated SCTP peer makes the receive path read up to 16 bytes of uninitialized memory past a truncated ASCONF address parameter. The sibling __sctp_rcv_init_lookup() bounds parameters with sctp_walk_params(); this path open-codes the fetch and omits the bound. Verify the whole address parameter lies within the chunk before from_addr_param() reads it, the same class of fix as commit 51e5ad549c43 ("net: sctp: fix KMSAN uninit-value in sctp_inq_pop").
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
df21857714398acb8b24a8bb5a6d2286dd9c59ef to < 446e0ecd845abc394b24ae2030a883572bec9d16affecteddf21857714398acb8b24a8bb5a6d2286dd9c59ef to < 928dd94db23e8ba340f83d68f7f24d831b7a4426affecteddf21857714398acb8b24a8bb5a6d2286dd9c59ef to < d796cfd06074b579d265b28401306cadd30db945affecteddf21857714398acb8b24a8bb5a6d2286dd9c59ef to < 8ce96f1182644079249a24ac7e2ffc32e0301a46affecteddf21857714398acb8b24a8bb5a6d2286dd9c59ef to < d6bd0bb7697ea8c0387b0d9d973453f479017b23affecteddf21857714398acb8b24a8bb5a6d2286dd9c59ef to < f76a8b323e28e0951f979dbef20a7496383c47dfaffecteddf21857714398acb8b24a8bb5a6d2286dd9c59ef to < 8e86817b8af4d552f3c6fe04ca52bb0c8c57411daffecteddf21857714398acb8b24a8bb5a6d2286dd9c59ef to < f8373d7090b745728de66308deeecc67e8d319ceaffected
Linux Linux
Default version status: affected
2.6.25affected0 to < 2.6.25unaffected5.10.259 to ≤ 5.10.*unaffected5.15.210 to ≤ 5.15.*unaffected6.1.176 to ≤ 6.1.*unaffected6.6.143 to ≤ 6.6.*unaffected6.12.94 to ≤ 6.12.*unaffected6.18.36 to ≤ 6.18.*unaffected7.0.13 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/446e0ecd845abc394b24ae2030a883572bec9d16 ↗
- https://git.kernel.org/stable/c/928dd94db23e8ba340f83d68f7f24d831b7a4426 ↗
- https://git.kernel.org/stable/c/d796cfd06074b579d265b28401306cadd30db945 ↗
- https://git.kernel.org/stable/c/8ce96f1182644079249a24ac7e2ffc32e0301a46 ↗
- https://git.kernel.org/stable/c/d6bd0bb7697ea8c0387b0d9d973453f479017b23 ↗
- https://git.kernel.org/stable/c/f76a8b323e28e0951f979dbef20a7496383c47df ↗
- https://git.kernel.org/stable/c/8e86817b8af4d552f3c6fe04ca52bb0c8c57411d ↗
- https://git.kernel.org/stable/c/f8373d7090b745728de66308deeecc67e8d319ce ↗
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html ↗