| 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-2024-26882: net: ip_tunnel: make sure to pull inner header in ip_tunnel_rcv() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net: ip_tunnel: make sure to pull inner header in ip_tunnel_rcv() |
| |
| Apply the same fix than ones found in : |
| |
| 8d975c15c0cd ("ip6_tunnel: make sure to pull inner header in __ip6_tnl_rcv()") |
| 1ca1ba465e55 ("geneve: make sure to pull inner header in geneve_rx()") |
| |
| We have to save skb->network_header in a temporary variable |
| in order to be able to recompute the network_header pointer |
| after a pskb_inet_may_pull() call. |
| |
| pskb_inet_may_pull() makes sure the needed headers are in skb->head. |
| |
| syzbot reported: |
| BUG: KMSAN: uninit-value in __INET_ECN_decapsulate include/net/inet_ecn.h:253 [inline] |
| BUG: KMSAN: uninit-value in INET_ECN_decapsulate include/net/inet_ecn.h:275 [inline] |
| BUG: KMSAN: uninit-value in IP_ECN_decapsulate include/net/inet_ecn.h:302 [inline] |
| BUG: KMSAN: uninit-value in ip_tunnel_rcv+0xed9/0x2ed0 net/ipv4/ip_tunnel.c:409 |
| __INET_ECN_decapsulate include/net/inet_ecn.h:253 [inline] |
| INET_ECN_decapsulate include/net/inet_ecn.h:275 [inline] |
| IP_ECN_decapsulate include/net/inet_ecn.h:302 [inline] |
| ip_tunnel_rcv+0xed9/0x2ed0 net/ipv4/ip_tunnel.c:409 |
| __ipgre_rcv+0x9bc/0xbc0 net/ipv4/ip_gre.c:389 |
| ipgre_rcv net/ipv4/ip_gre.c:411 [inline] |
| gre_rcv+0x423/0x19f0 net/ipv4/ip_gre.c:447 |
| gre_rcv+0x2a4/0x390 net/ipv4/gre_demux.c:163 |
| ip_protocol_deliver_rcu+0x264/0x1300 net/ipv4/ip_input.c:205 |
| ip_local_deliver_finish+0x2b8/0x440 net/ipv4/ip_input.c:233 |
| NF_HOOK include/linux/netfilter.h:314 [inline] |
| ip_local_deliver+0x21f/0x490 net/ipv4/ip_input.c:254 |
| dst_input include/net/dst.h:461 [inline] |
| ip_rcv_finish net/ipv4/ip_input.c:449 [inline] |
| NF_HOOK include/linux/netfilter.h:314 [inline] |
| ip_rcv+0x46f/0x760 net/ipv4/ip_input.c:569 |
| __netif_receive_skb_one_core net/core/dev.c:5534 [inline] |
| __netif_receive_skb+0x1a6/0x5a0 net/core/dev.c:5648 |
| netif_receive_skb_internal net/core/dev.c:5734 [inline] |
| netif_receive_skb+0x58/0x660 net/core/dev.c:5793 |
| tun_rx_batched+0x3ee/0x980 drivers/net/tun.c:1556 |
| tun_get_user+0x53b9/0x66e0 drivers/net/tun.c:2009 |
| tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2055 |
| call_write_iter include/linux/fs.h:2087 [inline] |
| new_sync_write fs/read_write.c:497 [inline] |
| vfs_write+0xb6b/0x1520 fs/read_write.c:590 |
| ksys_write+0x20f/0x4c0 fs/read_write.c:643 |
| __do_sys_write fs/read_write.c:655 [inline] |
| __se_sys_write fs/read_write.c:652 [inline] |
| __x64_sys_write+0x93/0xd0 fs/read_write.c:652 |
| do_syscall_x64 arch/x86/entry/common.c:52 [inline] |
| do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 |
| entry_SYSCALL_64_after_hwframe+0x63/0x6b |
| |
| Uninit was created at: |
| __alloc_pages+0x9a6/0xe00 mm/page_alloc.c:4590 |
