Some vulnerabilities have been reported in Cisco IOS, which can be exploited by malicious users and malicious people to bypass certain security restrictions, cause a DoS (Denial of Service), or potentially compromise a vulnerable system.

1) An unspecified error exists in the IOS FTP server when verifying user credentials, which can be exploited to bypass user authentication.

2) An unspecified error exists when transferring files via FTP, which can be exploited to cause a DoS (Denial of Service) and potentially allow execution of arbitrary code.

Successful exploitation may allow an attacker to retrieve any file from an affected system (including startup-config), cause IOS to reload, and potentially execute arbitrary code, but requires that the FTP server is enabled, which is not the default setting.

The vulnerabilities are reported in IOS version 11.3, 12.0, 12.1, 12.2, 12.3, and 12.4 containing the FTP server feature.

Solution
Update to a fixed version (please see the patch matrix in the Cisco security advisory).

Provided and/or discovered by
Reported by the vendor.

Changelog
Further details available to Secunia VIM customers

Original Advisory
http://www.cisco.com/warp/public/707/cisco-sa-20070509-iosftp.shtml
http://www.cisco.com/warp/public/707/cisco-amb-20070509-iosftp.shtml

Alternate/detailed remediation
Further details available in Customer Area

Deep Links
Links available to Secunia VIM customers