CVE-2024-46828— 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，该漏洞源于允许数组越界。
可能的 ATT&CK 技术 1 AI
T1203 · Exploitation for Client Execution影响版本矩阵 16
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 712639929912c5eefb09facccb48d55b3f72c9f8< 4a4eeefa514db570be025ab46d779af180e2c9bb |
affected |
712639929912c5eefb09facccb48d55b3f72c9f8< 7725152b54d295b7da5e34c2f419539b30d017bd |
affected | ||
712639929912c5eefb09facccb48d55b3f72c9f8< cde71a5677971f4f1b69b25e854891dbe78066a4 |
affected | ||
712639929912c5eefb09facccb48d55b3f72c9f8< 549e407569e08459d16122341d332cb508024094 |
affected | ||
712639929912c5eefb09facccb48d55b3f72c9f8< d4a9039a7b3d8005b90c7b1a55a306444f0e5447 |
affected | ||
712639929912c5eefb09facccb48d55b3f72c9f8< d7c01c0714c04431b5e18cf17a9ea68a553d1c3c |
affected | ||
712639929912c5eefb09facccb48d55b3f72c9f8< 546ea84d07e3e324644025e2aae2d12ea4c5896e |
affected | ||
5.1 |
affected | ||
| … +8 条更多 | |||
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一、 漏洞 CVE-2024-46828 基础信息
漏洞信息
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Vulnerability Title
sched: sch_cake: fix bulk flow accounting logic for host fairness
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
sched: sch_cake: fix bulk flow accounting logic for host fairness
In sch_cake, we keep track of the count of active bulk flows per host,
when running in dst/src host fairness mode, which is used as the
round-robin weight when iterating through flows. The count of active
bulk flows is updated whenever a flow changes state.
This has a peculiar interaction with the hash collision handling: when a
hash collision occurs (after the set-associative hashing), the state of
the hash bucket is simply updated to match the new packet that collided,
and if host fairness is enabled, that also means assigning new per-host
state to the flow. For this reason, the bulk flow counters of the
host(s) assigned to the flow are decremented, before new state is
assigned (and the counters, which may not belong to the same host
anymore, are incremented again).
Back when this code was introduced, the host fairness mode was always
enabled, so the decrement was unconditional. When the configuration
flags were introduced the *increment* was made conditional, but
the *decrement* was not. Which of course can lead to a spurious
decrement (and associated wrap-around to U16_MAX).
AFAICT, when host fairness is disabled, the decrement and wrap-around
happens as soon as a hash collision occurs (which is not that common in
itself, due to the set-associative hashing). However, in most cases this
is harmless, as the value is only used when host fairness mode is
enabled. So in order to trigger an array overflow, sch_cake has to first
be configured with host fairness disabled, and while running in this
mode, a hash collision has to occur to cause the overflow. Then, the
qdisc has to be reconfigured to enable host fairness, which leads to the
array out-of-bounds because the wrapped-around value is retained and
used as an array index. It seems that syzbot managed to trigger this,
which is quite impressive in its own right.
This patch fixes the issue by introducing the same conditional check on
decrement as is used on increment.
The original bug predates the upstreaming of cake, but the commit listed
in the Fixes tag touched that code, meaning that this patch won't apply
before that.
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:N/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，该漏洞源于允许数组越界。
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-2024-46828 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2024-46828 其他参考 (7)
同批安全公告 · Linux · 2024-09-27 · 共 66 条
| CVE-2024-46865 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-46831 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-46823 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-46858 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-46862 | 8.0 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-46845 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-46866 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-46816 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-46813 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-46812 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-46818 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-46859 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-46830 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-46852 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-46850 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-46834 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-46847 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-46842 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-46803 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-46855 | 7.5 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 66 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2024-46828
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