GHSA-4g74-7cff-xcv8

Source

https://github.com/advisories/GHSA-4g74-7cff-xcv8

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/11/GHSA-4g74-7cff-xcv8/GHSA-4g74-7cff-xcv8.json

JSON Data

https://api.test.osv.dev/v1/vulns/GHSA-4g74-7cff-xcv8

Aliases

CVE-2025-62161

Published

2025-11-05T18:44:18Z

Modified

2025-11-06T15:29:34Z

Severity

7.3 (High) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H CVSS Calculator

Summary

youki container escape via "masked path" abuse due to mount race conditions

Details

Impact

youki utilizes bind mounting the container's /dev/null as a file mask. When performing this operation, the initial validation of the source /dev/null was insufficient. Specifically, we initially failed to verify whether /dev/null was genuinely present. However, we did perform validation to ensure that the /dev/null path existed within the container, including checking for symbolic links. Additionally, there was a vulnerability in the timing between validation and the actual mount operation.

As a result, by replacing /dev/null with a symbolic link, we can bind-mount arbitrary files from the host system.

This is a different project, but the core logic is similar to the CVE in runc. Issues were identified in runc, and verification was also conducted in youki to confirm the problems. https://github.com/opencontainers/runc/security/advisories/GHSA-9493-h29p-rfm2

Credits

Thanks to Lei Wang (@ssst0n3 from Huawei) for finding and reporting the original runc's vulnerability (Attack 1), and Li Fubang (@lifubang from acmcoder.com, CIIC) for discovering another attack vector in runc (Attack 2) based on @ssst0n3's initial findings.

Also, @cyphar helped youki in finding the problem.

Database specific

{
    "cwe_ids": [
        "CWE-363",
        "CWE-61"
    ],
    "github_reviewed": true,
    "nvd_published_at": "2025-11-06T00:15:36Z",
    "severity": "HIGH",
    "github_reviewed_at": "2025-11-05T18:44:18Z"
}

References

Affected packages

crates.io / youki

Package

Name: youki; View open source insights on deps.dev
Purl: pkg:cargo/youki

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0.5.7