PT-2013-69: Denial of Service in Serv-U File Server

Vulnerable software

Serv-U File Server
Version: 15.0.0.0 and earlier

Link:
http://www.serv-u.com/

Severity level

Severity level: Medium
Impact: Denial of Service
Access Vector: Remote

CVSS v2:
Base Score: 5.0
Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:P)

CVE: not assigned

Software description

Serv-U File Server is a Windows and Linux based multi-protocol FTP, HTTP and SFTP file server.

Vulnerability description

The specialists of the Positive Research center have detected a Denial of Service vulnerability in Serv-U File Server.

Handling HTTP request with a recursive variable causes the application to enter an infinite loop, resulting in Denial of Service.

Exploitation

How to fix

Update your sofware up to the latest version

Advisory status

03.10.2013 - Vulnerability details were sent to CERT
19.02.2014 - Vendor releases fixed version and details
31.07.2014 - Public disclosure

Credits

The vulnerability was detected by Sergey Bobrov, Positive Research Center (Positive Technologies Company)

References

http://en.securitylab.ru/lab/PT-2013-69

Reports on the vulnerabilities previously discovered by Positive Research:

http://www.ptsecurity.com/research/advisory/
http://en.securitylab.ru/lab/

Threatscape