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Secunia Advisory SA14964

OS/400 POP3 Server User Accounts Exposure Weakness
Secunia Advisory SA14964
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Release Date 2005-04-15
Last Update 2005-04-18
   
Popularity 8,694 views
Comments 0 comments

Criticality level Not criticalNot critical
Impact Exposure of system information
Where From remote
Authentication level Available in Customer Area
   
Report reliability Available in Customer Area
Solution Status Unpatched
   
Systems affected Available in Customer Area
Approve distribution Available in Customer Area
Remediation status Secunia VIM
   
Operating System
IBM OS/400 4.x
Secunia CVSS Score Available in Customer Area
CVE Reference(s) CVE-2005-1133 CVSS available in Customer Area
  

Description

Shalom Carmel has reported a weakness in OS/400, which can be exploited by malicious people to identify valid user accounts.

The problem is that different error codes are returned depending on whether an unsuccessful login attempt to the POP3 server is performed with a valid or invalid username.

The weakness has been reported in version 4.5. Other versions may also be affected.


Solution
Restrict access to the POP3 service.

Provided and/or discovered by
Shalom Carmel

Changelog
Further details available in Customer Area

Original Advisory
http://www.venera.com/downloads/Enumeration_of_AS400_users_via_pop3.pdf

Deep Links
Links available in Customer Area


Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: OS/400 POP3 Server User Accounts Exposure Weakness
 
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