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Cfengine RSA Authentication Vulnerabilities
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Secunia Advisory:
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SA12251
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Release Date:
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2004-08-10
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Last Update:
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2005-02-22
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Popularity:
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6,249 views
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Critical:
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Moderately critical
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Impact:
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DoS
System access
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Where:
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From local network
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Solution Status:
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Vendor Patch
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| Software: | Cfengine 2.x
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Instant alerts on relevant vulnerabilities 
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| CVE reference: | CVE-2004-1701
CVE-2004-1702
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Description:
Juan Pablo Martinez Kuhn has discovered two vulnerabilities in Cfengine, allowing malicious people to compromise the system or cause a DoS (Denial of Service).
The vulnerabilities are caused due to insufficient input validation and a boundary error in the cfservd daemon when processing authentication requests. The problems lies in the "AuthenticationDialogue()" function, which is responsible for performing RSA authentication and key agreement.
This can be exploited to cause a heap-based buffer overflow and thereby execute arbitrary code.
The vulnerabilities reportedly affect Cfengine 2.0.0 to 2.1.7p1.
Solution:
Update to version 2.1.8.
http://www.cfengine.org/mirrors.html
Provided and/or discovered by:
Juan Pablo Martinez Kuhn, Core Security Technologies.
Changelog:
2005-02-22: Added CVE references.
Original Advisory:
http://www.coresecurity.com/common/showdoc.php?idx=387&idxseccion=10
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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