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Secunia Advisory SA8330

OpenSSL RSA blinding attack
Secunia Advisory SA8330
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Release Date 2003-03-19
Last Update 2003-04-11
   
Popularity 12,854 views
Comments 0 comments

Criticality level Less criticalLess critical
Impact Exposure of sensitive information
Where From remote
Authentication level Available in Customer Area
   
Report reliability Available in Customer Area
Solution Status Vendor Patch
   
Systems affected Available in Customer Area
Approve distribution Available in Customer Area
   
Software:
OpenSSL 0.x

Secunia CVSS Score Available in Customer Area
CVE Reference(s) CVE-2003-0147 CVSS available in Customer Area
  

Description

OpenSSL has been found vulnerable to a timing attack, which has been proven to be a feasible way to recover the RSA secret from systems running OpenSSL.

The problem is that various queries takes different amounts of processing time, this information can be used to guess the private key.

The attacks has been proven feasible over LANs and high speed internet connections. It is required that the load on the server is low and that the network load is low so that an attacker can measure the time differences.

This attack only requires 300.000 to 1.400.000 queries to the ssl server.


Solution
Upgrade to version 0.9.7b:
Further details available in Customer Area

Provided and/or discovered by
D. Boneh and D. Brumley

Changelog
Further details available in Customer Area

Original Advisory
http://crypto.stanford.edu/~dabo/abstracts/ssl-timing.html

Deep Links
Links available in Customer Area


Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: OpenSSL RSA blinding attack
 
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