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CVE-2015-0205

5.0 · MEDIUM

The ssl3_get_cert_verify function in s3_srvr.c in OpenSSL 1.0.0 before 1.0.0p and 1.0.1 before 1.0.1k accepts client authentication with a Diffie-Hellman (DH) certificate without requiring a Certif…

Published Jan 9, 2015opensslCWE-310EPSS 22.34%

Overview

CVE-2015-0205 is a medium-severity vulnerability affecting openssl openssl. It was published on January 9, 2015 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

The ssl3_get_cert_verify function in s3_srvr.c in OpenSSL 1.0.0 before 1.0.0p and 1.0.1 before 1.0.1k accepts client authentication with a Diffie-Hellman (DH) certificate without requiring a CertificateVerify message, which allows remote attackers to obtain access without knowledge of a private key via crafted TLS Handshake Protocol traffic to a server that recognizes a Certification Authority with DH support.

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

References

Refkb.juniper.net/InfoCenter/index?page=content&id=JSA10679Reflists.fedoraproject.org/pipermail/package-announce/2015-January/147938.htmlReflists.fedoraproject.org/pipermail/package-announce/2015-January/148363.htmlReflists.opensuse.org/opensuse-security-announce/2015-01/msg00021.htmlReflists.opensuse.org/opensuse-security-announce/2015-03/msg00027.htmlReflists.opensuse.org/opensuse-security-announce/2015-05/msg00026.htmlReflists.opensuse.org/opensuse-security-announce/2015-07/msg00037.htmlRefmarc.info/?l=bugtraq&m=142721102728110&w=2Refmarc.info/?l=bugtraq&m=143748090628601&w=2Refmarc.info/?l=bugtraq&m=144050155601375&w=2

How CyberStrike helps

Frequently asked questions

What is CVE-2015-0205?

CVE-2015-0205 is a medium-severity vulnerability affecting openssl openssl. It was published on January 9, 2015 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

How severe is CVE-2015-0205?

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-2015-0205?

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-2015-0205?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2015-0205 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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