CVE-2024-35884— 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，该漏洞源于允许非隧道 GSO skbs 在隧道中登陆。
影响版本矩阵 14
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 9fd1ff5d2ac7181844735806b0a703c942365291< 3391b157780bbedf8ef9f202cbf10ee90bf6b0f8 |
affected |
9fd1ff5d2ac7181844735806b0a703c942365291< d49ae15a5767d4e9ef8bbb79e42df1bfebc94670 |
affected | ||
9fd1ff5d2ac7181844735806b0a703c942365291< d12245080cb259d82b34699f6cd4ec11bdb688bd |
affected | ||
9fd1ff5d2ac7181844735806b0a703c942365291< 3001e7aa43d6691db2a878b0745b854bf12ddd19 |
affected | ||
9fd1ff5d2ac7181844735806b0a703c942365291< 35fe0e0b5c00bef7dde74842a2564c43856fbce4 |
affected | ||
9fd1ff5d2ac7181844735806b0a703c942365291< 3d010c8031e39f5fa1e8b13ada77e0321091011f |
affected | ||
5.6 |
affected | ||
< 5.6 |
unaffected | ||
| … +6 条更多 | |||
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一、 漏洞 CVE-2024-35884 基础信息
漏洞信息
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Vulnerability Title
udp: do not accept non-tunnel GSO skbs landing in a tunnel
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
udp: do not accept non-tunnel GSO skbs landing in a tunnel
When rx-udp-gro-forwarding is enabled UDP packets might be GROed when
being forwarded. If such packets might land in a tunnel this can cause
various issues and udp_gro_receive makes sure this isn't the case by
looking for a matching socket. This is performed in
udp4/6_gro_lookup_skb but only in the current netns. This is an issue
with tunneled packets when the endpoint is in another netns. In such
cases the packets will be GROed at the UDP level, which leads to various
issues later on. The same thing can happen with rx-gro-list.
We saw this with geneve packets being GROed at the UDP level. In such
case gso_size is set; later the packet goes through the geneve rx path,
the geneve header is pulled, the offset are adjusted and frag_list skbs
are not adjusted with regard to geneve. When those skbs hit
skb_fragment, it will misbehave. Different outcomes are possible
depending on what the GROed skbs look like; from corrupted packets to
kernel crashes.
One example is a BUG_ON[1] triggered in skb_segment while processing the
frag_list. Because gso_size is wrong (geneve header was pulled)
skb_segment thinks there is "geneve header size" of data in frag_list,
although it's in fact the next packet. The BUG_ON itself has nothing to
do with the issue. This is only one of the potential issues.
Looking up for a matching socket in udp_gro_receive is fragile: the
lookup could be extended to all netns (not speaking about performances)
but nothing prevents those packets from being modified in between and we
could still not find a matching socket. It's OK to keep the current
logic there as it should cover most cases but we also need to make sure
we handle tunnel packets being GROed too early.
This is done by extending the checks in udp_unexpected_gso: GSO packets
lacking the SKB_GSO_UDP_TUNNEL/_CSUM bits and landing in a tunnel must
be segmented.
[1] kernel BUG at net/core/skbuff.c:4408!
RIP: 0010:skb_segment+0xd2a/0xf70
__udp_gso_segment+0xaa/0x560
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/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，该漏洞源于允许非隧道 GSO skbs 在隧道中登陆。
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-2024-35884 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2024-35884 邮件列表归档 (1)
CVE-2024-35884 其他参考 (6)
同批安全公告 · Linux · 2024-05-19 · 共 82 条
| CVE-2024-35861 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-35862 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-35863 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-35864 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-35865 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-35870 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-35869 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-35939 | 9.3 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-35887 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35915 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35889 | 8.6 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35875 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35937 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35920 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35890 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35894 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35919 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35910 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35905 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35921 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 82 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2024-35884
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