Incorrect handling of internal redirects results in crash in Envoy
CVE-2022-21655

7.5HIGH

Key Information:

Vendor

Envoyproxy

Status
Envoy
Vendor
CVE Published:
22 February 2022

What is 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.

Affected Version(s)

envoy < 1.18.6 < 1.18.6

envoy >= 1.19.0, < 1.19.3 < 1.19.0, 1.19.3

envoy >= 1.20.0, < 1.20.2 < 1.20.0, 1.20.2

References

https://github.com/envoyproxy/envoy/security/advisories/G...
x_refsource_CONFIRM
https://github.com/envoyproxy/envoy/commit/177d608155ba8b...
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.