| 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-2022-49180: LSM: general protection fault in legacy_parse_param |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| LSM: general protection fault in legacy_parse_param |
| |
| The usual LSM hook "bail on fail" scheme doesn't work for cases where |
| a security module may return an error code indicating that it does not |
| recognize an input. In this particular case Smack sees a mount option |
| that it recognizes, and returns 0. A call to a BPF hook follows, which |
| returns -ENOPARAM, which confuses the caller because Smack has processed |
| its data. |
| |
| The SELinux hook incorrectly returns 1 on success. There was a time |
| when this was correct, however the current expectation is that it |
| return 0 on success. This is repaired. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49180 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 5.4.189 with commit ddcdda888e14ca451b3ee83d11b65b2a9c8e783b |
| Fixed in 5.10.110 with commit 2784604c8c6fc523248f8f80a421c313a9d790b7 |
| Fixed in 5.15.33 with commit f3f93a1aaafc3032e0a9655fb43deccfb3e953a3 |
| Fixed in 5.16.19 with commit 00fc07fa0b4a004711b6e1a944f0d2e46f7093b7 |
| Fixed in 5.17.2 with commit cadae7c5e477aaafcba819b8e4a3d1c1a1503b62 |
| Fixed in 5.18 with commit ecff30575b5ad0eda149aadad247b7f75411fd47 |
| |
| 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-2022-49180 |
| 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/security.c |
| security/selinux/hooks.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/ddcdda888e14ca451b3ee83d11b65b2a9c8e783b |
| https://git.kernel.org/stable/c/2784604c8c6fc523248f8f80a421c313a9d790b7 |
| https://git.kernel.org/stable/c/f3f93a1aaafc3032e0a9655fb43deccfb3e953a3 |
| https://git.kernel.org/stable/c/00fc07fa0b4a004711b6e1a944f0d2e46f7093b7 |
| https://git.kernel.org/stable/c/cadae7c5e477aaafcba819b8e4a3d1c1a1503b62 |
| https://git.kernel.org/stable/c/ecff30575b5ad0eda149aadad247b7f75411fd47 |
