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CVE-2019-9516

6.5 · MEDIUM

Some HTTP/2 implementations are vulnerable to a header leak, potentially leading to a denial of service.

Published Aug 13, 2019CWE-400EPSS 56.26%

Overview

CVE-2019-9516 is a medium-severity vulnerability. It was published on August 13, 2019 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Some HTTP/2 implementations are vulnerable to a header leak, potentially leading to a denial of service. The attacker sends a stream of headers with a 0-length header name and 0-length header value, optionally Huffman encoded into 1-byte or greater headers. Some implementations allocate memory for these headers and keep the allocation alive until the session dies. This can consume excess memory.

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

Reflists.opensuse.org/opensuse-security-announce/2019-09/msg00031.htmlReflists.opensuse.org/opensuse-security-announce/2019-09/msg00032.htmlReflists.opensuse.org/opensuse-security-announce/2019-09/msg00035.htmlReflists.opensuse.org/opensuse-security-announce/2019-10/msg00014.htmlRefseclists.org/fulldisclosure/2019/Aug/16Refaccess.redhat.com/errata/RHSA-2019:2745Refaccess.redhat.com/errata/RHSA-2019:2746Refaccess.redhat.com/errata/RHSA-2019:2775Refaccess.redhat.com/errata/RHSA-2019:2799Refaccess.redhat.com/errata/RHSA-2019:2925

How CyberStrike helps

Frequently asked questions

What is CVE-2019-9516?

CVE-2019-9516 is a medium-severity vulnerability. It was published on August 13, 2019 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2019-9516?

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2019-9516?

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-2019-9516?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-9516 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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