CVE-2021-43824
Null pointer dereference in envoy
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
Envoy es un proxy de borde y servicio de código abierto, diseñado para aplicaciones nativas de la nube. En las versiones afectadas, una solicitud crafteada bloquea Envoy cuando se envía una solicitud CONNECT al filtro JWT configurado con coincidencia regex. Esto proporciona un vector de ataque de denegación de servicio. La única medida de mitigación es no utilizar regex en el filtro JWT. Se aconseja a los usuarios que actualicen
A flaw was found in envoy. A crafted request can potentially trigger a NULL pointer dereference when using a WT filter safe_regex match.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2021-11-16 CVE Reserved
- 2022-02-22 CVE Published
- 2024-08-04 CVE Updated
- 2024-11-07 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-476: NULL Pointer Dereference
CAPEC
References (4)
| URL | Tag | Source |
|---|---|---|
| https://github.com/envoyproxy/envoy/security/advisories/GHSA-vj5m-rch8-5r2p | Issue Tracking |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://github.com/envoyproxy/envoy/commit/9371333230b1a6e1be2eccf4868771e11af6253a | 2022-03-01 |
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2021-43824 | 2022-04-07 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2050744 | 2022-04-07 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Envoyproxy Search vendor "Envoyproxy" | Envoy Search vendor "Envoyproxy" for product "Envoy" | < 1.18.6 Search vendor "Envoyproxy" for product "Envoy" and version " < 1.18.6" | - |
Affected
| ||||||
| Envoyproxy Search vendor "Envoyproxy" | Envoy Search vendor "Envoyproxy" for product "Envoy" | >= 1.19.0 < 1.19.3 Search vendor "Envoyproxy" for product "Envoy" and version " >= 1.19.0 < 1.19.3" | - |
Affected
| ||||||
| Envoyproxy Search vendor "Envoyproxy" | Envoy Search vendor "Envoyproxy" for product "Envoy" | >= 1.20.0 < 1.20.2 Search vendor "Envoyproxy" for product "Envoy" and version " >= 1.20.0 < 1.20.2" | - |
Affected
| ||||||
| Envoyproxy Search vendor "Envoyproxy" | Envoy Search vendor "Envoyproxy" for product "Envoy" | >= 1.21.0 < 1.21.1 Search vendor "Envoyproxy" for product "Envoy" and version " >= 1.21.0 < 1.21.1" | - |
Affected
| ||||||