| alloc_pages_mpol+0x62b/0x9d0 mm/mempolicy.c:2133 |
| alloc_pages+0x1be/0x1e0 mm/mempolicy.c:2204 |
| skb_page_frag_refill+0x2bf/0x7c0 net/core/sock.c:2909 |
| tun_build_skb drivers/net/tun.c:1686 [inline] |
| tun_get_user+0xe0a/0x66e0 drivers/net/tun.c:1826 |
| tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2055 |
| call_write_iter include/linux/fs.h:2087 [inline] |
| new_sync_write fs/read_write.c:497 [inline] |
| vfs_write+0xb6b/0x1520 fs/read_write.c:590 |
| ksys_write+0x20f/0x4c0 fs/read_write.c:643 |
| __do_sys_write fs/read_write.c:655 [inline] |
| __se_sys_write fs/read_write.c:652 [inline] |
| __x64_sys_write+0x93/0xd0 fs/read_write.c:652 |
| do_syscall_x64 arch/x86/entry/common.c:52 [inline] |
| do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 |
| entry_SYSCALL_64_after_hwframe+0x63/0x6b |
| |
| The Linux kernel CVE team has assigned CVE-2024-26882 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.10 with commit c54419321455631079c7d6e60bc732dd0c5914c5 and fixed in 5.4.273 with commit ec6bb01e02cbd47781dd90775b631a1dc4bd9d2b |
| Issue introduced in 3.10 with commit c54419321455631079c7d6e60bc732dd0c5914c5 and fixed in 5.10.214 with commit 77fd5294ea09b21f6772ac954a121b87323cec80 |
| Issue introduced in 3.10 with commit c54419321455631079c7d6e60bc732dd0c5914c5 and fixed in 5.15.153 with commit 5c03387021cfa3336b97e0dcba38029917a8af2a |
| Issue introduced in 3.10 with commit c54419321455631079c7d6e60bc732dd0c5914c5 and fixed in 6.1.83 with commit 60044ab84836359534bd7153b92e9c1584140e4a |
| Issue introduced in 3.10 with commit c54419321455631079c7d6e60bc732dd0c5914c5 and fixed in 6.6.23 with commit c4c857723b37c20651300b3de4ff25059848b4b0 |
| Issue introduced in 3.10 with commit c54419321455631079c7d6e60bc732dd0c5914c5 and fixed in 6.7.11 with commit f6723d8dbfdc10c784a56748f86a9a3cd410dbd5 |
| Issue introduced in 3.10 with commit c54419321455631079c7d6e60bc732dd0c5914c5 and fixed in 6.8.2 with commit ca914f1cdee8a85799942c9b0ce5015bbd6844e1 |
| Issue introduced in 3.10 with commit c54419321455631079c7d6e60bc732dd0c5914c5 and fixed in 6.9 with commit b0ec2abf98267f14d032102551581c833b0659d3 |
| |
| 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-2024-26882 |
| 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/ip_tunnel.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/ec6bb01e02cbd47781dd90775b631a1dc4bd9d2b |
| https://git.kernel.org/stable/c/77fd5294ea09b21f6772ac954a121b87323cec80 |
| https://git.kernel.org/stable/c/5c03387021cfa3336b97e0dcba38029917a8af2a |
| https://git.kernel.org/stable/c/60044ab84836359534bd7153b92e9c1584140e4a |
| https://git.kernel.org/stable/c/c4c857723b37c20651300b3de4ff25059848b4b0 |
| https://git.kernel.org/stable/c/f6723d8dbfdc10c784a56748f86a9a3cd410dbd5 |
| https://git.kernel.org/stable/c/ca914f1cdee8a85799942c9b0ce5015bbd6844e1 |
| https://git.kernel.org/stable/c/b0ec2abf98267f14d032102551581c833b0659d3 |
