Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected df21857714398acb8b24a8bb5a6d2286dd9c59ef before 446e0ecd845abc394b24ae2030a883572bec9d16; affected df21857714398acb8b24a8bb5a6d2286dd9c59ef before 928dd94db23e8ba340f83d68f7f24d831b7a4426; affected df21857714398acb8b24a8bb5a6d2286dd9c59ef before d796cfd06074b579d265b28401306cadd30db945; affected df21857714398acb8b24a8bb5a6d2286dd9c59ef before 8ce96f1182644079249a24ac7e2ffc32e0301a46; affected df21857714398acb8b24a8bb5a6d2286dd9c59ef before d6bd0bb7697ea8c0387b0d9d973453f479017b23; affected df21857714398acb8b24a8bb5a6d2286dd9c59ef before f76a8b323e28e0951f979dbef20a7496383c47df; affected df21857714398acb8b24a8bb5a6d2286dd9c59ef before 8e86817b8af4d552f3c6fe04ca52bb0c8c57411d; affected df21857714398acb8b24a8bb5a6d2286dd9c59ef before f8373d7090b745728de66308deeecc67e8d319ce |
| Linux / Linux | affected 2.6.25; unaffected 0 before 2.6.25; unaffected 5.10.259 through 5.10.*; unaffected 5.15.210 through 5.15.*; unaffected 6.1.176 through 6.1.*; unaffected 6.6.143 through 6.6.*; unaffected 6.12.94 through 6.12.*; unaffected 6.18.36 through 6.18.*; unaffected 7.0.13 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
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
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.