TITLE:
AppScan QA HTTP Response Handling Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA18013

VERIFY ADVISORY:
http://secunia.com/advisories/18013/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
AppScan 5.x QA
http://secunia.com/product/6530/

DESCRIPTION:
Mariano Nunez Di Croce has reported a vulnerability in AppScan QA,
which potentially can be exploited by malicious people to compromise
a user's system.

The vulnerability is caused due to a boundary error when handling 401
HTTP responses. This can be be exploited to cause a buffer overflow
via a specially crafted 401 response that contains a WWW-Authenticate
header with the "Realm" field consisting of more than 351 characters.

Successful exploitation requires that the user uses AppScan to scan a
malicious web server.

The vulnerability has been reported in version 5.0.134, and 5.0.609
Subscription 7

SOLUTION:
The vulnerability has reportedly been fixed in Subscription 8.

PROVIDED AND/OR DISCOVERED BY:
Mariano Nunez Di Croce, Cybsec S.A.

ORIGINAL ADVISORY:
http://www.cybsec.com/vuln/CYBSEC_Security_Advisory_AppScanQA_RemoteCodeExec.pdf

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