IBM AIX FTP Ephemeral Port Exhaustion Denial Of Service Vulnerability

BID:14193

Info

IBM AIX FTP Ephemeral Port Exhaustion Denial Of Service Vulnerability

Bugtraq ID: 14193
Class: Design Error
CVE:
Remote: Yes
Local: No
Published: Jul 08 2005 12:00AM
Updated: Jul 08 2005 12:00AM
Credit: Discovery is credited to Matt Mello and IBM.
Vulnerable: IBM AIX 5.3
IBM AIX 5.2
IBM AIX 5.1
Not Vulnerable:

Discussion

IBM AIX FTP Ephemeral Port Exhaustion Denial Of Service Vulnerability

A remote denial of service vulnerability has been reported in the IBM AIX FTP server implementation. A remote authenticated FTP user may exhaust all available ephemeral network ports on the computer.

Exploitation of this vulnerability could result in a denial of service as no new connections can be initiated on ephemeral ports. In addition, system resources could be impacted if all of these ports are in use.

Exploit / POC

IBM AIX FTP Ephemeral Port Exhaustion Denial Of Service Vulnerability

Currently we are not aware of any exploits for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected] <mailto:[email protected]>.

Solution / Fix

IBM AIX FTP Ephemeral Port Exhaustion Denial Of Service Vulnerability

Solution:
IBM has released interim fixes to address vulnerability. APARs are pending release. Please refer to the IBM advisory for further details.

IBM has updated their advisory stating APARs are now available. Please see the referenced advisory for more information.


IBM AIX 5.1

IBM AIX 5.2

IBM AIX 5.3

References

IBM AIX FTP Ephemeral Port Exhaustion Denial Of Service Vulnerability

References:

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