CVE-2021-31878

medium
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

An issue was discovered in PJSIP in Asterisk before 16.19.1 and before 18.5.1. To exploit, a re-INVITE without SDP must be received after Asterisk has sent a BYE request.

References

https://downloads.digium.com/pub/security/AST-2021-007.html

http://seclists.org/fulldisclosure/2021/Jul/48

http://downloads.asterisk.org/pub/security/AST-2021-007.html

http://packetstormsecurity.com/files/163638/Asterisk-Project-Security-Advisory-AST-2021-007.html

https://issues.asterisk.org/jira/browse/ASTERISK-29381

Details

Source: MITRE

Published: 2021-07-30

Updated: 2021-08-07

Type: CWE-617

Risk Information

CVSS v2

Base Score: 4

Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 8

Severity: MEDIUM

CVSS v3

Base Score: 6.5

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 2.8

Severity: MEDIUM

Tenable Plugins

View all (1 total)

IDNameProductFamilySeverity
152072FreeBSD : asterisk -- Remote Crash Vulnerability in PJSIP channel driver (ffa364e1-ebf5-11eb-aef1-0897988a1c07)NessusFreeBSD Local Security Checks
medium