QMail Alloc() Remote Integer Overflow Vulnerability

Bugtraq ID:	13528
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 Alloc() Remote Integer Overflow Vulnerability

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

Specifically, the alloc() function can be coerced into overflowing an integer value, resulting in an incorrect memory allocation occurring. This may only be possible in environments where more than 4 gigabytes of virtual memory is available, such as 64 bit systems.

It is conjectured that remote code executing may be possible.

QMail Alloc() 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.

QMail Alloc() 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 Alloc() Remote Integer Overflow Vulnerability

References:

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