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Medium severity6.5NVD Advisory· Published Nov 6, 2020· Updated Jun 17, 2026

CVE-2020-28242

CVE-2020-28242

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

7
  • Asterisk/Certified Asterisk2 versions
    cpe:2.3:a:asterisk:certified_asterisk:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:asterisk:certified_asterisk:*:*:*:*:*:*:*:*range: <=16.8.0
    • (no CPE)range: <16.8-cert5
  • Freepbx/Asterisk
    cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*
    Range: >=13.0,<13.37.1
  • Debian/linux
    cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
  • Fedoraproject/Fedora
    cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
  • Asterisk/Asterisk Open Sourcedescription
  • Asterisk/Asterisk Open Sourcellm-fuzzy
    Range: <13.37.1, <16.14.1, <17.8.1, <18.0.1

Patches

Vulnerability mechanics

References

3

News mentions

0

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