| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2023-52442: ksmbd: validate session id and tree id in compound request |
| |
| Description |
| =========== |
| |
| 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. |
| |
| The Linux kernel CVE team has assigned CVE-2023-52442 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 5.15.145 with commit 017d85c94f02090a87f4a473dbe0d6ee0da72693 |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.1.53 with commit becb5191d1d5fdfca0198a2e37457bbbf4fe266f |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.4.16 with commit 4c2b350b2e269e3fd17bbfa42de1b42775b777ac |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.5 with commit 3df0411e132ee74a87aa13142dfd2b190275332e |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2023-52442 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| fs/smb/server/smb2pdu.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/017d85c94f02090a87f4a473dbe0d6ee0da72693 |
| https://git.kernel.org/stable/c/becb5191d1d5fdfca0198a2e37457bbbf4fe266f |
| https://git.kernel.org/stable/c/4c2b350b2e269e3fd17bbfa42de1b42775b777ac |
| https://git.kernel.org/stable/c/3df0411e132ee74a87aa13142dfd2b190275332e |
