---------------------------------------------------------------------- Ovum says ad hoc tools are out-dated. The best practice approach? Fast vulnerability intelligence, threat handling, and setup in one tool. Read the new report on the Secunia VIM: http://secunia.com/products/corporate/vim/ovum_2011_request/ ---------------------------------------------------------------------- TITLE: Tor TLS Certificate Reuse User De-Anonymisation Security Issue SECUNIA ADVISORY ID: SA46634 VERIFY ADVISORY: Secunia.com http://secunia.com/advisories/46634/ Customer Area (Credentials Required) https://ca.secunia.com/?page=viewadvisory&vuln_id=46634 RELEASE DATE: 2011-10-28 DISCUSS ADVISORY: http://secunia.com/advisories/46634/#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/46634/ 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=46634 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: A security issue has been reported in Tor, which can be exploited by malicious people to disclose potentially sensitive information. The security issue is caused due to clients reusing the TLS certificate on certain connections. This can be exploited to e.g. fingerprint and de-anonymise a user by e.g. using the user's certificate identity key to probe various guard relays to determine whether or not the user is connected to them. Note: Additionally, enhancement have been made to protect against bridge enumeration attacks. The security issue is reported in versions prior to 0.2.2.34. SOLUTION: Update to version 0.2.2.34. PROVIDED AND/OR DISCOVERED BY: The vendor credits frosty_un. ORIGINAL ADVISORY: https://blog.torproject.org/blog/tor-02234-released-security-patches OTHER REFERENCES: Further details available in Customer Area: http://secunia.com/vulnerability_intelligence/ DEEP LINKS: Further details available in Customer Area: http://secunia.com/vulnerability_intelligence/ EXTENDED DESCRIPTION: Further details available in Customer Area: http://secunia.com/vulnerability_intelligence/ EXTENDED SOLUTION: Further details available in Customer Area: http://secunia.com/vulnerability_intelligence/ EXPLOIT: Further details available in Customer Area: http://secunia.com/vulnerability_intelligence/ ---------------------------------------------------------------------- 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. ---------------------------------------------------------------------- Unsubscribe: Secunia Security Advisories http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org ----------------------------------------------------------------------