CVE-2021-43824
High
Description
Envoy is an open source edge and service proxy, designed for cloud-native applications. In affected versions a crafted request crashes Envoy when a CONNECT request is sent to JWT filter configured with regex match. This provides a denial of service attack vector. The only workaround is to not use regex in the JWT filter. Users are advised to upgrade.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Envoy
PublishedFeb 22, 2022
First seenFeb 22, 2022
Weakness typeCWE-476NULL pointer dereference
How to fix
Update
- envoyproxy envoy1.18.6, 1.19.3, 1.20.2, 1.21.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| envoyproxy envoy | v < 1.18.6, 1.19.0 ≤ v < 1.19.3, 1.20.0 ≤ v < 1.20.2, 1.21.0 ≤ v < 1.21.1 | 1.18.6, 1.19.3, 1.20.2, 1.21.1 |
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