Vulnerability in Envoyproxy Envoy
CVE-2022-23606
Envoy is an open source edge and service proxy, designed for cloud-native applications. When a cluster is deleted via Cluster Discovery Service (CDS) all idle connections established to endpoints in that cluster are disconnected. A recursion was introduced in the procedure of disconnecting idle connections that can lead to stack exhaustion and abnormal process termination when a cluster has a large number of idle connections. This infinite recursion causes Envoy to crash. Users are advised to upgrade.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.010 (61.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 61.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
- Envoyproxy Envoy — versions 1.21.0, >= 1.20.0, < 1.20.2, >= 1.21.0, < 1.21.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/envoyproxy/envoy/security/advisories/GHSA-9vp2-4cp7-vvxf (Third Party Advisory, Issue Tracking)
- github.com/envoyproxy/envoy/commit/4b6dd3b53cd5c6d4d4df378a2fc62c1707522b31 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-23606?
- CVE-2022-23606 is a medium-severity vulnerability in Envoyproxy Envoy, classified under Uncontrolled Recursion. CVSS score: 4.4/10. Published 2022-02-22.
- How severe is CVE-2022-23606?
- Medium severity. CVSS v3 base score is 4.4 out of 10.
- Is CVE-2022-23606 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.