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>> vsftpd "deny_file" Option Memory Leak Denial of Service Vulnerability
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Title : vsftpd "deny_file" Option Memory Leak Denial of Service Vulnerability
VUPEN ID : VUPEN/ADV-2008-1600
CVE ID : CVE-2007-5962 - CVE-2008-2375
Rated as : Moderate Risk 
Remotely Exploitable : Yes
Locally Exploitable : Yes
Release Date : 2008-05-21
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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.
Affected Products
vsftpd versions 2.0.x
Solution
VUPEN Security is not aware of any vendor-supplied patch.
References
http://www.vupen.com/english/advisories/2008/1600
https://bugzilla.redhat.com/show_bug.cgi?id=397011
Credits
Vulnerability reported by Martin Nagy.
ChangeLog
2008-05-21 : Initial release
2008-05-22 : Updated Description
Vulnerability Management
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