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CVE-2023-52698

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : <=6.1.*, 5.15.148, <408bbd1e1746fe33e51f4c81c2febd7d3841d031, <a4529a08d3704c17ea9c7277d180e46b99250ded, <321b3a5592c8a9d6b654c7c64833ea67dbb33149, <44a88650ba55e6a7f2ec485d2c2413ba7e216f01, <f14d36e6e97fe935a20e0ceb159c100f90b6627c, 0, 6.6.14, 6.8, 6.1.75, 5.4.268, <=5.10.*, <=6.6.*, <36e19f84634aaa94f543fedc0a07588949638d53, <=5.4.*, <=4.19.*, <ec4e9d630a64df500641892f4e259e8149594a99, <9a8f811a146aa2a0230f8edb2e9f4b6609aab8da, 4.8, 6.7.2, <=*, <=5.15.*, 5.10.209, <=6.7.*, 4.19.306, <4.8, cb72d38211eacda2dd90b09540542b6582da614e

Description

In the Linux kernel, the following vulnerability has been resolved: calipso: fix memory leak in netlbl_calipso_add_pass() If IPv6 support is disabled at boot (ipv6.disable=1), the calipso_init() -> netlbl_calipso_ops_register() function isn't called, and the netlbl_calipso_ops_get() function always returns NULL. In this case, the netlbl_calipso_add_pass() function allocates memory for the doi_def variable but doesn't free it with the calipso_doi_free(). BUG: memory leak unreferenced object 0xffff888011d68180 (size 64): comm "syz-executor.1", pid 10746, jiffies 4295410986 (age 17.928s) hex dump (first 32 bytes): 00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<...>] kmalloc include/linux/slab.h:552 [inline] [<...>] netlbl_calipso_add_pass net/netlabel/netlabel_calipso.c:76 [inline] [<...>] netlbl_calipso_add+0x22e/0x4f0 net/netlabel/netlabel_calipso.c:111 [<...>] genl_family_rcv_msg_doit+0x22f/0x330 net/netlink/genetlink.c:739 [<...>] genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] [<...>] genl_rcv_msg+0x341/0x5a0 net/netlink/genetlink.c:800 [<...>] netlink_rcv_skb+0x14d/0x440 net/netlink/af_netlink.c:2515 [<...>] genl_rcv+0x29/0x40 net/netlink/genetlink.c:811 [<...>] netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] [<...>] netlink_unicast+0x54b/0x800 net/netlink/af_netlink.c:1339 [<...>] netlink_sendmsg+0x90a/0xdf0 net/netlink/af_netlink.c:1934 [<...>] sock_sendmsg_nosec net/socket.c:651 [inline] [<...>] sock_sendmsg+0x157/0x190 net/socket.c:671 [<...>] ____sys_sendmsg+0x712/0x870 net/socket.c:2342 [<...>] ___sys_sendmsg+0xf8/0x170 net/socket.c:2396 [<...>] __sys_sendmsg+0xea/0x1b0 net/socket.c:2429 [<...>] do_syscall_64+0x30/0x40 arch/x86/entry/common.c:46 [<...>] entry_SYSCALL_64_after_hwframe+0x61/0xc6 Found by InfoTeCS on behalf of Linux Verification Center (linuxtesting.org) with Syzkaller [PM: merged via the LSM tree at Jakub Kicinski request]

Gravité et risque d'exploitation

CVE-2023-52698 obtient un score CVSS de 0.0/10, soit une gravité non évaluée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.22 %, ce qui la place devant 12.1 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, 5.15.148, <408bbd1e1746fe33e51f4c81c2febd7d3841d031, <a4529a08d3704c17ea9c7277d180e46b99250ded, <321b3a5592c8a9d6b654c7c64833ea67dbb33149, <44a88650ba55e6a7f2ec485d2c2413ba7e216f01, <f14d36e6e97fe935a20e0ceb159c100f90b6627c, 0, 6.6.14, 6.8, 6.1.75, 5.4.268, <=5.10.*, <=6.6.*, <36e19f84634aaa94f543fedc0a07588949638d53, <=5.4.*, <=4.19.*, <ec4e9d630a64df500641892f4e259e8149594a99, <9a8f811a146aa2a0230f8edb2e9f4b6609aab8da, 4.8, 6.7.2, <=*, <=5.15.*, 5.10.209, <=6.7.*, 4.19.306, <4.8, cb72d38211eacda2dd90b09540542b6582da614e) 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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