ghsa-5p87-vhr3-gp4q
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
tipc: Change nla_policy for bearer-related names to NLA_NUL_STRING
syzbot reported the following uninit-value access issue [1]:
===================================================== BUG: KMSAN: uninit-value in strlen lib/string.c:418 [inline] BUG: KMSAN: uninit-value in strstr+0xb8/0x2f0 lib/string.c:756 strlen lib/string.c:418 [inline] 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 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1051 [inline] genl_rcv_msg+0x11ec/0x1290 net/netlink/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 [inline] 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 [inline] sock_sendmsg net/socket.c:753 [inline] _syssendmsg+0x9c2/0xd60 net/socket.c:2541 _sys_sendmsg+0x28d/0x3c0 net/socket.c:2595 __sys_sendmsg net/socket.c:2624 [inline] __do_sys_sendmsg net/socket.c:2633 [inline] __se_sys_sendmsg net/socket.c:2631 [inline] __x64_sys_sendmsg+0x307/0x490 net/socket.c: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
Uninit was created at: slab_post_alloc_hook+0x12f/0xb70 mm/slab.h:767 slab_alloc_node mm/slub.c:3478 [inline] kmem_cache_alloc_node+0x577/0xa80 mm/slub.c:3523 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:559 __alloc_skb+0x318/0x740 net/core/skbuff.c:650 alloc_skb include/linux/skbuff.h:1286 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1214 [inline] netlink_sendmsg+0xb34/0x13d0 net/netlink/af_netlink.c:1885 sock_sendmsg_nosec net/socket.c:730 [inline] sock_sendmsg net/socket.c:753 [inline] _syssendmsg+0x9c2/0xd60 net/socket.c:2541 _sys_sendmsg+0x28d/0x3c0 net/socket.c:2595 __sys_sendmsg net/socket.c:2624 [inline] __do_sys_sendmsg net/socket.c:2633 [inline] __se_sys_sendmsg net/socket.c:2631 [inline] __x64_sys_sendmsg+0x307/0x490 net/socket.c: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
TIPC bearer-related names including link names must be null-terminated strings. If a link name which is not null-terminated is passed through netlink, strstr() and similar functions can cause buffer overrun. This causes the above issue.
This patch changes the nla_policy for bearer-related names from NLA_STRING to NLA_NUL_STRING. This resolves the issue by ensuring that only null-terminated strings are accepted as bearer-related names.
syzbot reported similar uninit-value issue related to bearer names [2]. The root cause of this issue is that a non-null-terminated bearer name was passed. This patch also resolved this issue.
{
"affected": [],
"aliases": [
"CVE-2023-52845"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-21T16:15:21Z",
"severity": null
},
"details": "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.",
"id": "GHSA-5p87-vhr3-gp4q",
"modified": "2024-05-21T18:31:22Z",
"published": "2024-05-21T18:31:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52845"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/19b3f72a41a8751e26bffc093bb7e1cef29ad579"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2199260c42e6fbc5af8adae3bf78e623407c91b0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2426425d686b43adbc4f2f4a367b494f06f159d6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3907b89cd17fcc23e9a80789c36856f00ece0ba8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4c731e98fe4d678e87ba3e4d45d3cf0a5a193dc4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/560992f41c0cea44b7603bc9e6c73bffbf6b5709"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6744008c354bca2e4686a5b6056ee6b535d9f67d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/abc1582119e8c4af14cedb0db6541fd603f45a04"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b33d130f07f1decd756b849ab03c23d11d4dd294"
}
],
"schema_version": "1.4.0",
"severity": []
}
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.