| 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-2024-39503: netfilter: ipset: Fix race between namespace cleanup and gc in the list:set type |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| netfilter: ipset: Fix race between namespace cleanup and gc in the list:set type |
| |
| Lion Ackermann reported that there is a race condition between namespace cleanup |
| in ipset and the garbage collection of the list:set type. The namespace |
| cleanup can destroy the list:set type of sets while the gc of the set type is |
| waiting to run in rcu cleanup. The latter uses data from the destroyed set which |
| thus leads use after free. The patch contains the following parts: |
| |
| - When destroying all sets, first remove the garbage collectors, then wait |
| if needed and then destroy the sets. |
| - Fix the badly ordered "wait then remove gc" for the destroy a single set |
| case. |
| - Fix the missing rcu locking in the list:set type in the userspace test |
| case. |
| - Use proper RCU list handlings in the list:set type. |
| |
| The patch depends on c1193d9bbbd3 (netfilter: ipset: Add list flush to cancel_gc). |
| |
| The Linux kernel CVE team has assigned CVE-2024-39503 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.4.269 with commit c7f2733e5011bfd136f1ca93497394d43aa76225 and fixed in 5.4.279 with commit c0761d1f1ce1d5b85b5e82bbb714df12de1aa8c3 |
| Issue introduced in 5.10.210 with commit a24d5f2ac8ef702a58e55ec276aad29b4bd97e05 and fixed in 5.10.221 with commit 93b53c202b51a69e42ca57f5a183f7e008e19f83 |
| Issue introduced in 5.15.149 with commit c2dc077d8f722a1c73a24e674f925602ee5ece49 and fixed in 5.15.162 with commit 0f1bb77c6d837c9513943bc7c08f04c5cc5c6568 |
| Issue introduced in 6.1.79 with commit 653bc5e6d9995d7d5f497c665b321875a626161c and fixed in 6.1.95 with commit 390b353d1a1da3e9c6c0fd14fe650d69063c95d6 |
| Issue introduced in 6.6.18 with commit b93a6756a01f4fd2f329a39216f9824c56a66397 and fixed in 6.6.35 with commit 2ba35b37f780c6410bb4bba9c3072596d8576702 |
| Issue introduced in 6.8 with commit 97f7cf1cd80eeed3b7c808b7c12463295c751001 and fixed in 6.9.6 with commit 90ae20d47de602198eb69e6cd7a3db3420abfc08 |
| Issue introduced in 6.8 with commit 97f7cf1cd80eeed3b7c808b7c12463295c751001 and fixed in 6.10 with commit 4e7aaa6b82d63e8ddcbfb56b4fd3d014ca586f10 |
| Issue introduced in 6.7.6 with commit 970709a67696b100a57b33af1a3d75fc34b747eb |
| |
| 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-2024-39503 |
| 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: |
| net/netfilter/ipset/ip_set_core.c |
| net/netfilter/ipset/ip_set_list_set.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/c0761d1f1ce1d5b85b5e82bbb714df12de1aa8c3 |
| https://git.kernel.org/stable/c/93b53c202b51a69e42ca57f5a183f7e008e19f83 |
| https://git.kernel.org/stable/c/0f1bb77c6d837c9513943bc7c08f04c5cc5c6568 |
| https://git.kernel.org/stable/c/390b353d1a1da3e9c6c0fd14fe650d69063c95d6 |
| https://git.kernel.org/stable/c/2ba35b37f780c6410bb4bba9c3072596d8576702 |
| https://git.kernel.org/stable/c/90ae20d47de602198eb69e6cd7a3db3420abfc08 |
| https://git.kernel.org/stable/c/4e7aaa6b82d63e8ddcbfb56b4fd3d014ca586f10 |
