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TITLE:
AusweisApp Certificate Verification Vulnerability

SECUNIA ADVISORY ID:
SA42163

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/42163/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=42163

RELEASE DATE:
2010-11-10

DISCUSS ADVISORY:
http://secunia.com/advisories/42163/#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/42163/

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=42163

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:
Jan Schejbal has discovered a vulnerability in AusweisApp, which can
be exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to the automatic update functionality
not properly checking the validity of the SSL certificate for the
update server. This can be exploited to spoof an update server (e.g.
via DNS poisoning or a Man-in-the-Middle attack) and store arbitrary
files in the AutoStart folder via a specially crafted update
package.

Successful exploitation allows execution of arbitrary code.

The vulnerability is confirmed in version 1.0.1. Other versions may
also be affected.

SOLUTION:
Do not use the update functionality.

PROVIDED AND/OR DISCOVERED BY:
Jan Schejbal

ORIGINAL ADVISORY:
http://janschejbal.wordpress.com/2010/11/09/ausweisapp-gehackt-malware-uber-autoupdate/

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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