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CVE-2024-26663

Vulnérabilité élevée dans Linux (Linux)

CVSS 7.8 · Élevée
EPSS 0.3%
Linux•Linux•Versions : <=6.1.*, <c1701ea85ef0ec7be6a1b36c7da69f572ed2fd12, <0cd331dfd6023640c9669d0592bc0fd491205f87, <3871aa01e1a779d866fa9dfdd5a836f342f4eb87, 0, 6.8, <3d3a5b31b43515b5752ff282702ca546ec3e48b6, <=5.10.*, <=6.6.*, 6.6.17, ef20cd4dd1633987bcf46ac34ace2c8af212361f, <24ec8f0da93b8a9fba11600be8a90f0d73fb46f1, 5.15.149, <=5.4.*, <4.9, <=4.19.*, <888e3524be87f3df9fa3c083484e4b62b3e3bb59, 4.19.307, 5.4.269, 5.10.210, <19d7314f2fb9515bdaac9829d4d8eb34edd1fe95, <=*, 4.9, <=5.15.*, <=6.7.*, 6.7.5, <6f70f0b412458c622a12d4292782c8e92e210c2f, 6.1.78

Description

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().

Gravité et risque d'exploitation

CVE-2024-26663 obtient un score CVSS de 7.8/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.25 %, ce qui la place devant 15.4 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, <c1701ea85ef0ec7be6a1b36c7da69f572ed2fd12, <0cd331dfd6023640c9669d0592bc0fd491205f87, <3871aa01e1a779d866fa9dfdd5a836f342f4eb87, 0, 6.8, <3d3a5b31b43515b5752ff282702ca546ec3e48b6, <=5.10.*, <=6.6.*, 6.6.17, ef20cd4dd1633987bcf46ac34ace2c8af212361f, <24ec8f0da93b8a9fba11600be8a90f0d73fb46f1, 5.15.149, <=5.4.*, <4.9, <=4.19.*, <888e3524be87f3df9fa3c083484e4b62b3e3bb59, 4.19.307, 5.4.269, 5.10.210, <19d7314f2fb9515bdaac9829d4d8eb34edd1fe95, <=*, 4.9, <=5.15.*, <=6.7.*, 6.7.5, <6f70f0b412458c622a12d4292782c8e92e210c2f, 6.1.78) est présent sur votre parc.
  • Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
  • À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
  • Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

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