---------------------------------------------------------------------- Want a new IT Security job? Vacant positions at Secunia: http://secunia.com/secunia_vacancies/ ---------------------------------------------------------------------- TITLE: OS/400 POP3 Server User Accounts Exposure Weakness SECUNIA ADVISORY ID: SA14964 VERIFY ADVISORY: http://secunia.com/advisories/14964/ CRITICAL: Not critical IMPACT: Exposure of system information WHERE: >From remote OPERATING SYSTEM: OS/400 4.x http://secunia.com/product/998/ 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 ORIGINAL ADVISORY: http://www.venera.com/downloads/Enumeration_of_AS400_users_via_pop3.pdf ---------------------------------------------------------------------- About: This Advisory was delivered by Secunia as a free service to help everybody keeping their systems up to date against the latest vulnerabilities. Subscribe: http://secunia.com/secunia_security_advisories/ Definitions: (Criticality, Where etc.) http://secunia.com/about_secunia_advisories/ Please Note: Secunia recommends that you verify all advisories you receive by clicking the link. Secunia NEVER sends attached files with advisories. Secunia does not advise people to install third party patches, only use those supplied by the vendor. ---------------------------------------------------------------------- Unsubscribe: Secunia Security Advisories http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org ----------------------------------------------------------------------