CVE-2024-35982— 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，该漏洞源于所连接接口之一的 MTU 变得太小，从而无法传输本地转换表。
可能的 ATT&CK 技术 1 AI
T1499 · Endpoint Denial of Service影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | a19d3d85e1b854e4a483a55d740a42458085560d< 04720ea2e6c64459a90ca28570ea78335eccd924 |
affected |
a19d3d85e1b854e4a483a55d740a42458085560d< b3ddf6904073990492454b1dd1c10a24be8c74c6 |
affected | ||
a19d3d85e1b854e4a483a55d740a42458085560d< 70a8be9dc2fb65d67f8c1e0c88c587e08e2e575d |
affected | ||
a19d3d85e1b854e4a483a55d740a42458085560d< 87b6af1a7683e021710c08fc0551fc078346032f |
affected | ||
a19d3d85e1b854e4a483a55d740a42458085560d< 3fe79b2c83461edbbf86ed8a6f3924820ff89259 |
affected | ||
a19d3d85e1b854e4a483a55d740a42458085560d< 4ca2a5fb54ea2cc43edea614207fcede562d91c2 |
affected | ||
a19d3d85e1b854e4a483a55d740a42458085560d< ca54e2671548616ad34885f90d4f26f7adb088f0 |
affected | ||
a19d3d85e1b854e4a483a55d740a42458085560d< b1f532a3b1e6d2e5559c7ace49322922637a28aa |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2024-35982 基础信息
漏洞信息
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Vulnerability Title
batman-adv: Avoid infinite loop trying to resize local TT
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
batman-adv: Avoid infinite loop trying to resize local TT
If the MTU of one of an attached interface becomes too small to transmit
the local translation table then it must be resized to fit inside all
fragments (when enabled) or a single packet.
But if the MTU becomes too low to transmit even the header + the VLAN
specific part then the resizing of the local TT will never succeed. This
can for example happen when the usable space is 110 bytes and 11 VLANs are
on top of batman-adv. In this case, at least 116 byte would be needed.
There will just be an endless spam of
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (110)
in the log but the function will never finish. Problem here is that the
timeout will be halved all the time and will then stagnate at 0 and
therefore never be able to reduce the table even more.
There are other scenarios possible with a similar result. The number of
BATADV_TT_CLIENT_NOPURGE entries in the local TT can for example be too
high to fit inside a packet. Such a scenario can therefore happen also with
only a single VLAN + 7 non-purgable addresses - requiring at least 120
bytes.
While this should be handled proactively when:
* interface with too low MTU is added
* VLAN is added
* non-purgeable local mac is added
* MTU of an attached interface is reduced
* fragmentation setting gets disabled (which most likely requires dropping
attached interfaces)
not all of these scenarios can be prevented because batman-adv is only
consuming events without the the possibility to prevent these actions
(non-purgable MAC address added, MTU of an attached interface is reduced).
It is therefore necessary to also make sure that the code is able to handle
also the situations when there were already incompatible system
configuration are present.
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，该漏洞源于所连接接口之一的 MTU 变得太小，从而无法传输本地转换表。
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-2024-35982 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2024-35982 邮件列表归档 (2)
CVE-2024-35982 其他参考 (8)
同批安全公告 · Linux · 2024-05-20 · 共 62 条
| CVE-2024-35969 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35987 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35980 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35948 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36001 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36007 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35993 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35994 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35990 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36009 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35968 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35958 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35954 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35951 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35950 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35949 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35979 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35999 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35971 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35998 | 7.5 HIGH | Linux kernel 安全漏洞 |
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IV. Related Vulnerabilities
V. Comments for CVE-2024-35982
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