| 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-2022-49561: netfilter: conntrack: re-fetch conntrack after insertion |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| netfilter: conntrack: re-fetch conntrack after insertion |
| |
| In case the conntrack is clashing, insertion can free skb->_nfct and |
| set skb->_nfct to the already-confirmed entry. |
| |
| This wasn't found before because the conntrack entry and the extension |
| space used to free'd after an rcu grace period, plus the race needs |
| events enabled to trigger. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49561 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.7 with commit 71d8c47fc653711c41bc3282e5b0e605b3727956 and fixed in 4.14.282 with commit e97222b785e70e8973281666d709baad6523d8af |
| Issue introduced in 4.7 with commit 71d8c47fc653711c41bc3282e5b0e605b3727956 and fixed in 4.19.246 with commit 92a999d1963eed0df666284e20055136ceabd12f |
| Issue introduced in 4.7 with commit 71d8c47fc653711c41bc3282e5b0e605b3727956 and fixed in 5.4.197 with commit b16bb373988da3ceb0308381634117e18b6ec60d |
| Issue introduced in 4.7 with commit 71d8c47fc653711c41bc3282e5b0e605b3727956 and fixed in 5.10.120 with commit 91a36ec160ec1a0c8f5352b772dffcbb0b6023e3 |
| Issue introduced in 4.7 with commit 71d8c47fc653711c41bc3282e5b0e605b3727956 and fixed in 5.15.45 with commit 01989d7eebb61c99bd4b88ebc8e261bd2f02caed |
| Issue introduced in 4.7 with commit 71d8c47fc653711c41bc3282e5b0e605b3727956 and fixed in 5.17.13 with commit 04f9e9104c969d8ce10a4a43634f641ed082092d |
| Issue introduced in 4.7 with commit 71d8c47fc653711c41bc3282e5b0e605b3727956 and fixed in 5.18.2 with commit 04e4a11dc723c52db7a36dc58f0d69ce6426f8f0 |
| Issue introduced in 4.7 with commit 71d8c47fc653711c41bc3282e5b0e605b3727956 and fixed in 5.19 with commit 56b14ecec97f39118bf85c9ac2438c5a949509ed |
| |
| 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-2022-49561 |
| 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: |
| include/net/netfilter/nf_conntrack_core.h |
| |
| |
| 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/e97222b785e70e8973281666d709baad6523d8af |
| https://git.kernel.org/stable/c/92a999d1963eed0df666284e20055136ceabd12f |
| https://git.kernel.org/stable/c/b16bb373988da3ceb0308381634117e18b6ec60d |
| https://git.kernel.org/stable/c/91a36ec160ec1a0c8f5352b772dffcbb0b6023e3 |
| https://git.kernel.org/stable/c/01989d7eebb61c99bd4b88ebc8e261bd2f02caed |
| https://git.kernel.org/stable/c/04f9e9104c969d8ce10a4a43634f641ed082092d |
| https://git.kernel.org/stable/c/04e4a11dc723c52db7a36dc58f0d69ce6426f8f0 |
| https://git.kernel.org/stable/c/56b14ecec97f39118bf85c9ac2438c5a949509ed |
