Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: sctp: handle the error returned from sctp_auth_asoc_init_active_key When it returns an error from sctp_auth_asoc_init_active_key(), the active_key is actually not updated. The old sh_key will be freeed while it's still used as active key in asoc. Then an use-after-free will be triggered when sending patckets, as found by syzbot: sctp_auth_shkey_hold+0x22/0xa0 net/sctp/auth.c:112 sctp_set_owner_w net/sctp/socket.c:132 [inline] sctp_sendmsg_to_asoc+0xbd5/0x1a20 net/sctp/socket.c:1863 sctp_sendmsg+0x1053/0x1d50 net/sctp/socket.c:2025 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:819 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:734 This patch is to fix it by not replacing the sh_key when it returns errors from sctp_auth_asoc_init_active_key() in sctp_auth_set_key(). For sctp_auth_set_active_key(), old active_key_id will be set back to asoc->active_key_id when the same thing happens.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 50b57223da67653c61e405d0a7592355cfe4585e before b8fa99a3a11bdd77fef6b4a97f1021eb30b5ba40; affected b60461696a0b0fdaf240bc365b7983698f88ded2 before 382ff44716603a54f5fd238ddec6a2468e217612; affected 8eb225873246312660ccd68296959a7b213d0cdd before f65955340e0044f5c41ac799a01698ac7dee8a4e; affected 58acd10092268831e49de279446c314727101292 before 19d636b663e0e92951bba5fced929ca7fd25c552; affected 58acd10092268831e49de279446c314727101292 before 0f90099d18e3abdc01babf686f41f63fe04939c1; affected 58acd10092268831e49de279446c314727101292 before 3b0fcf5e29c0940e1169ce9c44f73edd98bdf12d; affected 58acd10092268831e49de279446c314727101292 before 022152aaebe116a25c39818a07e175a8cd3c1e11; affected c1de376423a7759bf4fa25d6a038a4c1e035c9e1; affected 4.19.199 before 4.19.262; affected 5.4.136 before 5.4.220; affected 5.10.54 before 5.10.150; affected 5.13.6 before 5.14 |
| Linux / Linux | affected 5.14; unaffected 0 before 5.14; unaffected 4.19.262 through 4.19.*; unaffected 5.4.220 through 5.4.*; unaffected 5.10.150 through 5.10.*; unaffected 5.15.75 through 5.15.*; unaffected 5.19.17 through 5.19.*; unaffected 6.0.3 through 6.0.*; unaffected 6.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/b8fa99a3a11bdd77fef6b4a97f1021eb30b5ba40
- https://git.kernel.org/stable/c/382ff44716603a54f5fd238ddec6a2468e217612
- https://git.kernel.org/stable/c/f65955340e0044f5c41ac799a01698ac7dee8a4e
- https://git.kernel.org/stable/c/19d636b663e0e92951bba5fced929ca7fd25c552
- https://git.kernel.org/stable/c/0f90099d18e3abdc01babf686f41f63fe04939c1
- https://git.kernel.org/stable/c/3b0fcf5e29c0940e1169ce9c44f73edd98bdf12d
- https://git.kernel.org/stable/c/022152aaebe116a25c39818a07e175a8cd3c1e11