An issue was discovered in Envoy 1.12.0. An untrusted remote client may send HTTP/2 requests that write to the heap outside of the request buffers when the upstream is HTTP/1. This may be used to corrupt nearby heap contents (leading to a query-of-death scenario) or may be used to bypass Envoy's access control mechanisms such as path based routing. An attacker can also modify requests from other users that happen to be proximal temporally and spatially.

An update of the envoy package has been released.

The remote Redhat Enterprise Linux 7 / 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2019:4222 advisory.

    Red Hat OpenShift Service Mesh is Red Hat's distribution of the Istio service mesh project, tailored for     installation into an on-premise OpenShift Container Platform installation.

    This advisory covers the RPM packages for the OpenShift Service Mesh 1.0.3 release.

    Security Fix(es):

    * An untrusted remote client may send HTTP/2 requests that write to the heap outside of the request     buffers when the upstream is HTTP/1 (CVE-2019-18801)

    * Malformed request header may cause bypass of route matchers resulting in escalation of privileges or     information disclosure (CVE-2019-18802)

    * Malformed HTTP request without the Host header may cause abnormal termination of the Envoy process     (CVE-2019-18838)

    For more details about the security issue(s), including the impact, a CVSS     score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References     section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
133470	Photon OS 1.0: Envoy PHSA-2020-1.0-0268	Nessus	PhotonOS Local Security Checks	critical
133263	Photon OS 2.0: Envoy PHSA-2020-2.0-0202	Nessus	PhotonOS Local Security Checks	critical
132031	RHEL 7 / 8 : Red Hat OpenShift Service Mesh 1.0.3 RPMs (RHSA-2019:4222)	Nessus	Red Hat Local Security Checks	critical

Detections

Analytics

CVE-2019-18801

critical

Tenable Plugins

critical

critical

critical