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CVE-2009-0789

5.0 · MEDIUM

OpenSSL before 0.9.8k on WIN64 and certain other platforms does not properly handle a malformed ASN.1 structure, which allows remote attackers to cause a denial of service (invalid memory access an…

Published Mar 27, 2009opensslCWE-189EPSS 2.59%

Overview

CVE-2009-0789 is a medium-severity vulnerability affecting openssl openssl. It was published on March 27, 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

OpenSSL before 0.9.8k on WIN64 and certain other platforms does not properly handle a malformed ASN.1 structure, which allows remote attackers to cause a denial of service (invalid memory access and application crash) by placing this structure in the public key of a certificate, as demonstrated by an RSA public key.

Remediation

Check the references section for vendor advisories and patches from openssl. Update openssl 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
opensslopenssl0Affected

References

Refftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2009-008.txt.ascReflists.apple.com/archives/security-announce/2009/Sep/msg00004.htmlReflists.opensuse.org/opensuse-security-announce/2009-05/msg00000.htmlReflists.opensuse.org/opensuse-security-announce/2011-07/msg00013.htmlReflists.opensuse.org/opensuse-security-announce/2011-07/msg00014.htmlRefmarc.info/?l=bugtraq&m=124464882609472&w=2Refmarc.info/?l=bugtraq&m=127678688104458&w=2Refsecunia.com/advisories/34411Refsecunia.com/advisories/34460Refsecunia.com/advisories/34666

How CyberStrike helps

Frequently asked questions

What is CVE-2009-0789?

CVE-2009-0789 is a medium-severity vulnerability affecting openssl openssl. It was published on March 27, 2009 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

How severe is CVE-2009-0789?

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-2009-0789?

Check the references section for vendor advisories and patches from openssl. Update openssl 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-2009-0789?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2009-0789 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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