CVE-2023-28642: AppArmor bypass with symlinked /proc in runc
First published: Wed Mar 29 2023(Updated: )
### Impact It was found that AppArmor, and potentially SELinux, can be bypassed when `/proc` inside the container is symlinked with a specific mount configuration. ### Patches Fixed in runc v1.1.5, by prohibiting symlinked `/proc`: https://github.com/opencontainers/runc/pull/3785 This PR fixes CVE-2023-27561 as well. ### Workarounds Avoid using an untrusted container image.
Credit: security-advisories@github.com security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/runc | <1.1.5 | 1.1.5 |
| Linuxfoundation Runc | <1.1.5 | |
| debian/runc | <=1.0.0~rc93+ds1-5+deb11u3 | 1.0.0~rc93+ds1-5+deb11u5 1.1.5+ds1-1+deb12u1 1.1.15+ds1-1 |
| go/github.com/opencontainers/runc | <1.1.5 | 1.1.5 |
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Reference Links
- https://github.com/opencontainers/runc/pull/3785
- https://github.com/opencontainers/runc/security/advisories/GHSA-g2j6-57v7-gm8c
- https://launchpad.net/bugs/cve/CVE-2023-28642
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2192149
- https://access.redhat.com/errata/RHSA-2023:1326
- https://access.redhat.com/errata/RHSA-2023:6380
- https://access.redhat.com/errata/RHSA-2023:6938
- https://access.redhat.com/errata/RHSA-2023:6939
- https://access.redhat.com/errata/RHSA-2024:0564
- https://bugzilla.redhat.com/show_bug.cgi?id=2182883
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-28642
- https://nvd.nist.gov/vuln/detail/CVE-2023-28642
- https://security-tracker.debian.org/tracker/CVE-2023-28642
- https://ubuntu.com/security/CVE-2023-28642
- https://security.netapp.com/advisory/ntap-20241206-0005
- https://github.com/advisories/GHSA-g2j6-57v7-gm8c (Advisory)
- https://security.netapp.com/advisory/ntap-20241206-0005/
Frequently Asked Questions
What is CVE-2023-28642?
CVE-2023-28642 is a vulnerability found in the runc CLI tool, which allows bypassing of AppArmor security when `/proc` inside a container is symlinked with a specific mount configuration.
What is the severity of CVE-2023-28642?
CVE-2023-28642 has a severity rating of medium with a severity value of 4.
How can the CVE-2023-28642 vulnerability be fixed?
The CVE-2023-28642 vulnerability can be fixed by upgrading to runc version 1.1.5 or higher.
Where can I find more information about CVE-2023-28642?
You can find more information about CVE-2023-28642 on the official GitHub page of runc and the Open Containers Initiative (OCI) security advisories.
What is the affected software for CVE-2023-28642?
The affected software for CVE-2023-28642 includes runc version 1.0.0~ up to but excluding 1.1.5.
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