cve-2023-52845
Vulnerability from cvelistv5
Published
2024-05-21 15:31
Modified
2024-09-11 17:32
Severity
Summary
tipc: Change nla_policy for bearer-related names to NLA_NUL_STRING
References
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"nvd": "{\"cve\":{\"id\":\"CVE-2023-52845\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-21T16:15:21.723\",\"lastModified\":\"2024-05-21T16:53:56.550\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntipc: Change nla_policy for bearer-related names to NLA_NUL_STRING\\n\\nsyzbot reported the following uninit-value access issue [1]:\\n\\n=====================================================\\nBUG: KMSAN: uninit-value in strlen lib/string.c:418 [inline]\\nBUG: KMSAN: uninit-value in strstr+0xb8/0x2f0 lib/string.c:756\\n strlen lib/string.c:418 [inline]\\n strstr+0xb8/0x2f0 lib/string.c:756\\n tipc_nl_node_reset_link_stats+0x3ea/0xb50 net/tipc/node.c:2595\\n genl_family_rcv_msg_doit net/netlink/genetlink.c:971 [inline]\\n genl_family_rcv_msg net/netlink/genetlink.c:1051 [inline]\\n genl_rcv_msg+0x11ec/0x1290 net/netlink/genetlink.c:1066\\n netlink_rcv_skb+0x371/0x650 net/netlink/af_netlink.c:2545\\n genl_rcv+0x40/0x60 net/netlink/genetlink.c:1075\\n netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline]\\n netlink_unicast+0xf47/0x1250 net/netlink/af_netlink.c:1368\\n netlink_sendmsg+0x1238/0x13d0 net/netlink/af_netlink.c:1910\\n sock_sendmsg_nosec net/socket.c:730 [inline]\\n sock_sendmsg net/socket.c:753 [inline]\\n ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2541\\n ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2595\\n __sys_sendmsg net/socket.c:2624 [inline]\\n __do_sys_sendmsg net/socket.c:2633 [inline]\\n __se_sys_sendmsg net/socket.c:2631 [inline]\\n __x64_sys_sendmsg+0x307/0x490 net/socket.c:2631\\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\\n do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80\\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\\n\\nUninit was created at:\\n slab_post_alloc_hook+0x12f/0xb70 mm/slab.h:767\\n slab_alloc_node mm/slub.c:3478 [inline]\\n kmem_cache_alloc_node+0x577/0xa80 mm/slub.c:3523\\n kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:559\\n __alloc_skb+0x318/0x740 net/core/skbuff.c:650\\n alloc_skb include/linux/skbuff.h:1286 [inline]\\n netlink_alloc_large_skb net/netlink/af_netlink.c:1214 [inline]\\n netlink_sendmsg+0xb34/0x13d0 net/netlink/af_netlink.c:1885\\n sock_sendmsg_nosec net/socket.c:730 [inline]\\n sock_sendmsg net/socket.c:753 [inline]\\n ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2541\\n ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2595\\n __sys_sendmsg net/socket.c:2624 [inline]\\n __do_sys_sendmsg net/socket.c:2633 [inline]\\n __se_sys_sendmsg net/socket.c:2631 [inline]\\n __x64_sys_sendmsg+0x307/0x490 net/socket.c:2631\\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\\n do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80\\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\\n\\nTIPC bearer-related names including link names must be null-terminated\\nstrings. If a link name which is not null-terminated is passed through\\nnetlink, strstr() and similar functions can cause buffer overrun. This\\ncauses the above issue.\\n\\nThis patch changes the nla_policy for bearer-related names from NLA_STRING\\nto NLA_NUL_STRING. This resolves the issue by ensuring that only\\nnull-terminated strings are accepted as bearer-related names.\\n\\nsyzbot reported similar uninit-value issue related to bearer names [2]. The\\nroot cause of this issue is that a non-null-terminated bearer name was\\npassed. This patch also resolved this issue.