Vulnerability in Envoyproxy Envoy
CVE-2022-21655
Envoy is an open source edge and service proxy, designed for cloud-native applications. The envoy common router will segfault if an internal redirect selects a route configured with direct response or redirect actions. This will result in a denial of service. As a workaround turn off internal redirects if direct response entries are configured on the same listener.
EPSS: 0.011 (63.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Envoyproxy Envoy — versions < 1.18.6, >= 1.19.0, < 1.19.3, >= 1.20.0, < 1.20.2
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-2022-21655?
- CVE-2022-21655 is a high-severity vulnerability in Envoyproxy Envoy, classified under Always-Incorrect Control Flow Implementation. CVSS score: 7.5/10. Published 2022-02-22.
- How severe is CVE-2022-21655?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2022-21655 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.