QMail Commands() Function Remote Integer Overflow Vulnerability

Bugtraq ID:	13535
Class:	Design Error
CVE:
Remote:	Yes
Local:	No
Published:	May 06 2005 12:00AM
Updated:	May 06 2005 12:00AM
Credit:	Georgi Guninski <[email protected]> disclosed this vulnerability.
Vulnerable:	Dan Bernstein QMail 1.0 3 Dan Bernstein QMail 1.0 2
Not Vulnerable:

QMail Commands() Function Remote Integer Overflow Vulnerability

QMail is susceptible to a remote integer overflow vulnerability in the commands() function.

Specifically, the commands() function can be coerced into overflowing an integer value, resulting in overwriting an unintended location with a NULL byte. This may only be possible in environments where more than 4 gigabytes of virtual memory is available, such as 64 bit systems.

This vulnerability may be exploited to execute arbitrary machine code in the context of the affected application.

QMail Commands() Function Remote Integer Overflow Vulnerability

A proof of concept denial of service exploit for this issue is provided at:
http://www.guninski.com/where_do_you_want_billg_to_go_today_4.html

The integrity of this external Web site is not guaranteed by Symantec.

The 'qpopup2.pl' proof of concept exploit has been added to this web site. This exploit demonstrates remote code execution.

QMail Commands() Function Remote Integer Overflow Vulnerability

Solution:
Currently we 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] <mailto:[email protected]>.

QMail Commands() Function Remote Integer Overflow Vulnerability

References:

• 64 bit qmail fun (Georgi Guninski )
  
• Qmail Homepage (Dan Bernstein)