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NTP OpenSSL "EVP_VerifyFinal()" Spoofing Vulnerability

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Release Date:  2009-01-08    Last Update:  2009-01-30    Views:  6,355

Secunia Advisory SA33406

Where:

From remote

Impact:

Spoofing

Solution Status:

Vendor Patch

Software:

CVE Reference(s):

Description


A vulnerability has been reported in NTP, which can be exploited by malicious people to conduct spoofing attacks.

The vulnerability is caused due to the application incorrectly verifying the return value of the "EVP_VerifyFinal()" OpenSSL function when validating key signatures and can be exploited to potentially spoof server responses.

This is related to:
SA33338

The vulnerability is reported in version 4.2.4p5. Prior versions may also be affected.


Solution:
Update to version 4.2.4p6.

Provided and/or discovered by:
Originally reported in OpenSSL by the Google Security Team.

Reported in NTP by oCERT.

Original Advisory:
oCERT:
http://www.ocert.org/advisories/ocert-2008-016.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: NTP OpenSSL "EVP_VerifyFinal()" Spoofing Vulnerability

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