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: tipc: Cambiar nla_policy para nombres relacionados con el portador a NLA_NUL_STRING syzbot inform\u00f3 el siguiente problema de acceso de valor uninit [1]: ============== ======================================= BUG: KMSAN: valor uninit en strlen lib/ string.c:418 [en l\u00ednea] BUG: KMSAN: valor uninit en strstr+0xb8/0x2f0 lib/string.c:756 strlen lib/string.c:418 [en l\u00ednea] strstr+0xb8/0x2f0 lib/string.c: 756 tipc_nl_node_reset_link_stats+0x3ea/0xb50 net/tipc/node.c:2595 genl_family_rcv_msg_doit net/netlink/genetlink.c:971 [en l\u00ednea] genl_family_rcv_msg net/netlink/genetlink.c:1051 [en l\u00ednea] 0x1290 red/enlace de red/ genetlink.c:1066 netlink_rcv_skb+0x371/0x650 net/netlink/af_netlink.c:2545 genl_rcv+0x40/0x60 net/netlink/genetlink.c:1075 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [en l\u00ednea] netlink_unicast+0xf47/ 0x1250 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x1238/0x13d0 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [en l\u00ednea] sock_sendmsg net/socket.c:753 [en l\u00ednea] 2/ 0xd60 net/socket.c:2541 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2595 __sys_sendmsg net/socket.c:2624 [en l\u00ednea] __do_sys_sendmsg net/socket.c:2633 [en l\u00ednea] __se_sys_sendmsg red/socket. c:2631 [en l\u00ednea] __x64_sys_sendmsg+0x307/0x490 net/socket.c:2631 do_syscall_x64 arch/x86/entry/common.c:50 [en l\u00ednea] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 Entry_SYSCALL_64_after_hwframe+0 x63/ 0xcd Uninit se cre\u00f3 en: slab_post_alloc_hook+0x12f/0xb70 mm/slab.h:767 slab_alloc_node mm/slub.c:3478 [en l\u00ednea] kmem_cache_alloc_node+0x577/0xa80 mm/slub.c:3523 kmalloc_reserve+0x13d/0x4a0 net/ n\u00facleo/ skbuff.c:559 __alloc_skb+0x318/0x740 net/core/skbuff.c:650 alloc_skb include/linux/skbuff.h:1286 [en l\u00ednea] netlink_alloc_large_skb net/netlink/af_netlink.c:1214 [en l\u00ednea] netlink_sendmsg+0xb34/0x13d0 net/netlink/af_netlink.c:1885 sock_sendmsg_nosec net/socket.c:730 [en l\u00ednea] sock_sendmsg net/socket.c:753 [en l\u00ednea] ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2541 ___sys_sendmsg+0x28d/0x3c0 net/ socket.c:2595 __sys_sendmsg net/socket.c:2624 [en l\u00ednea] __do_sys_sendmsg net/socket.c:2633 [en l\u00ednea] __se_sys_sendmsg net/socket.c:2631 [en l\u00ednea] __x64_sys_sendmsg+0x307/0x490 :2631 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 Entry_SYSCALL_64_after_hwframe+0x63/0xcd Los nombres relacionados con el portador TIPC, incluidos los nombres de enlaces, deben ser cadenas terminadas en nulo . Si un nombre de enlace que no termina en nulo se pasa a trav\u00e9s de netlink, strstr() y funciones similares pueden provocar una saturaci\u00f3n del b\u00fafer. Esto causa el problema anterior. Este parche cambia la nla_policy para nombres relacionados con el portador de NLA_STRING a NLA_NUL_STRING. Esto resuelve el problema garantizando que s\u00f3lo se acepten cadenas terminadas en nulo como nombres relacionados con el portador. syzbot inform\u00f3 un problema similar de valor uninitario relacionado con los nombres de los portadores [2]. La causa principal de este problema es que se pas\u00f3 un nombre de portador no terminado en nulo. Este parche tambi\u00e9n resolvi\u00f3 este problema.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/19b3f72a41a8751e26bffc093bb7e1cef29ad579\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2199260c42e6fbc5af8adae3bf78e623407c91b0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2426425d686b43adbc4f2f4a367b494f06f159d6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3907b89cd17fcc23e9a80789c36856f00ece0ba8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4c731e98fe4d678e87ba3e4d45d3cf0a5a193dc4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/560992f41c0cea44b7603bc9e6c73bffbf6b5709\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6744008c354bca2e4686a5b6056ee6b535d9f67d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/abc1582119e8c4af14cedb0db6541fd603f45a04\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b33d130f07f1decd756b849ab03c23d11d4dd294\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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