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CVE-2016-7069

5.9 · MEDIUM

An issue has been found in dnsdist before 1.2.0 in the way EDNS0 OPT records are handled when parsing responses from a backend.

Published Sep 11, 2018CWE-20EPSS 4.58%

Overview

CVE-2016-7069 is a medium-severity vulnerability. It was published on September 11, 2018 and has a CVSS 3.0 base score of 5.9 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

An issue has been found in dnsdist before 1.2.0 in the way EDNS0 OPT records are handled when parsing responses from a backend. When dnsdist is configured to add EDNS Client Subnet to a query, the response may contain an EDNS0 OPT record that has to be removed before forwarding the response to the initial client. On a 32-bit system, the pointer arithmetic used when parsing the received response to remove that record might trigger an undefined behavior leading to a crash.

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

Refwww.securityfocus.com/bid/100509Refbugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7069Refdnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2017-01.htmlRefwww.securityfocus.com/bid/100509Refbugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7069Refdnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2017-01.html

How CyberStrike helps

Frequently asked questions

What is CVE-2016-7069?

CVE-2016-7069 is a medium-severity vulnerability. It was published on September 11, 2018 and has a CVSS 3.0 base score of 5.9 (MEDIUM).

How severe is CVE-2016-7069?

This vulnerability has a CVSS 3.0 base score of 5.9, 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-2016-7069?

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-2016-7069?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2016-7069 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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