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CVE-2016-0702

5.1 · MEDIUM

The MOD_EXP_CTIME_COPY_FROM_PREBUF function in crypto/bn/bn_exp.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g does not properly consider cache-bank access times during modular exponentia…

Published Mar 3, 2016CWE-200EPSS 1.91%

Overview

CVE-2016-0702 is a medium-severity vulnerability. It was published on March 3, 2016 and has a CVSS 3.1 base score of 5.1 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.1, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

The MOD_EXP_CTIME_COPY_FROM_PREBUF function in crypto/bn/bn_exp.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g does not properly consider cache-bank access times during modular exponentiation, which makes it easier for local users to discover RSA keys by running a crafted application on the same Intel Sandy Bridge CPU core as a victim and leveraging cache-bank conflicts, aka a "CacheBleed" attack.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. 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.

References

Refcachebleed.infoRefkb.juniper.net/InfoCenter/index?page=content&id=JSA10759Reflists.fedoraproject.org/pipermail/package-announce/2016-March/178358.htmlReflists.fedoraproject.org/pipermail/package-announce/2016-March/178817.htmlReflists.opensuse.org/opensuse-security-announce/2016-03/msg00001.htmlReflists.opensuse.org/opensuse-security-announce/2016-03/msg00002.htmlReflists.opensuse.org/opensuse-security-announce/2016-03/msg00003.htmlReflists.opensuse.org/opensuse-security-announce/2016-03/msg00004.htmlReflists.opensuse.org/opensuse-security-announce/2016-03/msg00005.htmlReflists.opensuse.org/opensuse-security-announce/2016-03/msg00006.html

How CyberStrike helps

Frequently asked questions

What is CVE-2016-0702?

CVE-2016-0702 is a medium-severity vulnerability. It was published on March 3, 2016 and has a CVSS 3.1 base score of 5.1 (MEDIUM).

How severe is CVE-2016-0702?

This vulnerability has a CVSS 3.1 base score of 5.1, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2016-0702?

Check the references section for vendor advisories, patches, and mitigation guidance. 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-2016-0702?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2016-0702 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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