| 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-2021-46960: cifs: Return correct error code from smb2_get_enc_key |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| cifs: Return correct error code from smb2_get_enc_key |
| |
| Avoid a warning if the error percolates back up: |
| |
| [440700.376476] CIFS VFS: \\otters.example.com crypt_message: Could not get encryption key |
| [440700.386947] ------------[ cut here ]------------ |
| [440700.386948] err = 1 |
| [440700.386977] WARNING: CPU: 11 PID: 2733 at /build/linux-hwe-5.4-p6lk6L/linux-hwe-5.4-5.4.0/lib/errseq.c:74 errseq_set+0x5c/0x70 |
| ... |
| [440700.397304] CPU: 11 PID: 2733 Comm: tar Tainted: G OE 5.4.0-70-generic #78~18.04.1-Ubuntu |
| ... |
| [440700.397334] Call Trace: |
| [440700.397346] __filemap_set_wb_err+0x1a/0x70 |
| [440700.397419] cifs_writepages+0x9c7/0xb30 [cifs] |
| [440700.397426] do_writepages+0x4b/0xe0 |
| [440700.397444] __filemap_fdatawrite_range+0xcb/0x100 |
| [440700.397455] filemap_write_and_wait+0x42/0xa0 |
| [440700.397486] cifs_setattr+0x68b/0xf30 [cifs] |
| [440700.397493] notify_change+0x358/0x4a0 |
| [440700.397500] utimes_common+0xe9/0x1c0 |
| [440700.397510] do_utimes+0xc5/0x150 |
| [440700.397520] __x64_sys_utimensat+0x88/0xd0 |
| |
| The Linux kernel CVE team has assigned CVE-2021-46960 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.11 with commit 61cfac6f267dabcf2740a7ec8a0295833b28b5f5 and fixed in 4.14.233 with commit e94851629c49c65b4fbb29a5725ddfd7988f8f20 |
| Issue introduced in 4.11 with commit 61cfac6f267dabcf2740a7ec8a0295833b28b5f5 and fixed in 4.19.191 with commit e486f8397f3f14a7cadc166138141fdb14379a54 |
| Issue introduced in 4.11 with commit 61cfac6f267dabcf2740a7ec8a0295833b28b5f5 and fixed in 5.4.118 with commit 93f3339b22ba17e66f0808737467b70ba087eaec |
| Issue introduced in 4.11 with commit 61cfac6f267dabcf2740a7ec8a0295833b28b5f5 and fixed in 5.10.36 with commit aaa0faa5c28a91c362352d6b35dc3ed10df56fb0 |
| Issue introduced in 4.11 with commit 61cfac6f267dabcf2740a7ec8a0295833b28b5f5 and fixed in 5.11.20 with commit f59a9242942fef0de7b926e438ba4eae65d4b4dd |
| Issue introduced in 4.11 with commit 61cfac6f267dabcf2740a7ec8a0295833b28b5f5 and fixed in 5.12.3 with commit b399c1a3ea0b9d10047ff266d65533df7f15532f |
| Issue introduced in 4.11 with commit 61cfac6f267dabcf2740a7ec8a0295833b28b5f5 and fixed in 5.13 with commit 83728cbf366e334301091d5b808add468ab46b27 |
| |
| 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-2021-46960 |
| 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/cifs/smb2ops.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/e94851629c49c65b4fbb29a5725ddfd7988f8f20 |
| https://git.kernel.org/stable/c/e486f8397f3f14a7cadc166138141fdb14379a54 |
| https://git.kernel.org/stable/c/93f3339b22ba17e66f0808737467b70ba087eaec |
| https://git.kernel.org/stable/c/aaa0faa5c28a91c362352d6b35dc3ed10df56fb0 |
| https://git.kernel.org/stable/c/f59a9242942fef0de7b926e438ba4eae65d4b4dd |
| https://git.kernel.org/stable/c/b399c1a3ea0b9d10047ff266d65533df7f15532f |
| https://git.kernel.org/stable/c/83728cbf366e334301091d5b808add468ab46b27 |
