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CVE-2009-0129

5.0 · MEDIUM

libcrypt-openssl-dsa-perl does not properly check the return value from the OpenSSL DSA_verify and DSA_do_verify functions, which might allow remote attackers to bypass validation of the certificat…

Published Jan 15, 2009perl-opensslCWE-287EPSS 1.12%

Overview

CVE-2009-0129 is a medium-severity vulnerability affecting perl-openssl libcrypt-openssl-dsa-perl. It was published on January 15, 2009 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

libcrypt-openssl-dsa-perl does not properly check the return value from the OpenSSL DSA_verify and DSA_do_verify functions, which might allow remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature, a similar vulnerability to CVE-2008-5077.

Remediation

Check the references section for vendor advisories and patches from perl-openssl. Update libcrypt-openssl-dsa-perl to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Refbugs.debian.org/cgi-bin/bugreport.cgi?bug=511519Refopenwall.com/lists/oss-security/2009/01/12/4Refbugs.debian.org/cgi-bin/bugreport.cgi?bug=511519Refopenwall.com/lists/oss-security/2009/01/12/4

How CyberStrike helps

Frequently asked questions

What is CVE-2009-0129?

CVE-2009-0129 is a medium-severity vulnerability affecting perl-openssl libcrypt-openssl-dsa-perl. It was published on January 15, 2009 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

How severe is CVE-2009-0129?

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2009-0129?

Check the references section for vendor advisories and patches from perl-openssl. Update libcrypt-openssl-dsa-perl to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2009-0129?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2009-0129 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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