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Security Advisories: GSA_kwCzR0hTQS1jbTl4LWMzcmgtN3JjNM4AAwpl
CRI-O vulnerable to /etc/passwd tampering resulting in Privilege Escalation
Impact
It is possible to craft an environment variable with newlines to add entries to a container's /etc/passwd. It is possible to circumvent admission validation of username/UID by adding such an entry.
Note: because the pod author is in control of the container's /etc/passwd, this is not considered a new risk factor. However, this advisory is being opened for transparency and as a way of tracking fixes.
Patches
1.26.0 will have the fix. More patches will be posted as they're available.
Workarounds
Additional security controls like SELinux should prevent any damage a container is able to do with root on the host. Using SELinux is recommended because this class of attack is already possible by manually editing the container's /etc/passwd
References
Permalink: https://github.com/advisories/GHSA-cm9x-c3rh-7rc4JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1jbTl4LWMzcmgtN3JjNM4AAwpl
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: over 1 year ago
Updated: 5 months ago
CVSS Score: 6.1
CVSS vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:H/A:N
Identifiers: GHSA-cm9x-c3rh-7rc4, CVE-2022-4318
References:
- https://github.com/cri-o/cri-o/security/advisories/GHSA-cm9x-c3rh-7rc4
- https://github.com/cri-o/cri-o/pull/6450
- https://nvd.nist.gov/vuln/detail/CVE-2022-4318
- https://access.redhat.com/errata/RHSA-2023:1033
- https://access.redhat.com/errata/RHSA-2023:1503
- https://access.redhat.com/security/cve/CVE-2022-4318
- https://bugzilla.redhat.com/show_bug.cgi?id=2152703
- https://github.com/advisories/GHSA-cm9x-c3rh-7rc4
Blast Radius: 10.9
Affected Packages
go:github.com/cri-o/cri-o
Dependent packages: 1Dependent repositories: 61
Downloads:
Affected Version Ranges: < 1.26.0
Fixed in: 1.26.0
All affected versions: 0.0.0, 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5, 1.0.6, 1.0.7, 1.0.8, 1.0.9, 1.8.0, 1.8.1, 1.8.2, 1.8.3, 1.8.4, 1.8.5, 1.9.0, 1.9.1, 1.9.2, 1.9.3, 1.9.4, 1.9.5, 1.9.6, 1.9.7, 1.9.8, 1.9.9, 1.9.10, 1.9.11, 1.9.12, 1.9.13, 1.9.14, 1.9.15, 1.9.16, 1.10.0, 1.10.1, 1.10.2, 1.10.3, 1.10.4, 1.10.5, 1.10.6, 1.11.0, 1.11.1, 1.11.2, 1.11.3, 1.11.4, 1.11.5, 1.11.6, 1.11.7, 1.11.8, 1.11.9, 1.11.10, 1.11.11, 1.11.12, 1.11.13, 1.11.14, 1.11.15, 1.12.0, 1.12.1, 1.12.2, 1.12.3, 1.12.4, 1.12.5, 1.12.6, 1.12.7, 1.12.8, 1.12.9, 1.12.10, 1.13.0, 1.13.1, 1.13.2, 1.13.3, 1.13.4, 1.13.5, 1.13.6, 1.13.7, 1.13.8, 1.13.9, 1.13.10, 1.13.11, 1.13.12, 1.14.0, 1.14.1, 1.14.2, 1.14.3, 1.14.4, 1.14.5, 1.14.6, 1.14.7, 1.14.8, 1.14.9, 1.14.10, 1.14.11, 1.14.12, 1.15.0, 1.15.1, 1.15.2, 1.15.3, 1.15.4, 1.16.0, 1.16.1, 1.16.2, 1.16.3, 1.16.4, 1.16.5, 1.16.6, 1.17.0, 1.17.1, 1.17.2, 1.17.3, 1.17.4, 1.17.5, 1.18.0, 1.18.1, 1.18.2, 1.18.3, 1.18.4, 1.18.5, 1.18.6, 1.19.0, 1.19.1, 1.19.2, 1.19.3, 1.19.4, 1.19.5, 1.19.6, 1.20.0, 1.20.1, 1.20.2, 1.20.3, 1.20.4, 1.20.5, 1.20.6, 1.20.7, 1.20.9, 1.21.0, 1.21.1, 1.21.2, 1.21.3, 1.21.4, 1.21.5, 1.21.6, 1.21.7, 1.22.0, 1.22.1, 1.22.2, 1.22.3, 1.22.4, 1.22.5, 1.23.0, 1.23.1, 1.23.2, 1.23.3, 1.23.4, 1.23.5, 1.24.0, 1.24.1, 1.24.2, 1.24.3, 1.24.4, 1.24.5, 1.24.6, 1.25.0, 1.25.1, 1.25.2, 1.25.3, 1.25.4, 1.25.5
All unaffected versions: 1.26.0, 1.26.1, 1.26.2, 1.26.3, 1.26.4, 1.27.0, 1.27.1, 1.27.2, 1.27.3, 1.27.4, 1.28.0, 1.28.1, 1.28.2, 1.28.3, 1.28.4, 1.29.0, 1.29.1, 1.29.2