CVE-2019-18836 — Infinite Loop in Envoy

CWE-835 — Infinite LoopCWE-400 — Uncontrolled Resource Consumption8 documents6 sources
Severity
7.5HIGHNVD
EPSS
0.2%
top 63.79%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Istio.io IstioIstioEnvoyproxy Envoy
Timeline
PublishedNov 11
Latest updateMay 24

Description

Envoy 1.12.0 allows a remote denial of service because of resource loops, as demonstrated by a single idle TCP connection being able to keep a worker thread in an infinite busy loop when continue_on_listener_filters_timeout is used."

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages3 packages

▶NVDenvoyproxy/envoy1.12.0
▶NVDistio/istio1.3 — 1.3.5+1
▶Goistio.io/istio1.3.0 — 1.3.5

🔴Vulnerability Details

3
GHSA
GHSA-4r53-8549-7m3r: Envoy before 1↗2022-05-24
▶
GHSA
Istio vulnerable to denial of service↗2022-05-24
▶
OSV
Istio vulnerable to denial of service↗2022-05-24
▶

📋Vendor Advisories

2
Red Hat
istio/envoy: infinite loop in Envoy, and subsequently Istio leads to a DoS↗2019-11-11
▶
Red Hat
envoy: excessive iteration due to listener filter timeout leads to DoS↗2019-11-11
▶

💬Community

1
Bugzilla
CVE-2019-18836 envoy: excessive iteration due to listener filter timeout leads to DoS↗2019-11-11
▶
CVE-2019-18836 — Infinite Loop in Envoyproxy Envoy | cvebase