| 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-2022-49553: fs/ntfs3: validate BOOT sectors_per_clusters |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| fs/ntfs3: validate BOOT sectors_per_clusters |
| |
| When the NTFS BOOT sectors_per_clusters field is > 0x80, it represents a |
| shift value. Make sure that the shift value is not too large before using |
| it (NTFS max cluster size is 2MB). Return -EVINVAL if it too large. |
| |
| This prevents negative shift values and shift values that are larger than |
| the field size. |
| |
| Prevents this UBSAN error: |
| |
| UBSAN: shift-out-of-bounds in ../fs/ntfs3/super.c:673:16 |
| shift exponent -192 is negative |
| |
| The Linux kernel CVE team has assigned CVE-2022-49553 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.15 with commit 82cae269cfa953032fbb8980a7d554d60fb00b17 and fixed in 5.15.45 with commit 58cf68a1886d14ffdc5c892ce483a82156769e88 |
| Issue introduced in 5.15 with commit 82cae269cfa953032fbb8980a7d554d60fb00b17 and fixed in 5.17.13 with commit 4746c49b11b2403f5b5b07c6eac9e60663dcd9a3 |
| Issue introduced in 5.15 with commit 82cae269cfa953032fbb8980a7d554d60fb00b17 and fixed in 5.18.2 with commit a2b6986316a2d106f6951e76db70fa4b2fde64a9 |
| Issue introduced in 5.15 with commit 82cae269cfa953032fbb8980a7d554d60fb00b17 and fixed in 5.19 with commit a3b774342fa752a5290c0de36375289dfcf4a260 |
| |
| 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-2022-49553 |
| 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/ntfs3/super.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/58cf68a1886d14ffdc5c892ce483a82156769e88 |
| https://git.kernel.org/stable/c/4746c49b11b2403f5b5b07c6eac9e60663dcd9a3 |
| https://git.kernel.org/stable/c/a2b6986316a2d106f6951e76db70fa4b2fde64a9 |
| https://git.kernel.org/stable/c/a3b774342fa752a5290c0de36375289dfcf4a260 |
