CVE-2021-26717
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 Sangoma Asterisk 16.x before 16.16.1, 17.x before 17.9.2, and 18.x before 18.2.1 and Certified Asterisk before 16.8-cert6. When re-negotiating for T.38, if the initial remote response was delayed just enough, Asterisk would send both audio and T.38 in the SDP. If this happened, and the remote responded with a declined T.38 stream, then Asterisk would crash.
Se detectó un problema en Sangoma Asterisk versiones 16.x 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. Al renegociar para T.38, si la respuesta remota inicial se retrasó lo suficiente, Asterisk enviaría tanto audio como T.38 en el SDP. Si esto sucediera, y el control remoto respondiera con una transmisión T.38 rechazada, entonces Asterisk podría bloquearse
*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
- 2021-02-18 CVE Published
- 2023-11-04 EPSS Updated
- 2024-08-03 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (5)
| URL | Tag | Source |
|---|---|---|
| http://packetstormsecurity.com/files/161471/Asterisk-Project-Security-Advisory-AST-2021-002.html | Third Party Advisory |
|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| http://seclists.org/fulldisclosure/2021/Feb/58 | 2021-02-24 | |
| https://issues.asterisk.org/jira/browse/ASTERISK-29203 | 2021-02-24 |
| URL | Date | SRC |
|---|---|---|
| https://downloads.asterisk.org/pub/security | 2021-02-24 | |
| https://downloads.asterisk.org/pub/security/AST-2021-002.html | 2021-02-24 |
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 < 18.2.1 Search vendor "Digium" for product "Asterisk" and version " >= 18.0 < 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
| ||||||