Some HTTP/2 implementations are vulnerable to resource loops, potentially leading to a denial of service
43Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 82%
exploitation probability
82%top 1% of all CVEs
observed exploitation
nono source reports it
What the vendors declare (VEX)
Official vendor statements in CSAF/VEX format: whether their product is affected, already fixed, or ruled out — and why. These are the vendor's assertions, not Vexday's judgment.
Red HatVEX document ↗
Affected
2 products
Red Hat 3scale API Management Platform 2 · Red Hat OpenShift Application Runtimes
workaround: Red Hat Quay 3.0 uses Nginx 1.12 from Red Hat Software Collections. It will be updated once a fixed is released for Software Collections. In the meantime users of Quay can disable http/2 support in Nginx by following these instructions: 1…
Fixed
18 products (1,213 components)
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) · Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) · Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) · Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) · Red Hat JBoss Core Services on RHEL 6 Server · and others 13
Not affected
19 products (98 components) — because the vulnerable code is not present in the product
Red Hat OpenShift Container Platform 3.9 · Red Hat OpenShift Container Platform 3.10 · Red Hat OpenShift Container Platform 3.11 · CloudForms Management Engine 5 · Red Hat Enterprise Linux 8 · and others 14
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.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
n/a · n/aReferences
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00031.htmlhttp://lists.opensuse.org/opensuse-security-announce/2019-09/msg00032.htmlhttp://lists.opensuse.org/opensuse-security-announce/2019-09/msg00035.htmlhttp://lists.opensuse.org/opensuse-security-announce/2019-10/msg00003.htmlhttp://lists.opensuse.org/opensuse-security-announce/2019-10/msg00005.htmlhttp://lists.opensuse.org/opensuse-security-announce/2019-10/msg00014.htmlhttps://access.redhat.com/errata/RHSA-2019:2692https://access.redhat.com/errata/RHSA-2019:2745https://access.redhat.com/errata/RHSA-2019:2746https://access.redhat.com/errata/RHSA-2019:2775https://access.redhat.com/errata/RHSA-2019:2799https://access.redhat.com/errata/RHSA-2019:2925