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TITLE:
SmoothGuardian HTTP "Host:" Header Security Bypass

SECUNIA ADVISORY ID:
SA34014

VERIFY ADVISORY:
http://secunia.com/advisories/34014/

DESCRIPTION:
A security issue has been reported in SmoothGuardian, which can be
exploited by malicious people to bypass certain security
restrictions.

The security issue is caused due to the application relying on HTTP
"Host:" headers when acting as transparent proxy. This can be
exploited to e.g. access restricted websites or bypass a browser's
security context protection mechanism by sending HTTP requests with a
forged HTTP "Host:" header.

Successful exploitation requires that the attacker can forge the HTTP
"Host:" header (e.g. via active content).

SOLUTION:
As a workaround, the vendor recommends to "configure Guardian to
block their internal web servers without passwords using hostname and
IPaddress".

PROVIDED AND/OR DISCOVERED BY:
US-CERT credits Robert Auger, PayPal Information Risk Management
team.

ORIGINAL ADVISORY:
US-CERT VU#435052:
http://www.kb.cert.org/vuls/id/435052

http://www.kb.cert.org/vuls/id/MAPG-7M6SM7

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