Opera SSL Certificate "Stealing" Weakness

2006.07.03
Risk: Medium
Local: No
Remote: Yes
CWE: CWE-Other


CVSS Base Score: 5/10
Impact Subscore: 2.9/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: None
Integrity impact: Partial
Availability impact: None

====================================================================== Secunia Research 28/06/2006 - Opera SSL Certificate "Stealing" Weakness - ====================================================================== Table of Contents Affected Software....................................................1 Severity.............................................................2 Description of Vulnerabilities.......................................3 Solution.............................................................4 Time Table...........................................................5 Credits..............................................................6 References...........................................................7 About Secunia........................................................8 Verification.........................................................9 ====================================================================== 1) Affected Software Opera 8.54 Prior versions may also be affected. ====================================================================== 2) Severity Rating: Not critical Impact: Spoofing Where: From remote ====================================================================== 3) Description of Vulnerabilities Secunia Research has discovered a weakness in Opera, which can be exploited to display the SSL certificate from a trusted site on an untrusted site. The weakness is caused due to Opera not resetting the SSL security bar after displaying a download dialog from a SSL enabled web site. This allows an untrusted web site to display yellow SSL security bar from a trusted web site. NOTE: A more convincing exploit can be done using pop-up windows, which do not have a visible address bar. ====================================================================== 4) Solution Upgrade to version 9.0. ====================================================================== 5) Time Table 31/03/2006 - Initial vendor notification. 28/06/2006 - Public disclosure. ====================================================================== 6) Credits Discovered by Jakob Balle, Secunia Research. ====================================================================== 7) References No references available. ====================================================================== 8) About Secunia Secunia collects, validates, assesses, and writes advisories regarding all the latest software vulnerabilities disclosed to the public. These advisories are gathered in a publicly available database at the Secunia website: http://secunia.com/ Secunia offers services to our customers enabling them to receive all relevant vulnerability information to their specific system configuration. Secunia offers a FREE mailing list called Secunia Security Advisories: http://secunia.com/secunia_security_advisories/ ====================================================================== 9) Verification Please verify this advisory by visiting the Secunia website: http://secunia.com/secunia_research/2006-49/advisory/ Complete list of vulnerability reports published by Secunia Research: http://secunia.com/secunia_research/ ======================================================================


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