[SA19845] wodSSHServer Key Exchange Algorithm String Buffer Overflow

TITLE:
wodSSHServer Key Exchange Algorithm String Buffer Overflow

SECUNIA ADVISORY ID:
SA19845

VERIFY ADVISORY:
http://secunia.com/advisories/19845/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
wodSSHServer ActiveX Component 1.x
http://secunia.com/product/9609/

DESCRIPTION:
Gerry Eisenhaur has discovered a vulnerability in WeOnlyDo
wodSSHServer, which can be exploited by malicious people to cause a
DoS (Denial of Service) and potentially compromise a vulnerable
system.

The vulnerability is caused due to a boundary error within the
handling of the key exchange algorithm string sent by an SSH client.
This can be exploited to cause a stack-based buffer overflow and may
allow arbitrary code execution.

The vulnerability has been confirmed in versions 1.2.7 and 1.3.3
DEMO. Other versions may also be affected.

SOLUTION:
Restrict access to trusted IP addresses only.

PROVIDED AND/OR DISCOVERED BY:
Gerry Eisenhaur

About:
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everybody keeping their systems up to date against the latest
vulnerabilities.

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