CVE-2025-45311

Dec. 3, 2025, 4:15 p.m.

8.8
High

Description

Insecure permissions in fail2ban-client v0.11.2 allows attackers with limited sudo privileges to perform arbitrary operations as root. NOTE: this is disputed by multiple parties because the action for a triggered rule can legitimately be an arbitrary operation as root. Thus, the software is behaving in accordance with its intended privilege model.

Product(s) Impacted

Product Versions
fail2ban-client
  • 0.11.2

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-266
Incorrect Privilege Assignment
A product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor.

References

https://gist.github.com/R-Security/1c707a08f9c7f9a91d9d84b5010aaed2
https://github.com/fail2ban/fail2ban/issues/4110
https://packetstorm.news/files/id/189989
http://www.openwall.com/lists/oss-security/2025/12/03/2

Tags

cve@mitre.org
CWE-266
2025-11-26
CVE-2025-45311

CVSS Score

8.8 / 10

CVSS Data - 3.1

  • Attack Vector: NETWORK
  • Attack Complexity: LOW
  • Privileges Required: LOW
  • Scope: UNCHANGED
  • Confidentiality Impact: HIGH
  • Integrity Impact: HIGH
  • Availability Impact: HIGH

    • CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

    View Vector String

Timeline

Published: Nov. 26, 2025, 4:15 p.m.
Last Modified: Dec. 3, 2025, 4:15 p.m.

Status : Awaiting Analysis

CVE has been marked for Analysis. Normally once in this state the CVE will be analyzed by NVD staff within 24 hours.

More info

Source

cve@mitre.org

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.