CVE-2021-43824
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2021
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Null pointer dereference in envoy
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
envoy
- Vendor
- envoyproxy
- Product
- envoy
- Platforms
- Unknown
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| >= 1.20.0, < 1.20.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| >= 1.19.0, < 1.19.3 | affected | Unavailable | Unavailable | Unavailable | None listed |
| < 1.18.6 | affected | Unavailable | Unavailable | Unavailable | None listed |
| >= 1.21.0, < 1.21.1 | affected | Unavailable | Unavailable | Unavailable | None listed |