| 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-2021-47336: smackfs: restrict bytes count in smk_set_cipso() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| smackfs: restrict bytes count in smk_set_cipso() |
| |
| Oops, I failed to update subject line. |
| |
| From 07571157c91b98ce1a4aa70967531e64b78e8346 Mon Sep 17 00:00:00 2001 |
| Date: Mon, 12 Apr 2021 22:25:06 +0900 |
| Subject: [PATCH] smackfs: restrict bytes count in smk_set_cipso() |
| |
| Commit 7ef4c19d245f3dc2 ("smackfs: restrict bytes count in smackfs write |
| functions") missed that count > SMK_CIPSOMAX check applies to only |
| format == SMK_FIXED24_FMT case. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47336 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.9.276 with commit 5f9880403e6b71d56924748ba331daf836243fca |
| Fixed in 4.14.240 with commit 5c2dca9a7a7ff6a2df34158903515e2e4fd3d2b2 |
| Fixed in 4.19.198 with commit cbd87ba6a13891acf6180783f8234a8b7a3e3d4d |
| Fixed in 5.4.133 with commit 135122f174c357b7a3e58f40fa5792156c5e93e6 |
| Fixed in 5.10.51 with commit 3780348c1a0e14ffefcaf1fc521f815bcaac94b0 |
| Fixed in 5.12.18 with commit 8f5c773a2871cf446e3f36b2834fb25bbb28512b |
| Fixed in 5.13.3 with commit 258fd821f69378453c071b9dd767b298810fc766 |
| Fixed in 5.14 with commit 49ec114a6e62d8d320037ce71c1aaf9650b3cafd |
| |
| 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-2021-47336 |
| 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: |
| security/smack/smackfs.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/5f9880403e6b71d56924748ba331daf836243fca |
| https://git.kernel.org/stable/c/5c2dca9a7a7ff6a2df34158903515e2e4fd3d2b2 |
| https://git.kernel.org/stable/c/cbd87ba6a13891acf6180783f8234a8b7a3e3d4d |
| https://git.kernel.org/stable/c/135122f174c357b7a3e58f40fa5792156c5e93e6 |
| https://git.kernel.org/stable/c/3780348c1a0e14ffefcaf1fc521f815bcaac94b0 |
| https://git.kernel.org/stable/c/8f5c773a2871cf446e3f36b2834fb25bbb28512b |
| https://git.kernel.org/stable/c/258fd821f69378453c071b9dd767b298810fc766 |
| https://git.kernel.org/stable/c/49ec114a6e62d8d320037ce71c1aaf9650b3cafd |
