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CVE-2023-28642— AppArmor bypass with symlinked /proc in runc

Quick assessment

Affected
opencontainers runc
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.

runc是一款用于根据OCI规范生成和运行容器的CLI（命令行界面）工具。 runc 1.1.5之前版本存在安全漏洞，该漏洞源于当容器内的/proc与特定的挂载配置进行符号链接时可以绕过AppArmor。

CVSS 6.1 · Medium EPSS 0.34% · P25

Possible ATT&CK Techniques 1 AI

T1611 · Escape to Host
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I. Basic Information for CVE-2023-28642

Vulnerability Information
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Vulnerability Title
AppArmor bypass with symlinked /proc in runc
Source: CVE Program / CVE List V5
Vulnerability Description
runc is a CLI tool for spawning and running containers according to the OCI specification. It was found that AppArmor can be bypassed when `/proc` inside the container is symlinked with a specific mount configuration. This issue has been fixed in runc version 1.1.5, by prohibiting symlinked `/proc`. See PR #3785 for details. users are advised to upgrade. Users unable to upgrade should avoid using an untrusted container image.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
权限预留不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
runc 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
runc是一款用于根据OCI规范生成和运行容器的CLI（命令行界面）工具。 runc 1.1.5之前版本存在安全漏洞，该漏洞源于当容器内的/proc与特定的挂载配置进行符号链接时可以绕过AppArmor。
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
opencontainers runc < 1.1.5 -

II. Public POCs for CVE-2023-28642

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III. Intelligence Information for CVE-2023-28642

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Patches & Fixes for CVE-2023-28642 (1)

Vendor Advisories for CVE-2023-28642 (1)

IV. Related Vulnerabilities

Same product: runc
Same vendor: opencontainers
Same weakness: CWE-281

V. Comments for CVE-2023-28642

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