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VULNERABILITIES

CVE-2020-28242 Details

Description

An issue was discovered in Asterisk Open Source 13.x before 13.37.1, 16.x before 16.14.1, 17.x before 17.8.1, and 18.x before 18.0.1 and Certified Asterisk before 16.8-cert5. If Asterisk is challenged on an outbound INVITE and the nonce is changed in each response, Asterisk will continually send INVITEs in a loop. This causes Asterisk to consume more and more memory since the transaction will never terminate (even if the call is hung up), ultimately leading to a restart or shutdown of Asterisk. Outbound authentication must be configured on the endpoint for this to occur.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
http://downloads.asterisk.org/pub/security/AST-2020-002.html CVEVendor Advisory
https://lists.debian.org/debian-lts-announce/2022/04/msg00001.html CVEMailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QUS54QTQCYKR36EIULYD544GXDA644HB/ CVE
http://downloads.asterisk.org/pub/security/AST-2020-002.html [email protected]Vendor Advisory
https://lists.debian.org/debian-lts-announce/2022/04/msg00001.html [email protected]Mailing ListThird Party Advisory

see all 6 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-674Uncontrolled Recursion[email protected]

Affected Products

ProductVersions
asterisk certified asterisk
<= 16.8.0

CPE

  • cpe:2.3:a:asterisk:certified_asterisk:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
sangoma asterisk
>= 13.0, < 13.37.1
>= 16.0, < 16.14.1
>= 17.0, < 17.8.1
>= 18.0, < 18.0.1

CPE

  • cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
fedoraproject fedora
33

CPE

  • cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
debian debian linux
9.0

CPE

  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

13 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2020-28242
NVD Published Date:
Nov 6, 2020
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2020-28242 Details - Not Deferred