Bugzilla – Bug 1220184
VUL-0: CVE-2023-52442: kernel-source,kernel-source-azure,kernel-source-rt: invalid session id and tree id in compound request
Last modified: 2024-02-23 08:18:09 UTC
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. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-52442 https://git.kernel.org/stable/c/4c2b350b2e269e3fd17bbfa42de1b42775b777ac https://git.kernel.org/stable/c/becb5191d1d5fdfca0198a2e37457bbbf4fe266f https://www.cve.org/CVERecord?id=CVE-2023-52442 https://git.kernel.org/stable/c/017d85c94f02090a87f4a473dbe0d6ee0da72693 https://git.kernel.org/stable/c/3df0411e13 return 0, i.e. The tree id check is skipped. This patch use ksmbd_req_buf_next() to get current command in compound. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-52442 https://git.kernel.org/stable/c/4c2b350b2e269e3fd17bbfa42de1b42775b777ac https://git.kernel.org/stable/c/becb5191d1d5fdfca0198a2e37457bbbf4fe266f https://www.cve.org/CVERecord?id=CVE-2023-52442 https://git.kernel.org/stable/c/017d85c94f02090a87f4a473dbe0d6ee0da72693 https://git.kernel.org/stable/c/3df0411e132ee74a87aa13142dfd2b190275332e
ksmbd only built on stable, which is already fixed. So I guess we're good
I checked SLE11-SP4-LTSS, SLE15-SP5, SLE15-SP6. We did NOT enable CONFIG_SMB_SERVER since long time ago. And, stable (Tumbleweed) kernel set CONFIG_SMB_SERVER=m, but ksmbd is NOT in supported.config. So, this CVE of ksmbd does not affect SLE/openSUSE. Reset assigner.
Thanks Joey, closing