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Netsikker nu! 2008
 
BigAnt Messenger AntServer Module Directory Traversal and Buffer Overflow
Secunia Advisory: SA29831
Release Date: 2008-04-16
Last Update: 2008-07-31
Popularity: 2,547 views

Critical:
Highly critical
Impact: Exposure of system information
Exposure of sensitive information
System access
Where: From remote
Solution Status: Vendor Patch

Software:BigAnt Messenger 2.x

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CVE reference:CVE-2008-1914


Description:
Two vulnerabilities have been discovered in BigAnt Messenger, which can be exploited by malicious people to disclose certain information or compromise a vulnerable system.

1) A boundary error in the AntServer Module (AntServer.exe) can be exploited to cause a stack-based buffer overflow e.g. by sending a specially crafted, overly long HTTP GET request to default port 6080/TCP.

Successful exploitation allows execution of arbitrary code.

2) An input validation error in the AntServer Module can be exploited to e.g. download arbitrary files via directory traversal attacks.

The vulnerabilities are confirmed in version 2.2. Other versions may also be affected.

Solution:
Update to version 2.39 sp5.
http://www.bigantsoft.com/download.html

Provided and/or discovered by:
1) Matteo Memelli
2) Luigi Auriemma

Changelog:
2008-04-17: Added vulnerability #2.
2008-04-22: Added CVE reference.
2008-07-25: Updated "Solution" section.
2008-07-31: Updated "Solution" section.

Original Advisory:
Matteo Memelli:
http://milw0rm.com/exploits/5451

Luigi Auriemma:
http://aluigi.altervista.org/adv/biggayant-adv.txt


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