CVE-2021-26713
Severity Score
6.5
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
A stack-based buffer overflow in res_rtp_asterisk.c in Sangoma Asterisk before 16.16.1, 17.x before 17.9.2, and 18.x before 18.2.1 and Certified Asterisk before 16.8-cert6 allows an authenticated WebRTC client to cause an Asterisk crash by sending multiple hold/unhold requests in quick succession. This is caused by a signedness comparison mismatch.
Un desbordamiento del búfer en la región stack de la memoria en el archivo res_rtp_asterisk.c en Sangoma Asterisk versiones anteriores a 16.16.1, versiones 17.x anteriores a 17.9.2 y versiones 18.x anteriores a 18.2.1 y Certified Asterisk versiones anteriores a 16.8-cert6, permite a un cliente WebRTC autenticado causar un bloqueo de Asterisk mediante el envío de múltiples peticiones de hold/unhold en una sucesión rápida. Esto es causado por una discrepancia en la comparación de firmas
*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
- 2021-02-05 CVE Reserved
- 2021-02-19 CVE Published
- 2024-08-03 CVE Updated
- 2024-08-11 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-787: Out-of-bounds Write
CAPEC
References (3)
| URL | Tag | Source |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://downloads.asterisk.org/pub/security | 2021-02-26 | |
| https://downloads.asterisk.org/pub/security/AST-2021-004.html | 2021-02-26 | |
| https://issues.asterisk.org/jira/browse/ASTERISK-29205 | 2021-02-26 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Digium Search vendor "Digium" | Asterisk Search vendor "Digium" for product "Asterisk" | >= 16.0.0 < 16.16.1 Search vendor "Digium" for product "Asterisk" and version " >= 16.0.0 < 16.16.1" | - |
Affected
| ||||||
| Digium Search vendor "Digium" | Asterisk Search vendor "Digium" for product "Asterisk" | >= 17.0.0 < 17.9.2 Search vendor "Digium" for product "Asterisk" and version " >= 17.0.0 < 17.9.2" | - |
Affected
| ||||||
| Digium Search vendor "Digium" | Asterisk Search vendor "Digium" for product "Asterisk" | >= 18.0.0 < 18.2.1 Search vendor "Digium" for product "Asterisk" and version " >= 18.0.0 < 18.2.1" | - |
Affected
| ||||||
| Digium Search vendor "Digium" | Certified Asterisk Search vendor "Digium" for product "Certified Asterisk" | 16.8 Search vendor "Digium" for product "Certified Asterisk" and version "16.8" | - |
Affected
| ||||||
| Digium Search vendor "Digium" | Certified Asterisk Search vendor "Digium" for product "Certified Asterisk" | 16.8 Search vendor "Digium" for product "Certified Asterisk" and version "16.8" | cert1-rc1 |
Affected
| ||||||
| Digium Search vendor "Digium" | Certified Asterisk Search vendor "Digium" for product "Certified Asterisk" | 16.8 Search vendor "Digium" for product "Certified Asterisk" and version "16.8" | cert1-rc2 |
Affected
| ||||||
| Digium Search vendor "Digium" | Certified Asterisk Search vendor "Digium" for product "Certified Asterisk" | 16.8 Search vendor "Digium" for product "Certified Asterisk" and version "16.8" | cert1-rc3 |
Affected
| ||||||
| Digium Search vendor "Digium" | Certified Asterisk Search vendor "Digium" for product "Certified Asterisk" | 16.8 Search vendor "Digium" for product "Certified Asterisk" and version "16.8" | cert1-rc4 |
Affected
| ||||||
| Digium Search vendor "Digium" | Certified Asterisk Search vendor "Digium" for product "Certified Asterisk" | 16.8 Search vendor "Digium" for product "Certified Asterisk" and version "16.8" | cert2 |
Affected
| ||||||
| Digium Search vendor "Digium" | Certified Asterisk Search vendor "Digium" for product "Certified Asterisk" | 16.8 Search vendor "Digium" for product "Certified Asterisk" and version "16.8" | cert3 |
Affected
| ||||||
| Digium Search vendor "Digium" | Certified Asterisk Search vendor "Digium" for product "Certified Asterisk" | 16.8 Search vendor "Digium" for product "Certified Asterisk" and version "16.8" | cert4 |
Affected
| ||||||
| Digium Search vendor "Digium" | Certified Asterisk Search vendor "Digium" for product "Certified Asterisk" | 16.8 Search vendor "Digium" for product "Certified Asterisk" and version "16.8" | cert4-rc1 |
Affected
| ||||||
| Digium Search vendor "Digium" | Certified Asterisk Search vendor "Digium" for product "Certified Asterisk" | 16.8 Search vendor "Digium" for product "Certified Asterisk" and version "16.8" | cert4-rc2 |
Affected
| ||||||
| Digium Search vendor "Digium" | Certified Asterisk Search vendor "Digium" for product "Certified Asterisk" | 16.8 Search vendor "Digium" for product "Certified Asterisk" and version "16.8" | cert4-rc3 |
Affected
| ||||||
| Digium Search vendor "Digium" | Certified Asterisk Search vendor "Digium" for product "Certified Asterisk" | 16.8 Search vendor "Digium" for product "Certified Asterisk" and version "16.8" | cert4-rc4 |
Affected
| ||||||
| Digium Search vendor "Digium" | Certified Asterisk Search vendor "Digium" for product "Certified Asterisk" | 16.8 Search vendor "Digium" for product "Certified Asterisk" and version "16.8" | cert5 |
Affected
| ||||||