CVE-2021-29258
envoyproxy/envoy: crash with empty HTTP/2 metadata map
Severity Score
7.5
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
An issue was discovered in Envoy 1.14.0. There is a remotely exploitable crash for HTTP2 Metadata, because an empty METADATA map triggers a Reachable Assertion.
Se detectó un problema en Envoy versión 1.14.0. Se presenta un bloqueo explotable remoto para unos metadatos HTTP2, porque un mapa de METADATOS vacío desencadena un Reachable Assertion
A flaw was found in envoyproxy. An attacker, able to craft an HTTP2 request that specifies an empty metadata map, can crash envoy resulting in a denial of service due to the null reference. The highest threat from this vulnerability is to system availability.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2021-03-26 CVE Reserved
- 2021-04-22 CVE Published
- 2024-02-03 EPSS Updated
- 2024-08-03 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-476: NULL Pointer Dereference
- CWE-617: Reachable Assertion
CAPEC
References (7)
| URL | Tag | Source |
|---|---|---|
| https://github.com/envoyproxy/envoy-setec/pull/230 | Broken Link | |
| https://github.com/envoyproxy/envoy/releases/tag/v1.14.0 | Third Party Advisory | |
| https://github.com/envoyproxy/envoy/security/advisories/GHSA-rqvq-hxw5-776j | Third Party Advisory | |
| https://github.com/envoyproxy/envoy/security/advisories/GHSA-xw4q-6pj2-5gfg | Not Applicable |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://blog.envoyproxy.io | 2021-05-27 | |
| https://access.redhat.com/security/cve/CVE-2021-29258 | 2021-04-22 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1942280 | 2021-04-22 |
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" | 1.14.6 Search vendor "Envoyproxy" for product "Envoy" and version "1.14.6" | - |
Affected
| ||||||
| Envoyproxy Search vendor "Envoyproxy" | Envoy Search vendor "Envoyproxy" for product "Envoy" | 1.15.3 Search vendor "Envoyproxy" for product "Envoy" and version "1.15.3" | - |
Affected
| ||||||
| Envoyproxy Search vendor "Envoyproxy" | Envoy Search vendor "Envoyproxy" for product "Envoy" | 1.16.2 Search vendor "Envoyproxy" for product "Envoy" and version "1.16.2" | - |
Affected
| ||||||
| Envoyproxy Search vendor "Envoyproxy" | Envoy Search vendor "Envoyproxy" for product "Envoy" | 1.17.1 Search vendor "Envoyproxy" for product "Envoy" and version "1.17.1" | - |
Affected
| ||||||