CVE-2019-9513

Description

Some HTTP/2 implementations are vulnerable to resource loops, potentially leading to a denial of service. The attacker creates multiple request streams and continually shuffles the priority of the streams in a way that causes substantial churn to the priority tree. This can consume excess CPU.

How to fix CVE-2019-9513

To remediate CVE-2019-9513, upgrade the affected package to a fixed version below.

• Alpine/nghttp2—upgrade to 1.39.2-r0 or later
• —upgrade to 1.16.1-r0 or later
• —upgrade to 10.16.3-r0 or later
• —upgrade to 1.39.2-1 or later
• —upgrade to 1.14.2-3 or later
• —upgrade to 10.16.3~dfsg-1 or later

Is CVE-2019-9513 being exploited?

Moderate — EPSS is 6.6%. Track this CVE but it's not at the top of the prioritisation list.

Affected packages (6)

• from 0, < 1.39.2-r0
• from 0, < 1.16.1-r0
• from 0, < 10.16.3-r0
• from 0, < 1.39.2-1
• from 0, < 1.14.2-3
• from 0, < 10.16.3~dfsg-1

CVSS scores

References (2)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2019-9513
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2019-9513