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🛡️ CVE-2023-6395 — extra-packages-for-enterprise-linux

🟡 CVSS 6.7 — Medium ⚠️ Exploit Public CWE-20 NVD
6.7
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Privilege escalation for users that can access mock configuration

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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs administrative privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Local — a local account, shell or session on the host is needed.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: High — administrative rights are needed first.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: High — total loss, or loss the attacker controls.
  • Availability impact: High — total loss, or loss the attacker controls.

Weakness class

CVE-2023-6395 is classified as CWE-20: Improper Input Validation. The application accepts input without checking that it has the expected form, so malformed values reach code that assumes they are well formed.

Affected software

CVE-2023-6395 is recorded against 4 packages.

  • extra-packages-for-enterprise-linux
  • fedora
  • mock
  • templated-dictionary (fixed in 1.4.1)

Timeline and source

Published on 16 January 2024 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. A vendor advisory or fix has been published. Record sourced from NVD.

References

www.openwall.com
www.openwall.com
access.redhat.com
bugzilla.redhat.com
github.com
github.com
lists.fedoraproject.org
lists.fedoraproject.org
www.openwall.com
www.openwall.com
access.redhat.com
bugzilla.redhat.com
github.com
github.com
lists.fedoraproject.org
lists.fedoraproject.org

Other advisories for this package

extra-packages-for-enterprise-linux has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-20: Improper Input Validation) in other software:

CVE-2023-6395 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity MEDIUM
CVSS Score 6.7
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CWE CWE-20
Public Exploit ⚠️ Yes
Source NVD
Published 2024-01-16
Updated 2026-08-20
Modified 2026-06-17

Affected Packages

Software From version Fixed in
extra-packages-for-enterprise-linux — —
fedora — —
mock — —
templated-dictionary — 1.4.1

References

Mailing List, Patch, Third Party Advisory http://www.openwall.com/lists/oss-security/2024/01/16/1
Exploit, Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2024/01/16/3
Issue Tracking, Third Party Advisory https://bugzilla.redhat.com/show_bug.cgi?id=2252206
Mailing List, Patch, Third Party Advisory http://www.openwall.com/lists/oss-security/2024/01/16/1
Exploit, Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2024/01/16/3
Issue Tracking, Third Party Advisory https://bugzilla.redhat.com/show_bug.cgi?id=2252206

Similar Threats

Exploit Protection

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CVE-2023-6395 carries CVSS 6.7 Medium rating and a public exploit already exists. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

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