CVE-2022-2785— Arbitrary Memory read in BPF Linux Kernel
Quick assessment
Affected
Linux Kernel Kernel
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
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 存在缓冲区错误漏洞，该漏洞源于BPF 内存在任意内存读取 - 用于填充传递给 bpf_sys_bpf 的结构中的指针的常量未经验证，可以指向任何地方，包括不属于 BPF 的内存，攻击者利用该漏洞可以从系统的任何位置任意读取内存。
Possible ATT&CK Techniques 1 AI
T1083 · File and Directory Discovery
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I. Basic Information for CVE-2022-2785
Vulnerability Information
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Vulnerability Title
Arbitrary Memory read in BPF Linux Kernel
Source: CVE Program / CVE List V5
Vulnerability Description
There exists an arbitrary memory read within the Linux Kernel BPF - Constants provided to fill pointers in structs passed in to bpf_sys_bpf are not verified and can point anywhere, including memory not owned by BPF. An attacker with CAP_BPF can arbitrarily read memory from anywhere on the system. We recommend upgrading past commit 86f44fcec22c
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
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 存在缓冲区错误漏洞，该漏洞源于BPF 内存在任意内存读取 - 用于填充传递给 bpf_sys_bpf 的结构中的指针的常量未经验证，可以指向任何地方，包括不属于 BPF 的内存，攻击者利用该漏洞可以从系统的任何位置任意读取内存。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Linux Kernel | Kernel | 5.14 ~ af2ac3e13e45 | - |
|
II. Public POCs for CVE-2022-2785
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2022-2785 (2)
-
https://git.kernel.org/bpf/bpf/c/86f44fcec22c x_refsource_MISC
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V. Comments for CVE-2022-2785
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