PT-2025-48139 · Unknown · Fail2Ban-Client

Published 2025-11-26 · Updated 2025-12-01 · CVE-2025-45311

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions fail2ban-client version 0.11.2

Description Insecure permissions in fail2ban-client version 0.11.2 can allow attackers with limited sudo privileges to perform arbitrary operations as root.

Recommendations Update fail2ban-client to a newer version that addresses the permission issue.

Fix

Incorrect Privilege Assignment

Weakness Enumeration

CWE-266

Related Identifiers

CVE-2025-45311

Affected Products

Fail2Ban-Client

References · 12

• https://osv.dev/vulnerability/DEBIAN-CVE-2025-45311 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-45311 · Security Note
• https://osv.dev/vulnerability/CVE-2025-45311 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2025-45311 · Vendor Advisory
• https://github.com/fail2ban/fail2ban/issues/4110 · Note
• https://gist.github.com/R-Security/1c707a08f9c7f9a91d9d84b5010aaed2 · Note
• https://twitter.com/CVEnew/status/1993709263181509119 · Twitter Post
• https://t.me/cveNotify/144289 · Telegram Post
• https://twitter.com/cracbot/status/1995447851401523312 · Twitter Post
• https://twitter.com/ytroncal/status/1993788053249560582 · Twitter Post
• http://openwall.com/lists/oss-security/2025/12/03/2 · Note
• https://packetstorm.news/files/id/189989 · Note