| 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-2024-49952: netfilter: nf_tables: prevent nf_skb_duplicated corruption |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| netfilter: nf_tables: prevent nf_skb_duplicated corruption |
| |
| syzbot found that nf_dup_ipv4() or nf_dup_ipv6() could write |
| per-cpu variable nf_skb_duplicated in an unsafe way [1]. |
| |
| Disabling preemption as hinted by the splat is not enough, |
| we have to disable soft interrupts as well. |
| |
| [1] |
| BUG: using __this_cpu_write() in preemptible [00000000] code: syz.4.282/6316 |
| caller is nf_dup_ipv4+0x651/0x8f0 net/ipv4/netfilter/nf_dup_ipv4.c:87 |
| CPU: 0 UID: 0 PID: 6316 Comm: syz.4.282 Not tainted 6.11.0-rc7-syzkaller-00104-g7052622fccb1 #0 |
| Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 |
| Call Trace: |
| <TASK> |
| __dump_stack lib/dump_stack.c:93 [inline] |
| dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 |
| check_preemption_disabled+0x10e/0x120 lib/smp_processor_id.c:49 |
| nf_dup_ipv4+0x651/0x8f0 net/ipv4/netfilter/nf_dup_ipv4.c:87 |
| nft_dup_ipv4_eval+0x1db/0x300 net/ipv4/netfilter/nft_dup_ipv4.c:30 |
| expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline] |
| nft_do_chain+0x4ad/0x1da0 net/netfilter/nf_tables_core.c:288 |
| nft_do_chain_ipv4+0x202/0x320 net/netfilter/nft_chain_filter.c:23 |
| nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] |
| nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626 |
| nf_hook+0x2c4/0x450 include/linux/netfilter.h:269 |
| NF_HOOK_COND include/linux/netfilter.h:302 [inline] |
| ip_output+0x185/0x230 net/ipv4/ip_output.c:433 |
| ip_local_out net/ipv4/ip_output.c:129 [inline] |
| ip_send_skb+0x74/0x100 net/ipv4/ip_output.c:1495 |
| udp_send_skb+0xacf/0x1650 net/ipv4/udp.c:981 |
| udp_sendmsg+0x1c21/0x2a60 net/ipv4/udp.c:1269 |
| sock_sendmsg_nosec net/socket.c:730 [inline] |
| __sock_sendmsg+0x1a6/0x270 net/socket.c:745 |
| ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597 |
| ___sys_sendmsg net/socket.c:2651 [inline] |
| __sys_sendmmsg+0x3b2/0x740 net/socket.c:2737 |
| __do_sys_sendmmsg net/socket.c:2766 [inline] |
| __se_sys_sendmmsg net/socket.c:2763 [inline] |
| __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2763 |
| do_syscall_x64 arch/x86/entry/common.c:52 [inline] |
| do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 |
| entry_SYSCALL_64_after_hwframe+0x77/0x7f |
| RIP: 0033:0x7f4ce4f7def9 |
| Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 |
| RSP: 002b:00007f4ce5d4a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 |
| RAX: ffffffffffffffda RBX: 00007f4ce5135f80 RCX: 00007f4ce4f7def9 |
| RDX: 0000000000000001 RSI: 0000000020005d40 RDI: 0000000000000006 |
| RBP: 00007f4ce4ff0b76 R08: 0000000000000000 R09: 0000000000000000 |
| R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 |
| R13: 0000000000000000 R14: 00007f4ce5135f80 R15: 00007ffd4cbc6d68 |
| </TASK> |
| |
| The Linux kernel CVE team has assigned CVE-2024-49952 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.3 with commit d877f07112f1e5a247c6b585c971a93895c9f738 and fixed in 4.19.323 with commit 50067d8b3f48e4cd4c9e817d3e9a5b5ff3507ca7 |
| Issue introduced in 4.3 with commit d877f07112f1e5a247c6b585c971a93895c9f738 and fixed in 5.4.285 with commit c0add6ed2cf1c4733cd489efc61faeccd3433b41 |
| Issue introduced in 4.3 with commit d877f07112f1e5a247c6b585c971a93895c9f738 and fixed in 5.10.227 with commit 531754952f5dfc4b141523088147071d6e6112c4 |
| Issue introduced in 4.3 with commit d877f07112f1e5a247c6b585c971a93895c9f738 and fixed in 5.15.168 with commit 38e3fd0c4a2616052eb3c8f4e6f32d1ff47cd663 |
| Issue introduced in 4.3 with commit d877f07112f1e5a247c6b585c971a93895c9f738 and fixed in 6.1.113 with commit b40b027a0c0cc1cb9471a13f9730bb2fff12a15b |
| Issue introduced in 4.3 with commit d877f07112f1e5a247c6b585c971a93895c9f738 and fixed in 6.6.55 with commit 4e3542f40f3a94efa59ea328e307c50601ed7065 |
| Issue introduced in 4.3 with commit d877f07112f1e5a247c6b585c971a93895c9f738 and fixed in 6.10.14 with commit f839c5cd348201fec440d987cbca9b979bdb4fa7 |
| Issue introduced in 4.3 with commit d877f07112f1e5a247c6b585c971a93895c9f738 and fixed in 6.11.3 with commit 752e1924604254f1708f3e3700283a86ebdd325d |
| Issue introduced in 4.3 with commit d877f07112f1e5a247c6b585c971a93895c9f738 and fixed in 6.12 with commit 92ceba94de6fb4cee2bf40b485979c342f44a492 |
| |
| 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-2024-49952 |
| 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/ipv4/netfilter/nf_dup_ipv4.c |
| net/ipv6/netfilter/nf_dup_ipv6.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/50067d8b3f48e4cd4c9e817d3e9a5b5ff3507ca7 |
| https://git.kernel.org/stable/c/c0add6ed2cf1c4733cd489efc61faeccd3433b41 |
| https://git.kernel.org/stable/c/531754952f5dfc4b141523088147071d6e6112c4 |
| https://git.kernel.org/stable/c/38e3fd0c4a2616052eb3c8f4e6f32d1ff47cd663 |
| https://git.kernel.org/stable/c/b40b027a0c0cc1cb9471a13f9730bb2fff12a15b |
| https://git.kernel.org/stable/c/4e3542f40f3a94efa59ea328e307c50601ed7065 |
| https://git.kernel.org/stable/c/f839c5cd348201fec440d987cbca9b979bdb4fa7 |
| https://git.kernel.org/stable/c/752e1924604254f1708f3e3700283a86ebdd325d |
| https://git.kernel.org/stable/c/92ceba94de6fb4cee2bf40b485979c342f44a492 |
