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TITLE:
Capi4Hylafax Shell Command Injection

SECUNIA ADVISORY ID:
SA21726

VERIFY ADVISORY:
http://secunia.com/advisories/21726/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
CAPI4Hylafax 1.x
http://secunia.com/product/11809/

DESCRIPTION:
A vulnerability has been reported in Capi4Hylafax, which potentially
can be exploited by malicious people to compromise a vulnerable
system.

The vulnerability is caused due to an error in c2faxrecv, which
doesn't properly sanitise TSI strings when handling incoming calls.
This can be exploited to execute shell commands with privileges of
the user running c2faxrecv.

SOLUTION:
Use another product.

PROVIDED AND/OR DISCOVERED BY:
Lionel Elie Mamane

ORIGINAL ADVISORY:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=382474

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