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Secunia Security Advisory 46634

Secunia Security Advisory 46634
Posted Oct 28, 2011
Authored by Secunia | Site secunia.com

Secunia Security Advisory - A security issue has been reported in Tor, which can be exploited by malicious people to disclose potentially sensitive information.

tags | advisory
SHA-256 | 8051c4c1c72f1ff96f763f5f6e030949cec80dd6c7c1264b322a9c7e9a6de2a9

Secunia Security Advisory 46634

Change Mirror Download
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http://secunia.com/products/corporate/vim/ovum_2011_request/

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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.

----------------------------------------------------------------------

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