CVE-2021-43824
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| envoyproxy | envoy | >= 1.20.0, < 1.20.2 | affected |
| envoyproxy | envoy | >= 1.19.0, < 1.19.3 | affected |
| envoyproxy | envoy | < 1.18.6 | affected |
| envoyproxy | envoy | >= 1.21.0, < 1.21.1 | affected |
Weaknesses
- CWE-476: CWE-476: NULL Pointer Dereference
ADP Enrichment
CVE Program Container
Additional References
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-vj5m-rch8-5r2p
- https://github.com/envoyproxy/envoy/commit/9371333230b1a6e1be2eccf4868771e11af6253a
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
References
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-vj5m-rch8-5r2p
- https://github.com/envoyproxy/envoy/commit/9371333230b1a6e1be2eccf4868771e11af6253a
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