CVE-2024-36937— 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 xdp 模块存在漏洞。
可能的 ATT&CK 技术 1 AI
T1203 · Exploitation for Client Execution影响版本矩阵 12
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | e624d4ed4aa8cc3c69d1359b0aaea539203ed266< 12481f30128fbebc2eeb55eb2d56390fdfa30c5e |
affected |
e624d4ed4aa8cc3c69d1359b0aaea539203ed266< 272bfb019f3cc018f654b992115774e77b4f3ffc |
affected | ||
e624d4ed4aa8cc3c69d1359b0aaea539203ed266< e22e25820fa04ea5eaac4ef7ee200e9923f466a4 |
affected | ||
e624d4ed4aa8cc3c69d1359b0aaea539203ed266< 6fd81f9d333e7b3532036577b1beb74ba1323553 |
affected | ||
e624d4ed4aa8cc3c69d1359b0aaea539203ed266< 5bcf0dcbf9066348058b88a510c57f70f384c92c |
affected | ||
5.14 |
affected | ||
< 5.14 |
unaffected | ||
5.15.159≤ 5.15.* |
unaffected | ||
| … +4 条更多 | |||
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一、 漏洞 CVE-2024-36937 基础信息
漏洞信息
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Vulnerability Title
xdp: use flags field to disambiguate broadcast redirect
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
xdp: use flags field to disambiguate broadcast redirect
When redirecting a packet using XDP, the bpf_redirect_map() helper will set
up the redirect destination information in struct bpf_redirect_info (using
the __bpf_xdp_redirect_map() helper function), and the xdp_do_redirect()
function will read this information after the XDP program returns and pass
the frame on to the right redirect destination.
When using the BPF_F_BROADCAST flag to do multicast redirect to a whole
map, __bpf_xdp_redirect_map() sets the 'map' pointer in struct
bpf_redirect_info to point to the destination map to be broadcast. And
xdp_do_redirect() reacts to the value of this map pointer to decide whether
it's dealing with a broadcast or a single-value redirect. However, if the
destination map is being destroyed before xdp_do_redirect() is called, the
map pointer will be cleared out (by bpf_clear_redirect_map()) without
waiting for any XDP programs to stop running. This causes xdp_do_redirect()
to think that the redirect was to a single target, but the target pointer
is also NULL (since broadcast redirects don't have a single target), so
this causes a crash when a NULL pointer is passed to dev_map_enqueue().
To fix this, change xdp_do_redirect() to react directly to the presence of
the BPF_F_BROADCAST flag in the 'flags' value in struct bpf_redirect_info
to disambiguate between a single-target and a broadcast redirect. And only
read the 'map' pointer if the broadcast flag is set, aborting if that has
been cleared out in the meantime. This prevents the crash, while keeping
the atomic (cmpxchg-based) clearing of the map pointer itself, and without
adding any more checks in the non-broadcast fast path.
来源: CVE Program / CVE List V5
CVSS Information
N/A
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 xdp 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-2024-36937 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2024-36937 其他参考 (5)
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-2024-36913 | 9.3 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-36909 | 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-2024-36933 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36904 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36914 | 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-2024-36894 | 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-2024-36928 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36884 | 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-2024-36937
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