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Secunia Advisory SA37320

Citrix Secure Gateway TLS Session Renegotiation Plaintext Injection
Secunia Advisory SA37320
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Release Date 2009-11-11
   
Popularity 1,270 view
Comments 0 comments

Criticality level Less criticalLess critical
Impact Manipulation of data
Where From remote
Authentication level Available in Customer Area
   
Report reliability Available in Customer Area
Solution Status Unpatched
   
   
3rd party PoC/exploit Link available in Customer Area
Systems affected Available in Customer Area
Approve distribution Available in Customer Area
   
Software:
Citrix Secure Gateway 3.x
Secunia CVSS Score Available in Customer Area
CVE Reference(s) CVE-2009-3555 CVSS available in Customer Area
  

Description
A vulnerability has been reported in Citrix Secure Gateway, which can be exploited by malicious people to manipulate certain data.

The vulnerability is caused due to an error in the TLS protocol while handling session renegotiations. 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.

This is related to:
SA37291

The vulnerability is reported in Secure Gateway versions 3.0 and 3.1.

Solution
Do not rely on the integrity of incoming TLS data.

Provided and/or discovered by
Reported by the vendor in Citrix Secure Gateway.

Originally discovered independently by Marsh Ray of PhoneFactor and Martin Rex.

Original Advisory
Citrix:
http://support.citrix.com/article/CTX123359

Other references
Further details available in Customer Area

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: Citrix Secure Gateway TLS Session Renegotiation Plaintext Injection
 
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