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.
EPSS: 0.010 (59.8th percentile) — read the EPSS interpretation.
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.
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
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory, Issue Tracking)
- security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)
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.