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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.

PUBLISHED Reserved 2025-04-22 | Published 2025-11-26 | Updated 2025-12-03 | Assigner mitre

References

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

packetstorm.news/files/id/189989

gist.github.com/R-Security/1c707a08f9c7f9a91d9d84b5010aaed2

github.com/fail2ban/fail2ban/issues/4110

cve.org (CVE-2025-45311)

nvd.nist.gov (CVE-2025-45311)

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