Local File Write Vulnerability in Fail2ban by Configurable Actions
CVE-2009-5023
Currently unrated
What is CVE-2009-5023?
Fail2ban versions prior to 0.8.5 can be exploited by local users through a symlink attack targeting predictable temporary files. Specifically, configurations such as dshield.conf, mail-buffered.conf, and mynetwatchman.conf within the action.d directory permit unauthorized writing to arbitrary files. This vulnerability arises from inadequate sanitation of file paths, enabling attackers to manipulate system behavior by crafting symbolic links that redirect file writing operations.
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