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Non-empty default inheritable capabilities for linux container in Buildah

Moderate severity GitHub Reviewed Published Mar 30, 2022 in containers/buildah • Updated Feb 14, 2023

Package

gomod github.com/containers/buildah (Go)

Affected versions

< 1.25.0

Patched versions

1.25.0

Description

A bug was found in Buildah where containers were created with non-empty inheritable Linux process capabilities, creating an atypical Linux environment and enabling programs with inheritable file capabilities to elevate those capabilities to the permitted set during execve(2).

This bug did not affect the container security sandbox as the inheritable set never contained more capabilities than were included in the container's bounding set.

References

@giuseppe giuseppe published to containers/buildah Mar 30, 2022
Published to the GitHub Advisory Database Apr 1, 2022
Reviewed Apr 1, 2022
Published by the National Vulnerability Database Apr 4, 2022
Last updated Feb 14, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

EPSS score

0.134%
(50th percentile)

Weaknesses

CVE ID

CVE-2022-27651

GHSA ID

GHSA-c3g4-w6cv-6v7h

Source code

Credits

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