A vulnerability has been identified in vsftpd, which could be exploited by attackers or malicious users to cause a denial of service. This issue is caused due to the application not freeing allocated memory when processing user-supplied commands while the "deny_file" option is enabled via the "vsftpd.conf" configuration file, which could be exploited by authenticated or anonymous users to cause a vulnerable server to exhaust all available memory resources, creating a denial of service condition.
Note: A second issue related to the handling of a large number of invalid authentication attempts within the same session could also be exploited to cause a denial of service.
Credits
Vulnerability reported by Martin Nagy.
ChangeLog
2008-05-21 : Initial release
2008-05-22 : Updated Description
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