by Kastro
Paper/Archive/CVE-2023-52442

CVE-2023-52442

Linux Linux — ksmbd: validate session id and tree id in compound request

EPSS 30%CVSS 9.1
critical.is priorityof 100
47
CVSS 9.1 (CNA)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 98.2.982 × 2019.6No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate session id and tree id in compound request `smb2_get_msg()` in smb2_get_ksmbd_tcon() and smb2_check_user_session() will always return the first request smb2 header in a compound request. if `SMB2_TREE_CONNECT_HE` is the first command in compound request, will return 0, i.e. The tree id check is skipped. This patch use ksmbd_req_buf_next() to get current command in compound.

Affected

ProductAffectedFixed inSource
Linux0626e6641f6b467447c81dd7678a69c66f7746cf – < 017d85c94f02090a87f4a473dbe0d6ee0da72693017d85c94f02090a87f4a473dbe0d6ee0da72693CNA
Linux0626e6641f6b467447c81dd7678a69c66f7746cf – < becb5191d1d5fdfca0198a2e37457bbbf4fe266fbecb5191d1d5fdfca0198a2e37457bbbf4fe266fCNA
Linux0626e6641f6b467447c81dd7678a69c66f7746cf – < 4c2b350b2e269e3fd17bbfa42de1b42775b777ac4c2b350b2e269e3fd17bbfa42de1b42775b777acCNA
Linux0626e6641f6b467447c81dd7678a69c66f7746cf – < 3df0411e132ee74a87aa13142dfd2b190275332e3df0411e132ee74a87aa13142dfd2b190275332eCNA
Linux5.155.15.145CNA

Scores by source

Linux (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CISA ADP5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: partial

References

refgit.kernel.org/stable/c/017d85c94f02090a87f4a473dbe0d6ee0da72693refgit.kernel.org/stable/c/becb5191d1d5fdfca0198a2e37457bbbf4fe266frefgit.kernel.org/stable/c/4c2b350b2e269e3fd17bbfa42de1b42775b777acrefgit.kernel.org/stable/c/3df0411e132ee74a87aa13142dfd2b190275332e