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TITLE:
F-Prot Antivirus Multiple Denial of Service Vulnerabilities

SECUNIA ADVISORY ID:
SA31118

VERIFY ADVISORY:
http://secunia.com/advisories/31118/

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
F-Prot Antivirus for Windows 6.x
http://secunia.com/product/16936/

DESCRIPTION:
Some vulnerabilities have been reported in F-Prot Antivirus, which
can be exploited by malicious people to cause a DoS (Denial of
Service).

1) An input validation error when processing the nb_dir field field
of a CHM file's header can be exploited to cause an invalid memory
access.

2) An unspecified error can be exploited to crash the engine via a
specially crafted UPX-compressed file.

3) An unspecified error can be exploited to cause the engine to enter
an infinite loop via a specially crafted Microsoft Office file.

4) An unspecified error can be exploited to cause a crash in the
64-bit engine when scanning ASPack-compressed files.

SOLUTION:
Update to the latest product/engine versions.
http://www.f-prot.com/download/

PROVIDED AND/OR DISCOVERED BY:
1) Sergio Alvarez of n.runs AG

ORIGINAL ADVISORY:
FRISK:
http://www.f-prot.com/download/ReleaseNotesWindows.txt

n.runs:
http://www.nruns.com/security_advisory_fprot_out-of-bound_memory_access_DoS.php

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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