CVE-2024-36933— Linux kernel 安全漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于 nsh 模块存在漏洞。
影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | c411ed854584a71b0e86ac3019b60e4789d88086< a7c2c3c1caabcb4a3d6c47284c397507aaf54fe9 |
affected |
c411ed854584a71b0e86ac3019b60e4789d88086< 46134031c20fd313d03b90169d64b2e05ca6b65c |
affected | ||
c411ed854584a71b0e86ac3019b60e4789d88086< bbccf0caef2fa917d6d0692385a06ce3c262a216 |
affected | ||
c411ed854584a71b0e86ac3019b60e4789d88086< 5a4603fbc285752d19e4b415466db18ef3617e4a |
affected | ||
c411ed854584a71b0e86ac3019b60e4789d88086< 37ed6f244ec5bda2e90b085084e322ea55d0aaa2 |
affected | ||
c411ed854584a71b0e86ac3019b60e4789d88086< 696d18bb59727a2e0526c0802a812620be1c9340 |
affected | ||
c411ed854584a71b0e86ac3019b60e4789d88086< 29a07f2ee4d273760c2acbfc756e29eccd82470a |
affected | ||
c411ed854584a71b0e86ac3019b60e4789d88086< 4b911a9690d72641879ea6d13cce1de31d346d79 |
affected | ||
| … +10 条更多 | |||
获取后续新漏洞提醒
登录后订阅
一、 漏洞 CVE-2024-36933 基础信息
漏洞信息
对漏洞内容有疑问？看看神龙的深度分析是否有帮助！
查看神龙十问 ↗
尽管我们使用了先进的大模型技术，但其输出仍可能包含不准确或过时的信息。神龙努力确保数据的准确性，但请您根据实际情况进行核实和判断。
Vulnerability Title
nsh: Restore skb->{protocol,data,mac_header} for outer header in nsh_gso_segment().
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
nsh: Restore skb->{protocol,data,mac_header} for outer header in nsh_gso_segment().
syzbot triggered various splats (see [0] and links) by a crafted GSO
packet of VIRTIO_NET_HDR_GSO_UDP layering the following protocols:
ETH_P_8021AD + ETH_P_NSH + ETH_P_IPV6 + IPPROTO_UDP
NSH can encapsulate IPv4, IPv6, Ethernet, NSH, and MPLS. As the inner
protocol can be Ethernet, NSH GSO handler, nsh_gso_segment(), calls
skb_mac_gso_segment() to invoke inner protocol GSO handlers.
nsh_gso_segment() does the following for the original skb before
calling skb_mac_gso_segment()
1. reset skb->network_header
2. save the original skb->{mac_heaeder,mac_len} in a local variable
3. pull the NSH header
4. resets skb->mac_header
5. set up skb->mac_len and skb->protocol for the inner protocol.
and does the following for the segmented skb
6. set ntohs(ETH_P_NSH) to skb->protocol
7. push the NSH header
8. restore skb->mac_header
9. set skb->mac_header + mac_len to skb->network_header
10. restore skb->mac_len
There are two problems in 6-7 and 8-9.
(a)
After 6 & 7, skb->data points to the NSH header, so the outer header
(ETH_P_8021AD in this case) is stripped when skb is sent out of netdev.
Also, if NSH is encapsulated by NSH + Ethernet (so NSH-Ethernet-NSH),
skb_pull() in the first nsh_gso_segment() will make skb->data point
to the middle of the outer NSH or Ethernet header because the Ethernet
header is not pulled by the second nsh_gso_segment().
(b)
While restoring skb->{mac_header,network_header} in 8 & 9,
nsh_gso_segment() does not assume that the data in the linear
buffer is shifted.
However, udp6_ufo_fragment() could shift the data and change
skb->mac_header accordingly as demonstrated by syzbot.
If this happens, even the restored skb->mac_header points to
the middle of the outer header.
It seems nsh_gso_segment() has never worked with outer headers so far.
At the end of nsh_gso_segment(), the outer header must be restored for
the segmented skb, instead of the NSH header.
To do that, let's calculate the outer header position relatively from
the inner header and set skb->{data,mac_header,protocol} properly.
[0]:
BUG: KMSAN: uninit-value in ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:524 [inline]
BUG: KMSAN: uninit-value in ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:602 [inline]
BUG: KMSAN: uninit-value in ipvlan_queue_xmit+0xf44/0x16b0 drivers/net/ipvlan/ipvlan_core.c:668
ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:524 [inline]
ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:602 [inline]
ipvlan_queue_xmit+0xf44/0x16b0 drivers/net/ipvlan/ipvlan_core.c:668
ipvlan_start_xmit+0x5c/0x1a0 drivers/net/ipvlan/ipvlan_main.c:222
__netdev_start_xmit include/linux/netdevice.h:4989 [inline]
netdev_start_xmit include/linux/netdevice.h:5003 [inline]
xmit_one net/core/dev.c:3547 [inline]
dev_hard_start_xmit+0x244/0xa10 net/core/dev.c:3563
__dev_queue_xmit+0x33ed/0x51c0 net/core/dev.c:4351
dev_queue_xmit include/linux/netdevice.h:3171 [inline]
packet_xmit+0x9c/0x6b0 net/packet/af_packet.c:276
packet_snd net/packet/af_packet.c:3081 [inline]
packet_sendmsg+0x8aef/0x9f10 net/packet/af_packet.c:3113
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
__sys_sendto+0x735/0xa10 net/socket.c:2191
__do_sys_sendto net/socket.c:2203 [inline]
__se_sys_sendto net/socket.c:2199 [inline]
__x64_sys_sendto+0x125/0x1c0 net/socket.c:2199
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
Uninit was created at:
slab_post_alloc_hook mm/slub.c:3819 [inline]
slab_alloc_node mm/slub.c:3860 [inline]
__do_kmalloc_node mm/slub.c:3980 [inline]
__kmalloc_node_track_caller+0x705/0x1000 mm/slub.c:4001
kmalloc_reserve+0x249/0x4a0 net/core/skbuff.c:582
__
---truncated---
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于 nsh 模块存在漏洞。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2024-36933 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
高级
未找到公开 POC。
登录以生成 AI POC三、漏洞 CVE-2024-36933 的情报信息
请登录查看更多情报信息。
CVE-2024-36933 邮件列表归档 (2)
CVE-2024-36933 其他参考 (7)
同批安全公告 · Linux · 2024-05-30 · 共 93 条
| CVE-2024-36958 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-36886 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-36911 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-36912 | 9.6 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-36909 | 9.3 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-36913 | 9.3 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-36922 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36921 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36910 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36032 | 8.1 HIGH | Linux kernel安全漏洞 |
| CVE-2024-36904 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36894 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36918 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36018 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36928 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36890 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36940 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36884 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36914 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36883 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 93 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2024-36933
暂无评论