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OpenVPN LD_PRELOAD Environment Variable Pushing Vulnerability
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Secunia Advisory:
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SA19531
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Release Date:
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2006-04-06
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Critical:
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Less critical
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Impact:
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System access
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | OpenVPN 2.x
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| | CVE reference: | CVE-2006-1629 (Secunia mirror)
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Description:
Hendrik Weimer has reported a vulnerability in OpenVPN, which can be exploited by malicious people to compromise a user's system.
The vulnerability is caused due to OpenVPN clients allowing the server to transmit environment variables including LD_PRELOAD to client-side shell scripts via "setenv" configuration directives. This can be exploited to execute arbitrary code on a vulnerable client by placing a malicious file in a known location and load this.
Successful exploitation requires that a user connects to a malicious server.
The vulnerability has been reported in versions 2.0 through 2.0.5.
Solution:
Update to version 2.0.6.
Provided and/or discovered by:
Hendrik Weimer
Original Advisory:
OpenVPN:
http://openvpn.net/changelog.html
Hendrik Weimer:
http://www.osreviews.net/reviews/security/openvpn-print
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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4 Related Secunia Security Advisories
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1. OpenVPN Multiple Vulnerabilities
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2. OpenVPN OpenSSL RSA Signature Forgery
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3. OpenVPN Format String and Denial of Service Vulnerabilities
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4. OpenVPN Multiple DoS Vulnerabilities
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