Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: smb: client: require a full NFS mode SID before reading mode bits parse_dacl() treats an ACE SID matching sid_unix_NFS_mode as an NFS mode SID and reads sid.sub_auth[2] to recover the mode bits. That assumes the ACE carries three subauthorities, but compare_sids() only compares min(a, b) subauthorities. A malicious server can return an ACE with num_subauth = 2 and sub_auth[] = {88, 3}, which still matches sid_unix_NFS_mode and then drives the sub_auth[2] read four bytes past the end of the ACE. Require num_subauth >= 3 before treating the ACE as an NFS mode SID. This keeps the fix local to the special-SID mode path without changing compare_sids() semantics for the rest of cifsacl.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected e2f8fbfb8d09c06decde162090fac3ee220aa280 before 23b54d6cc3ef30a51d984dc74364f24039ae2ecb; affected e2f8fbfb8d09c06decde162090fac3ee220aa280 before 1592a6cd6f653f2d24572a6976c7a775b19f4940; affected e2f8fbfb8d09c06decde162090fac3ee220aa280 before 8bd4cad3f458d11650d51c2d24b03fb1770ae6cc; affected e2f8fbfb8d09c06decde162090fac3ee220aa280 before b53b8e98c23310294fc45fc686db5ee860311896; affected e2f8fbfb8d09c06decde162090fac3ee220aa280 before c8eef12af1cc73031639ea7cf16e0b10e2536b0b; affected e2f8fbfb8d09c06decde162090fac3ee220aa280 before 38a69f08ee82c450d3e4168707fff2e317dc3ff7; affected e2f8fbfb8d09c06decde162090fac3ee220aa280 before f8488c07bea2431ee12a6067d736578064fa46b4; affected e2f8fbfb8d09c06decde162090fac3ee220aa280 before 2757ad3e4b6f9e0fed4c7739594e702abc5cab21 |
| Linux / Linux | affected 5.4; unaffected 0 before 5.4; unaffected 5.10.259 through 5.10.*; unaffected 5.15.210 through 5.15.*; unaffected 6.1.175 through 6.1.*; unaffected 6.6.136 through 6.6.*; unaffected 6.12.84 through 6.12.*; unaffected 6.18.25 through 6.18.*; unaffected 7.0.2 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/23b54d6cc3ef30a51d984dc74364f24039ae2ecb
- https://git.kernel.org/stable/c/1592a6cd6f653f2d24572a6976c7a775b19f4940
- https://git.kernel.org/stable/c/8bd4cad3f458d11650d51c2d24b03fb1770ae6cc
- https://git.kernel.org/stable/c/b53b8e98c23310294fc45fc686db5ee860311896
- https://git.kernel.org/stable/c/c8eef12af1cc73031639ea7cf16e0b10e2536b0b
- https://git.kernel.org/stable/c/38a69f08ee82c450d3e4168707fff2e317dc3ff7
- https://git.kernel.org/stable/c/f8488c07bea2431ee12a6067d736578064fa46b4
- https://git.kernel.org/stable/c/2757ad3e4b6f9e0fed4c7739594e702abc5cab21
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.