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TITLE:
NovaNET "DtbClsLogin()" Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA34024

VERIFY ADVISORY:
http://secunia.com/advisories/34024/

DESCRIPTION:
AbdulAziz Hariri has discovered a vulnerability in NovaNET, which can
be exploited by malicious people to cause a DoS (Denial of Service)
and compromise a vulnerable system.

The vulnerability is caused due to a boundary error within the
"DtbClsLogin()" function in nnwindtb.dll (Windows) or libnnlindtb.so
(Linux), which can be exploited to cause a stack-based buffer
overflow by sending specially crafted requests to the application.

Successful exploitation allows to crash the application on a Windows
system and reportedly allows to execute arbitrary code on a Linux
system.

The vulnerability is confirmed in NovaNET version 12 (build 44717,
Evaluation) for Windows. Other versions may also be affected.

SOLUTION:
Restrict network access to the application.

PROVIDED AND/OR DISCOVERED BY:
AbdulAziz Hariri of Insight Technologies.

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