CVE-2025-45311

Summary

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.

Affected Software

Weaknesses

• n/a

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: total

CVE Program Container

Additional References

• http://www.openwall.com/lists/oss-security/2025/12/03/2

References

• https://packetstorm.news/files/id/189989
• https://gist.github.com/R-Security/1c707a08f9c7f9a91d9d84b5010aaed2
• https://github.com/fail2ban/fail2ban/issues/4110

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