| 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-2024-26849: netlink: add nla be16/32 types to minlen array |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| netlink: add nla be16/32 types to minlen array |
| |
| BUG: KMSAN: uninit-value in nla_validate_range_unsigned lib/nlattr.c:222 [inline] |
| BUG: KMSAN: uninit-value in nla_validate_int_range lib/nlattr.c:336 [inline] |
| BUG: KMSAN: uninit-value in validate_nla lib/nlattr.c:575 [inline] |
| BUG: KMSAN: uninit-value in __nla_validate_parse+0x2e20/0x45c0 lib/nlattr.c:631 |
| nla_validate_range_unsigned lib/nlattr.c:222 [inline] |
| nla_validate_int_range lib/nlattr.c:336 [inline] |
| validate_nla lib/nlattr.c:575 [inline] |
| ... |
| |
| The message in question matches this policy: |
| |
| [NFTA_TARGET_REV] = NLA_POLICY_MAX(NLA_BE32, 255), |
| |
| but because NLA_BE32 size in minlen array is 0, the validation |
| code will read past the malformed (too small) attribute. |
| |
| Note: Other attributes, e.g. BITFIELD32, SINT, UINT.. are also missing: |
| those likely should be added too. |
| |
| The Linux kernel CVE team has assigned CVE-2024-26849 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.1 with commit ecaf75ffd5f5db320d8b1da0198eef5a5ce64a3f and fixed in 6.1.81 with commit 0ac219c4c3ab253f3981f346903458d20bacab32 |
| Issue introduced in 6.1 with commit ecaf75ffd5f5db320d8b1da0198eef5a5ce64a3f and fixed in 6.6.21 with commit a2ab028151841cd833cb53eb99427e0cc990112d |
| Issue introduced in 6.1 with commit ecaf75ffd5f5db320d8b1da0198eef5a5ce64a3f and fixed in 6.7.9 with commit 7a9d14c63b35f89563c5ecbadf918ad64979712d |
| Issue introduced in 6.1 with commit ecaf75ffd5f5db320d8b1da0198eef5a5ce64a3f and fixed in 6.8 with commit 9a0d18853c280f6a0ee99f91619f2442a17a323a |
| |
| 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-2024-26849 |
| 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: |
| lib/nlattr.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/0ac219c4c3ab253f3981f346903458d20bacab32 |
| https://git.kernel.org/stable/c/a2ab028151841cd833cb53eb99427e0cc990112d |
| https://git.kernel.org/stable/c/7a9d14c63b35f89563c5ecbadf918ad64979712d |
| https://git.kernel.org/stable/c/9a0d18853c280f6a0ee99f91619f2442a17a323a |
