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Pardus: Ntp: Security Bypass Print E-mail
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Posted by Benjamin D. Thomas   
NTP does not properly check the return value from the OpenSSL EVP_VerifyFinal function, which allows remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature for DSA and ECDSA keys.

------------------------------------------------------------------------
Pardus Linux Security Advisory 2009-06            security@pardus.org.tr
------------------------------------------------------------------------
      Date: 2009-01-14
  Severity: 3
      Type: Remote
------------------------------------------------------------------------

Summary
=======

NTP  does not  properly  check  the  return  value  from  the  OpenSSL  
EVP_VerifyFinal  function, which  allows  remote  attackers  to  bypass 
validation of the certificate chain via a malformed  SSL/TLS  signature 
for DSA and ECDSA keys. 


Description
===========

This is a similar vulnerability to CVE-2008-5077. 


Affected packages:

  Pardus 2008:
    ntp-server, all before 4.2.4_p6-9-3
    ntp-client, all before 4.2.4_p6-9-3



Resolution
==========

There are update(s) for ntp-server, ntp-client. You can update them via 
Package Manager or with a single command from console: 

    pisi up ntp-server ntp-client

References
==========

  * http://bugs.pardus.org.tr/show_bug.cgi?id=8995
  * http://www.ocert.org/advisories/ocert-2008-016.html
 
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