CVE-2024-42271— 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，该漏洞源于内存释放后重用。
可能的 ATT&CK 技术 1 AI
T1068 · Exploitation for Privilege Escalation影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 7d316b9453523498246e9e19a659c423d4c5081e< 84f40b46787ecb67c7ad08a5bb1376141fa10c01 |
affected |
7d316b9453523498246e9e19a659c423d4c5081e< 37652fbef9809411cea55ea5fa1a170e299efcd0 |
affected | ||
7d316b9453523498246e9e19a659c423d4c5081e< c65f72eec60a34ace031426e04e9aff8e5f04895 |
affected | ||
7d316b9453523498246e9e19a659c423d4c5081e< ac758e1f663fe9bc64f6b47212a2aa18697524f5 |
affected | ||
7d316b9453523498246e9e19a659c423d4c5081e< 8b424c9e44111c5a76f41c6b741f8d4c4179d876 |
affected | ||
7d316b9453523498246e9e19a659c423d4c5081e< 01437282fd3904810603f3dc98d2cac6b8b6fc84 |
affected | ||
7d316b9453523498246e9e19a659c423d4c5081e< 69620522c48ce8215e5eb55ffbab8cafee8f407d |
affected | ||
7d316b9453523498246e9e19a659c423d4c5081e< f558120cd709682b739207b48cf7479fd9568431 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2024-42271 基础信息
漏洞信息
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Vulnerability Title
net/iucv: fix use after free in iucv_sock_close()
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
net/iucv: fix use after free in iucv_sock_close()
iucv_sever_path() is called from process context and from bh context.
iucv->path is used as indicator whether somebody else is taking care of
severing the path (or it is already removed / never existed).
This needs to be done with atomic compare and swap, otherwise there is a
small window where iucv_sock_close() will try to work with a path that has
already been severed and freed by iucv_callback_connrej() called by
iucv_tasklet_fn().
Example:
[452744.123844] Call Trace:
[452744.123845] ([<0000001e87f03880>] 0x1e87f03880)
[452744.123966] [<00000000d593001e>] iucv_path_sever+0x96/0x138
[452744.124330] [<000003ff801ddbca>] iucv_sever_path+0xc2/0xd0 [af_iucv]
[452744.124336] [<000003ff801e01b6>] iucv_sock_close+0xa6/0x310 [af_iucv]
[452744.124341] [<000003ff801e08cc>] iucv_sock_release+0x3c/0xd0 [af_iucv]
[452744.124345] [<00000000d574794e>] __sock_release+0x5e/0xe8
[452744.124815] [<00000000d5747a0c>] sock_close+0x34/0x48
[452744.124820] [<00000000d5421642>] __fput+0xba/0x268
[452744.124826] [<00000000d51b382c>] task_work_run+0xbc/0xf0
[452744.124832] [<00000000d5145710>] do_notify_resume+0x88/0x90
[452744.124841] [<00000000d5978096>] system_call+0xe2/0x2c8
[452744.125319] Last Breaking-Event-Address:
[452744.125321] [<00000000d5930018>] iucv_path_sever+0x90/0x138
[452744.125324]
[452744.125325] Kernel panic - not syncing: Fatal exception in interrupt
Note that bh_lock_sock() is not serializing the tasklet context against
process context, because the check for sock_owned_by_user() and
corresponding handling is missing.
Ideas for a future clean-up patch:
A) Correct usage of bh_lock_sock() in tasklet context, as described in
Re-enqueue, if needed. This may require adding return values to the
tasklet functions and thus changes to all users of iucv.
B) Change iucv tasklet into worker and use only lock_sock() in af_iucv.
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，该漏洞源于内存释放后重用。
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-2024-42271 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
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CVE-2024-42271 其他参考 (8)
同批安全公告 · Linux · 2024-08-17 · 共 109 条
| CVE-2024-42285 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-42284 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-42318 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-42287 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-43847 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-43848 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-42299 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-42314 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-42297 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-43840 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-42296 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-43832 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-42293 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-43830 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-42300 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-43845 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-42288 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-43846 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-42280 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-43816 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 109 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2024-42271
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