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TITLE:
Active Webcam Denial of Service and Local File Detection

SECUNIA ADVISORY ID:
SA14553

VERIFY ADVISORY:
http://secunia.com/advisories/14553/

CRITICAL:
Moderately critical

IMPACT:
Exposure of system information, DoS

WHERE:
>From remote

SOFTWARE:
Active Webcam 5.x
http://secunia.com/product/4771/

DESCRIPTION:
Sowhat has reported two vulnerabilities and a weakness in Active
Webcam, which can be exploited by malicious people to cause a DoS
(Denial of Service) and detect the presence of local files.

1) An input validation error can be exploited to cause a vulnerable
server to become unaccessible by requesting a specially crafted
file.

Example:
http://[victim]:8080/A:\a.txt

The vulnerability has been confirmed in version 5.5. Other versions
may also be affected.

2) Different error messages are returned to users depending on
whether a given file exists or not. This can be exploited to detect
the presence of local files.

Example:
http://[victim]:8080/c:\test.txt

It is also possible to disclose the full installation path by
requesting a non-existing file.

The weakness has been confirmed in version 5.5. Other versions may
also be affected.

3) An error in the HTTP communication handling can be exploited to
crash a vulnerable service by sending a large amount of HTTP requests
(more than 1000).

The vulnerability has been reported in version 5.5. Other versions
may also be affected.

SOLUTION:
Filter traffic to the HTTP server or use another product.

PROVIDED AND/OR DISCOVERED BY:
Sowhat

ORIGINAL ADVISORY:
http://secway.org/advisory/ad20050104.txt

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