Executive Summary

Informations
Name CVE-2021-26717 First vendor Publication 2021-02-18
Vendor Cve Last vendor Modification 2021-02-24

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Overall CVSS Score 7.5
Base Score 7.5 Environmental Score 7.5
impact SubScore 3.6 Temporal Score 7.5
Exploitabality Sub Score 3.9
 
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact None
Integrity Impact None Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:N/I:N/A:P)
Cvss Base Score 5 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26717

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 932
Application 13

Sources (Detail)

Source Url
CONFIRM https://downloads.asterisk.org/pub/security/AST-2021-002.html
https://issues.asterisk.org/jira/browse/ASTERISK-29203
FULLDISC http://seclists.org/fulldisclosure/2021/Feb/58
MISC http://packetstormsecurity.com/files/161471/Asterisk-Project-Security-Advisor...
https://downloads.asterisk.org/pub/security/

Alert History

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Date Informations
2021-08-07 12:41:51
  • Multiple Updates
2021-05-04 14:07:13
  • Multiple Updates
2021-04-22 03:12:24
  • Multiple Updates
2021-03-26 12:38:22
  • Multiple Updates
2021-02-19 21:23:32
  • Multiple Updates
2021-02-19 05:23:02
  • Multiple Updates
2021-02-19 00:23:03
  • First insertion