CVE-2024-26663: tipc: Check the bearer type before calling tipc_udp_nl_bearer_add()
First published: Tue Apr 02 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: tipc: Check the bearer type before calling tipc_udp_nl_bearer_add() syzbot reported the following general protection fault [1]: general protection fault, probably for non-canonical address 0xdffffc0000000010: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000080-0x0000000000000087] ... RIP: 0010:tipc_udp_is_known_peer+0x9c/0x250 net/tipc/udp_media.c:291 ... Call Trace: <TASK> tipc_udp_nl_bearer_add+0x212/0x2f0 net/tipc/udp_media.c:646 tipc_nl_bearer_add+0x21e/0x360 net/tipc/bearer.c:1089 genl_family_rcv_msg_doit+0x1fc/0x2e0 net/netlink/genetlink.c:972 genl_family_rcv_msg net/netlink/genetlink.c:1052 [inline] genl_rcv_msg+0x561/0x800 net/netlink/genetlink.c:1067 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2544 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1076 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x53b/0x810 net/netlink/af_netlink.c:1367 netlink_sendmsg+0x8b7/0xd70 net/netlink/af_netlink.c:1909 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0xd5/0x180 net/socket.c:745 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2584 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2638 __sys_sendmsg+0x117/0x1e0 net/socket.c:2667 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b The cause of this issue is that when tipc_nl_bearer_add() is called with the TIPC_NLA_BEARER_UDP_OPTS attribute, tipc_udp_nl_bearer_add() is called even if the bearer is not UDP. tipc_udp_is_known_peer() called by tipc_udp_nl_bearer_add() assumes that the media_ptr field of the tipc_bearer has an udp_bearer type object, so the function goes crazy for non-UDP bearers. This patch fixes the issue by checking the bearer type before calling tipc_udp_nl_bearer_add() in tipc_nl_bearer_add().
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.112-1 6.11.5-1 6.11.7-1 | |
| redhat/kernel | <4.19.307 | 4.19.307 |
| redhat/kernel | <5.4.269 | 5.4.269 |
| redhat/kernel | <5.10.210 | 5.10.210 |
| redhat/kernel | <5.15.149 | 5.15.149 |
| redhat/kernel | <6.1.78 | 6.1.78 |
| redhat/kernel | <6.6.17 | 6.6.17 |
| redhat/kernel | <6.7.5 | 6.7.5 |
| redhat/kernel | <6.8 | 6.8 |
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Reference Links
- https://git.kernel.org/stable/c/0cd331dfd6023640c9669d0592bc0fd491205f87
- https://git.kernel.org/stable/c/19d7314f2fb9515bdaac9829d4d8eb34edd1fe95
- https://git.kernel.org/stable/c/24ec8f0da93b8a9fba11600be8a90f0d73fb46f1
- https://git.kernel.org/stable/c/3871aa01e1a779d866fa9dfdd5a836f342f4eb87
- https://git.kernel.org/stable/c/3d3a5b31b43515b5752ff282702ca546ec3e48b6
- https://git.kernel.org/stable/c/6f70f0b412458c622a12d4292782c8e92e210c2f
- https://git.kernel.org/stable/c/888e3524be87f3df9fa3c083484e4b62b3e3bb59
- https://git.kernel.org/stable/c/c1701ea85ef0ec7be6a1b36c7da69f572ed2fd12
- https://launchpad.net/bugs/cve/CVE-2024-26663
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26663
- https://nvd.nist.gov/vuln/detail/CVE-2024-26663
- https://security-tracker.debian.org/tracker/CVE-2024-26663
- https://ubuntu.com/security/CVE-2024-26663
- https://git.kernel.org/linus/3871aa01e1a779d866fa9dfdd5a836f342f4eb87
- https://access.redhat.com/security/cve/CVE-2024-26663
- https://lore.kernel.org/linux-cve-announce/2024040223-CVE-2024-26663-9705@gregkh/T
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2272789
- https://access.redhat.com/errata/RHSA-2024:9315
- https://bugzilla.redhat.com/show_bug.cgi?id=2272788
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