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Vulnerability · Published Jan 16, 2024 · Assigned by redhat

CVE-2023-6395Mock: privilege escalation for users that can access mock configuration

Medium 6.7

In plain English

A medium-severity improper input validation in Extra Packages for Enterprise Linux from Fedora. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.6% (higher than 75% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.7Medium
Exploit odds (30 days)1.6%top 24.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

The Mock software contains a vulnerability wherein an attacker could potentially exploit privilege escalation, enabling the execution of arbitrary code with root user privileges. This weakness stems from the absence of proper sandboxing during the expansion and execution of Jinja2 templates, which may be included in certain configuration parameters. While the Mock documentation advises treating users added to the mock group as privileged, certain build systems invoking mock on behalf of users might inadvertently permit less privileged users to define configuration tags. These tags could then be passed as parameters to mock during execution, potentially leading to the utilization of Jinja2 templates for remote privilege escalation and the execution of arbitrary code as the root user on the build server.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
PyPItemplated-dictionary1.4.1GHSA-7j98-74jh-cjxh
PyPItemplated-dictionary1.4.1PYSEC-2026-1949

Affected products (as reported)

VendorProductVersions
n/a mock see references
Red Hat Red Hat Enterprise Linux 6 see references
Fedora Extra Packages for Enterprise Linux see references
Fedora Fedora see references

Weakness: CWE-20, CWE-94 · Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References