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OpenSSL Two Vulnerabilities

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Release Date:  2009-11-06    Last Update:  2010-03-03    Views:  17,143

Secunia Advisory SA37291

Where:

From remote

Impact:

Unknown, Manipulation of data

Solution Status:

Vendor Patch

Software:

CVE Reference(s):

Description


Two vulnerabilities have been reported in OpenSSL, where one has unknown impacts and the other can be exploited by malicious people to manipulate certain data.

1) A vulnerability is caused due to an error in the TLS protocol while handling session re-negotiations. This can be exploited to insert arbitrary plaintext before data sent by a legitimate client in an existing TLS session via Man-in-the-Middle (MitM) attacks.

Successful exploitation may allow e.g. sending an arbitrary HTTP request under an authenticated context if certificate-based authentication is used by the server.

2) A vulnerability is caused due to the library not properly verifying the return value of the "bn_wexpand()" function.


Solution:
Update to version 0.9.8m.

Provided and/or discovered by:
1) Independently discovered by Marsh Ray, PhoneFactor and Martin Rex.
2) Martin Olsson and Neel Mehta

Original Advisory:
OpenSSL:
http://openssl.org/news/secadv_20091111.txt
http://archive.netbsd.se/?ml=openssl-announce&a=2010-02&m=12477250
http://rt.openssl.org/Ticket/Display.html?id=2111&user=guest&pass=guest

Martin Rex:
http://www.ietf.org/mail-archive/web/tls/current/msg03928.html

PhoneFactor:
http://extendedsubset.com/?p=8

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: OpenSSL Two Vulnerabilities

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