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Q1 Factsheets released:

http://secunia.com/resources/factsheets/2011_vendor/


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TITLE:
FirstClass Client Link Input Sanitation and Insecure Library Loading
Vulnerabilities

SECUNIA ADVISORY ID:
SA44052

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/44052/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=44052

RELEASE DATE:
2011-04-14

DISCUSS ADVISORY:
http://secunia.com/advisories/44052/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/44052/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
 * Remediation Status
 * Secunia CVSS Score
 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=44052

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
Two vulnerabilities have been discovered in FirstClass Client, which
can be exploited by malicious people to compromise a user's system.

1) An input sanitation error when processing "FCP://" URL links can
be exploited to create an arbitrary file with attacker controlled
content via a specially crafted link e.g. sent in an email message.

Successful exploitation of this vulnerability allows execution of
arbitrary code, but requires a user to click on a malicious link.

2) The application bundles a vulnerable version of the Pthreads-win32
library, which loads libraries (e.g. quserex.dll) in an insecure
manner and can be exploited to load arbitrary libraries by tricking a
user into e.g. opening a FC (".fc") file located on a remote WebDAV or
SMB share.

The vulnerabilities are confirmed in version 11.005. Other versions
may also be affected.

SOLUTION:
Do not open links and files from untrusted users.

PROVIDED AND/OR DISCOVERED BY:
1) Kyle Ossinger
2) Mister Teatime

ORIGINAL ADVISORY:
http://www.k0ss.net/post/4379731102/firstclass-0day-release-part-1
http://www.k0ss.net/post/4394800170/firstclass-0day-release-part-2-some-fun-tricks

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

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

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

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