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CVE-2020-28242

Date: November 6, 2020

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.

Language: C++

Severity Score

Related Resources (8)

https://nvd.nist.gov/vuln/detail/CVE-2020-28242
https://security-tracker.debian.org/tracker/CVE-2020-28242
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QUS54QTQCYKR36EIULYD544GXDA644HB/
http://downloads.asterisk.org/pub/security/AST-2020-002.html
https://lists.debian.org/debian-lts-announce/2022/04/msg00001.html
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-28242
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QUS54QTQCYKR36EIULYD544GXDA644HB/
https://www.mend.io/vulnerability-database/CVE-2020-28242

Severity Score

Weakness Type (CWE)

Uncontrolled Recursion

CWE-674

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): SINGLE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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