CVE-2023-6395 Mock: privilege escalation for users that can access mock configuration
Attackers with access to mock configuration can inject Jinja2 templates to execute arbitrary code as root on build servers.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-6395?
CVE-2023-6395 is a medium-severity code injection vulnerability in Fedoraproject Extra Packages for Enterprise Linux, published on 16 Jan 2024. It can only be exploited from the same machine or local network, with no action from the victim.
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.
Which versions are affected by CVE-2023-6395?
3 open source packages ship an affected version, including templated-dictionary and templated_dictionary. It affects 3 products.
| Package | Affected | Fixed in |
|---|---|---|
templated-dictionary PyPI | All versions | 1.4.1 |
templated-dictionary PyPI | All versions | 1.4.1 |
templated_dictionary PyPI | All versions | 1.4.1 |
Products include Fedoraproject Extra Packages for Enterprise Linux, Fedoraproject Fedora, Rpm-Software-Management Mock.
How do I fix CVE-2023-6395?
Upgrade templated-dictionary to 1.4.1 or later.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2023-6395 being exploited?
There is no known exploitation of CVE-2023-6395 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Extra Packages for Enterprise Linux
- CVE-2023-34152 Command injection in ImageMagick
- CVE-2022-4170 Code injection in rxvt-unicode
- CVE-2022-40315 Moodle Minor SQL injection risk in admin user browsing
- CVE-2022-45152 Moodle blind Server-Side Request Forgery (SSRF) vulnerability in LTI provider library
- CVE-2022-24882 Server side NTLM does not properly check parameters in FreeRDP
All Fedoraproject Extra Packages for Enterprise Linux vulnerabilities
Sources
Also known as AZL-43540, GHSA-7j98-74jh-cjxh, OESA-2026-3913, OESA-2026-3914, OESA-2026-4061, PYSEC-2026-1949 and 1 more.