| 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-2024-53685: ceph: give up on paths longer than PATH_MAX |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ceph: give up on paths longer than PATH_MAX |
| |
| If the full path to be built by ceph_mdsc_build_path() happens to be |
| longer than PATH_MAX, then this function will enter an endless (retry) |
| loop, effectively blocking the whole task. Most of the machine |
| becomes unusable, making this a very simple and effective DoS |
| vulnerability. |
| |
| I cannot imagine why this retry was ever implemented, but it seems |
| rather useless and harmful to me. Let's remove it and fail with |
| ENAMETOOLONG instead. |
| |
| The Linux kernel CVE team has assigned CVE-2024-53685 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 2.6.34 with commit 9030aaf9bf0a1eee47a154c316c789e959638b0f and fixed in 5.10.234 with commit 0f2b2d9e881c90402dbe28f9ba831775b7992e1f |
| Issue introduced in 2.6.34 with commit 9030aaf9bf0a1eee47a154c316c789e959638b0f and fixed in 5.15.177 with commit d42ad3f161a5a487f81915c406f46943c7187a0a |
| Issue introduced in 2.6.34 with commit 9030aaf9bf0a1eee47a154c316c789e959638b0f and fixed in 6.1.125 with commit e4b168c64da06954be5d520f6c16469b1cadc069 |
| Issue introduced in 2.6.34 with commit 9030aaf9bf0a1eee47a154c316c789e959638b0f and fixed in 6.6.70 with commit c47ed91156daf328601d02b58d52d9804da54108 |
| Issue introduced in 2.6.34 with commit 9030aaf9bf0a1eee47a154c316c789e959638b0f and fixed in 6.12.7 with commit 99a37ab76a315c8307eb5b0dc095d8ad9d8efeaa |
| Issue introduced in 2.6.34 with commit 9030aaf9bf0a1eee47a154c316c789e959638b0f and fixed in 6.13 with commit 550f7ca98ee028a606aa75705a7e77b1bd11720f |
| |
| 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-2024-53685 |
| 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/ceph/mds_client.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/0f2b2d9e881c90402dbe28f9ba831775b7992e1f |
| https://git.kernel.org/stable/c/d42ad3f161a5a487f81915c406f46943c7187a0a |
| https://git.kernel.org/stable/c/e4b168c64da06954be5d520f6c16469b1cadc069 |
| https://git.kernel.org/stable/c/c47ed91156daf328601d02b58d52d9804da54108 |
| https://git.kernel.org/stable/c/99a37ab76a315c8307eb5b0dc095d8ad9d8efeaa |
| https://git.kernel.org/stable/c/550f7ca98ee028a606aa75705a7e77b1bd11720f |
