GHSA-vf95-55w6-qmrf
Suggest an improvement- Source
- https://github.com/advisories/GHSA-vf95-55w6-qmrf
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/11/GHSA-vf95-55w6-qmrf/GHSA-vf95-55w6-qmrf.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/GHSA-vf95-55w6-qmrf
- Aliases
- Published
- 2025-11-05T18:45:18Z
- Modified
- 2025-11-06T15:29:58Z
- 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 and denial of service due to arbitrary write gadgets and procfs write redirects
- Details
-
Impact
youki’s apparmor handling performs insufficiently strict write-target validation, which—combined with path substitution during pathname resolution—can allow writes to unintended procfs locations.
Weak write-target check youki only verifies that the destination lies somewhere under procfs. As a result, a write intended for
/proc/self/attr/apparmor/execcan succeed even if the path has been redirected to/proc/sys/kernel/hostname(which is also in procfs).Path substitution While resolving a path component-by-component, a shared-mount race can substitute intermediate components and redirect the final target.
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-cgrx-mc8f-2prm
Credits
Thanks to Li Fubang (@lifubang from acmcoder.com, CIIC) and Tõnis Tiigi (@tonistiigi from Docker) for both independently discovering runc's original vulnerability, as well as Aleksa Sarai (@cyphar from SUSE) for the original research into this class of security issues and solutions.
- Database specific
{ "cwe_ids": [ "CWE-363", "CWE-61" ], "nvd_published_at": "2025-11-06T00:15:37Z", "severity": "HIGH", "github_reviewed": true, "github_reviewed_at": "2025-11-05T18:45:18Z" }- References
-
- https://github.com/opencontainers/runc/security/advisories/GHSA-cgrx-mc8f-2prm
- https://github.com/youki-dev/youki/security/advisories/GHSA-vf95-55w6-qmrf
- https://nvd.nist.gov/vuln/detail/CVE-2025-62596
- https://github.com/youki-dev/youki/commit/5886c91073b9be748bd8d5aed49c4a820548030a
- https://github.com/youki-dev/youki
- https://pkg.go.dev/github.com/cyphar/filepath-securejoin/pathrs-lite/procfs
- https://youtu.be/tGseJW_uBB8
- https://youtu.be/y1PaBzxwRWQ
Affected packages
crates.io / youki
Package
- Name
- youki
- View open source insights on deps.dev
- Purl
- pkg:cargo/youki