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SecureW2 Insecure Pre-Master Secret Generation

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Release Date:  2005-09-26    Last Update:  2005-10-04    Views:  7,789

Secunia Advisory SA16909

Where:

From local network

Impact:

Exposure of sensitive information

Solution Status:

Vendor Patch

Software:

CVE Reference(s):

Description


Simon Josefsson has reported a security issue in SecureW2, which potentially can be exploited by malicious people to disclose certain sensitive information.

The security issue is caused due to the insecure generation of the TLS pre-master secret using the "rand()" function. This may allow the master secret to derived and could lead to the disclosure of subsequent encrypted data.

The security issue has been reported in version 3.0. Other versions may also be affected.


Solution:
Update to version 3.1.2, which uses the CryptGenRandom() API for random number generation.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Simon Josefsson

Original Advisory:
http://lists.grok.org.uk/pipermail/full-disclosure/2005-September/037352.html

Deep Links:
Links available to Secunia VIM customers

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: SecureW2 Insecure Pre-Master Secret Generation

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