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TITLE:
Gadu-Gadu HTML Processing Code Execution Vulnerability

SECUNIA ADVISORY ID:
SA44667

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/44667/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=44667

RELEASE DATE:
2011-05-31

DISCUSS ADVISORY:
http://secunia.com/advisories/44667/#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/44667/

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=44667

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:
Kacper Szczesniak has discovered a vulnerability in Gadu-Gadu, which
can be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to an error when processing certain
HTML content and can be exploited to inject malicious content via a
Man-in-the-Middle (MitM) attack and execute an arbitrary program.

Successful exploitation allows execution of arbitrary code, but
requires intercepting the communication between the client and
certain web servers.

The vulnerability is confirmed in version 10.5. Other versions may
also be affected.

SOLUTION:
Filter malicious characters and character sequences in a proxy.

PROVIDED AND/OR DISCOVERED BY:
Kacper Szczesniak

ORIGINAL ADVISORY:
http://archives.neohapsis.com/archives/fulldisclosure/2011-05/0517.html

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.

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Definitions: (Criticality, Where etc.)
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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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