CVE-2024-47742— 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firmware_loader组件中对路径遍历的不当处理。
影响版本矩阵 20
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | abb139e75c2cdbb955e840d6331cb5863e409d0e< d1768e5535d3ded59f888637016e6f821f4e069f |
affected |
abb139e75c2cdbb955e840d6331cb5863e409d0e< 9b1ca33ebd05b3acef5b976c04e5e791af93ce1b |
affected | ||
abb139e75c2cdbb955e840d6331cb5863e409d0e< c30558e6c5c9ad6c86459d9acce1520ceeab9ea6 |
affected | ||
abb139e75c2cdbb955e840d6331cb5863e409d0e< a77fc4acfd49fc6076e565445b2bc5fdc3244da4 |
affected | ||
abb139e75c2cdbb955e840d6331cb5863e409d0e< 3d2411f4edcb649eaf232160db459bb4770b5251 |
affected | ||
abb139e75c2cdbb955e840d6331cb5863e409d0e< 7420c1bf7fc784e587b87329cc6dfa3dca537aa4 |
affected | ||
abb139e75c2cdbb955e840d6331cb5863e409d0e< 28f1cd94d3f1092728fb775a0fe26c5f1ac2ebeb |
affected | ||
abb139e75c2cdbb955e840d6331cb5863e409d0e< 6c4e13fdfcab34811c3143a0a03c05fec4e870ec |
affected | ||
| … +12 条更多 | |||
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一、 漏洞 CVE-2024-47742 基础信息
漏洞信息
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Vulnerability Title
firmware_loader: Block path traversal
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
firmware_loader: Block path traversal
Most firmware names are hardcoded strings, or are constructed from fairly
constrained format strings where the dynamic parts are just some hex
numbers or such.
However, there are a couple codepaths in the kernel where firmware file
names contain string components that are passed through from a device or
semi-privileged userspace; the ones I could find (not counting interfaces
that require root privileges) are:
- lpfc_sli4_request_firmware_update() seems to construct the firmware
filename from "ModelName", a string that was previously parsed out of
some descriptor ("Vital Product Data") in lpfc_fill_vpd()
- nfp_net_fw_find() seems to construct a firmware filename from a model
name coming from nfp_hwinfo_lookup(pf->hwinfo, "nffw.partno"), which I
think parses some descriptor that was read from the device.
(But this case likely isn't exploitable because the format string looks
like "netronome/nic_%s", and there shouldn't be any *folders* starting
with "netronome/nic_". The previous case was different because there,
the "%s" is *at the start* of the format string.)
- module_flash_fw_schedule() is reachable from the
ETHTOOL_MSG_MODULE_FW_FLASH_ACT netlink command, which is marked as
GENL_UNS_ADMIN_PERM (meaning CAP_NET_ADMIN inside a user namespace is
enough to pass the privilege check), and takes a userspace-provided
firmware name.
(But I think to reach this case, you need to have CAP_NET_ADMIN over a
network namespace that a special kind of ethernet device is mapped into,
so I think this is not a viable attack path in practice.)
Fix it by rejecting any firmware names containing ".." path components.
For what it's worth, I went looking and haven't found any USB device
drivers that use the firmware loader dangerously.
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firmware_loader组件中对路径遍历的不当处理。
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-2024-47742 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2024-47742 补丁与修复 (8)
同批安全公告 · Linux · 2024-10-21 · 共 372 条
| CVE-2022-48985 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-49855 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-50033 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-49003 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-47695 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-50046 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-50047 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-50043 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-49996 | 9.4 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-47678 | 9.4 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-49950 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-49936 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49017 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49015 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-49939 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-50041 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-49930 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48967 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48964 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48962 | 8.8 HIGH | Linux kernel 安全漏洞 |
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IV. Related Vulnerabilities
V. Comments for CVE-2024-47742
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