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CVE-2024-35871— 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 riscv 模块存在内核 gp 泄漏。

AI 预测 7.8 利用难度: 困难 EPSS 0.27% · P17

影响版本矩阵 14

厂商产品 版本范围状态
Linux Linux 7db91e57a0acde126a162ababfb1e0ab190130cb< 9abc3e6f1116adb7a2d4fbb8ce20c37916976bf5 affected
7db91e57a0acde126a162ababfb1e0ab190130cb< dff6072124f6df77bfd36951fbd88565746980ef affected
7db91e57a0acde126a162ababfb1e0ab190130cb< f6583444d7e78dae750798552b65a2519ff3ca84 affected
7db91e57a0acde126a162ababfb1e0ab190130cb< 00effef72c98294edb1efa87ffa0f6cfb61b36a4 affected
7db91e57a0acde126a162ababfb1e0ab190130cb< d8dcba0691b8e42bddb61aab201e4d918a08e5d9 affected
7db91e57a0acde126a162ababfb1e0ab190130cb< d14fa1fcf69db9d070e75f1c4425211fa619dfc8 affected
4.15 affected
< 4.15 unaffected
… +6 条更多
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一、 漏洞 CVE-2024-35871 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！
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Vulnerability Title
riscv: process: Fix kernel gp leakage
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: riscv: process: Fix kernel gp leakage childregs represents the registers which are active for the new thread in user context. For a kernel thread, childregs->gp is never used since the kernel gp is not touched by switch_to. For a user mode helper, the gp value can be observed in user space after execve or possibly by other means. [From the email thread] The /* Kernel thread */ comment is somewhat inaccurate in that it is also used for user_mode_helper threads, which exec a user process, e.g. /sbin/init or when /proc/sys/kernel/core_pattern is a pipe. Such threads do not have PF_KTHREAD set and are valid targets for ptrace etc. even before they exec. childregs is the *user* context during syscall execution and it is observable from userspace in at least five ways: 1. kernel_execve does not currently clear integer registers, so the starting register state for PID 1 and other user processes started by the kernel has sp = user stack, gp = kernel __global_pointer$, all other integer registers zeroed by the memset in the patch comment. This is a bug in its own right, but I'm unwilling to bet that it is the only way to exploit the issue addressed by this patch. 2. ptrace(PTRACE_GETREGSET): you can PTRACE_ATTACH to a user_mode_helper thread before it execs, but ptrace requires SIGSTOP to be delivered which can only happen at user/kernel boundaries. 3. /proc/*/task/*/syscall: this is perfectly happy to read pt_regs for user_mode_helpers before the exec completes, but gp is not one of the registers it returns. 4. PERF_SAMPLE_REGS_USER: LOCKDOWN_PERF normally prevents access to kernel addresses via PERF_SAMPLE_REGS_INTR, but due to this bug kernel addresses are also exposed via PERF_SAMPLE_REGS_USER which is permitted under LOCKDOWN_PERF. I have not attempted to write exploit code. 5. Much of the tracing infrastructure allows access to user registers. I have not attempted to determine which forms of tracing allow access to user registers without already allowing access to kernel registers.
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 riscv 模块存在内核 gp 泄漏。
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

厂商 产品 影响版本 CPE 订阅
Linux Linux 7db91e57a0acde126a162ababfb1e0ab190130cb ~ 9abc3e6f1116adb7a2d4fbb8ce20c37916976bf5 -
Linux Linux 4.15 -

二、漏洞 CVE-2024-35871 的公开POC

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三、漏洞 CVE-2024-35871 的情报信息

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CVE-2024-35871 邮件列表归档 (1)

CVE-2024-35871 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-2024-35884 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-2024-35919 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-35931 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-35890 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-35920 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-35921 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-35897 7.8 HIGH Linux kernel 安全漏洞

显示前 20 条，共 82 条。 查看全部 &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-35871

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