CVE-2021-28682
envoyproxy/envoy: integer overflow handling large grpc-timeouts
Severity Score
7.5
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
1
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
An issue was discovered in Envoy through 1.71.1. There is a remotely exploitable integer overflow in which a very large grpc-timeout value leads to unexpected timeout calculations.
Se detectó un problema en Envoy versiones hasta 1.71.1. presenta un desbordamiento de enteros explotable remoto en el que un valor de grpc-timeout muy grande conlleva a cálculos de tiempo de espera inesperados
A flaw was found in envoyproxy/envoy. An attacker, able to craft a packet which specifies a large grpc-timeout, can potentially cause envoy to incorrectly calculate the timeouts resulting in a denial of service. 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
- 2021-03-18 CVE Reserved
- 2021-04-22 CVE Published
- 2024-02-03 EPSS Updated
- 2024-08-03 CVE Updated
- 2024-08-03 First Exploit
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-190: Integer Overflow or Wraparound
CAPEC
References (6)
| URL | Tag | Source |
|---|---|---|
| https://github.com/envoyproxy/envoy/releases | Third Party Advisory | |
| https://github.com/envoyproxy/envoy/security/advisories/GHSA-r22g-5f3x-xjgg | Third Party Advisory |
| URL | Date | SRC |
|---|---|---|
| https://github.com/envoyproxy/envoy/blob/15e3b9dbcc9aaa9d391fa8033904aad1ea1ae70d/api/envoy/api/v2/cluster.proto#L36 | 2024-08-03 |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://blog.envoyproxy.io | 2021-05-27 | |
| https://access.redhat.com/security/cve/CVE-2021-28682 | 2021-04-22 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1942272 | 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
| ||||||