Vulnerability Details CVE-2020-28242
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 60.4%
CVSS Severity
CVSS v3 Score 6.5
CVSS v2 Score 4.0
References
- http://downloads.asterisk.org/pub/security/AST-2020-002.html
- https://lists.debian.org/debian-lts-announce/2022/04/msg00001.html
- 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://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QUS54QTQCYKR36EIULYD544GXDA644HB/
Products affected by CVE-2020-28242
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cpe:2.3:a:asterisk:certified_asterisk:13.13.0
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cpe:2.3:a:asterisk:certified_asterisk:16.8.0
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cpe:2.3:a:sangoma:asterisk:13.0.0
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cpe:2.3:a:sangoma:asterisk:13.1.0
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cpe:2.3:a:sangoma:asterisk:13.10.0
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cpe:2.3:a:sangoma:asterisk:13.11.0
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cpe:2.3:a:sangoma:asterisk:13.12.0
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cpe:2.3:a:sangoma:asterisk:13.12.1
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cpe:2.3:a:sangoma:asterisk:13.12.2
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cpe:2.3:a:sangoma:asterisk:13.13.0
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cpe:2.3:a:sangoma:asterisk:13.14.0
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cpe:2.3:a:sangoma:asterisk:13.15.0
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cpe:2.3:a:sangoma:asterisk:13.2.0
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cpe:2.3:a:sangoma:asterisk:13.3.0
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cpe:2.3:a:sangoma:asterisk:13.4.0
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cpe:2.3:a:sangoma:asterisk:13.5.0
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cpe:2.3:a:sangoma:asterisk:13.6.0
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cpe:2.3:a:sangoma:asterisk:13.7.0
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cpe:2.3:a:sangoma:asterisk:13.8.0
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cpe:2.3:a:sangoma:asterisk:13.8.1
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cpe:2.3:a:sangoma:asterisk:13.8.2
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cpe:2.3:a:sangoma:asterisk:13.9.0
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cpe:2.3:a:sangoma:asterisk:16.0.0
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cpe:2.3:a:sangoma:asterisk:16.10.0
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cpe:2.3:a:sangoma:asterisk:16.11.0
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cpe:2.3:a:sangoma:asterisk:16.12.0
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cpe:2.3:a:sangoma:asterisk:16.14.0
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cpe:2.3:a:sangoma:asterisk:16.5.0
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cpe:2.3:a:sangoma:asterisk:16.6.0
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cpe:2.3:a:sangoma:asterisk:16.7.0
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cpe:2.3:a:sangoma:asterisk:16.8.0
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cpe:2.3:a:sangoma:asterisk:16.9.0
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cpe:2.3:a:sangoma:asterisk:17.0.0
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cpe:2.3:a:sangoma:asterisk:17.1.0
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cpe:2.3:a:sangoma:asterisk:17.2.0
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cpe:2.3:a:sangoma:asterisk:17.3.0
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cpe:2.3:a:sangoma:asterisk:17.4.0
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cpe:2.3:a:sangoma:asterisk:17.5.0
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cpe:2.3:a:sangoma:asterisk:17.6.0
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cpe:2.3:a:sangoma:asterisk:17.7.0
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cpe:2.3:a:sangoma:asterisk:17.8.0
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cpe:2.3:a:sangoma:asterisk:18.0.0
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cpe:2.3:o:debian:debian_linux:9.0
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cpe:2.3:o:fedoraproject:fedora:33