Executive Summary

Informations
Name CVE-2019-18976 First vendor Publication 2019-11-22
Vendor Cve Last vendor Modification 2019-12-10

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 res_pjsip_t38.c in Sangoma Asterisk through 13.x and Certified Asterisk through 13.21-x. If it receives a re-invite initiating T.38 faxing and has a port of 0 and no c line in the SDP, a NULL pointer dereference and crash will occur. This is different from CVE-2019-18940.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-18976

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-476 NULL Pointer Dereference

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 912
Application 5

Sources (Detail)

Source Url
CONFIRM http://downloads.asterisk.org/pub/security/AST-2019-008.html
MISC https://packetstormsecurity.com/files/155436/Asterisk-Project-Security-Adviso...
https://seclists.org/fulldisclosure/2019/Nov/20
https://www.asterisk.org/downloads/security-advisories
https://www.cybersecurity-help.cz/vdb/SB2019112218?affChecked=1

Alert History

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0
Date Informations
2020-05-23 02:27:28
  • First insertion