linuxfoundation runc CVE-2022-29162 vulnerability in Linux Foundation and Other Products
Published on May 17, 2022

Incorrect Default Permissions in runc

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runc is a CLI tool for spawning and running containers on Linux according to the OCI specification. A bug was found in runc prior to version 1.1.2 where `runc exec --cap` created processes 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. This bug has been fixed in runc 1.1.2. This fix changes `runc exec --cap` behavior such that the additional capabilities granted to the process being executed (as specified via `--cap` arguments) do not include inheritable capabilities. In addition, `runc spec` is changed to not set any inheritable capabilities in the created example OCI spec (`config.json`) file.

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Vulnerability Analysis

CVE-2022-29162 is exploitable with local system access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be low. considered to have a small impact on confidentiality and integrity and availability.

Attack Vector:
LOCAL
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
LOW
Integrity Impact:
LOW
Availability Impact:
LOW

Weakness Type

Incorrect Default Permissions

During installation, installed file permissions are set to allow anyone to modify those files.


Products Associated with CVE-2022-29162

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2022-29162 are published in these products:

Linux Foundation Runc
 
Fedora Project Fedora
 
Canonical Ubuntu Linux
 

Affected Versions

opencontainers runc Version < 1.1.2 is affected by CVE-2022-29162

Exploit Probability

EPSS
0.13%
Percentile
31.94%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.