CVE-2020-28242

NameCVE-2020-28242
DescriptionAn 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium
Debian Bugs974713

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
asterisk (PTS)stretch (security), stretch1:13.14.1~dfsg-2+deb9u4vulnerable
buster1:16.2.1~dfsg-1+deb10u2vulnerable
bullseye, sid1:16.15.0~dfsg-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
asterisksource(unstable)1:16.15.0~dfsg-1974713

Notes

[buster] - asterisk <no-dsa> (Minor issue)
[stretch] - asterisk <no-dsa> (Minor issue)
https://issues.asterisk.org/jira/browse/ASTERISK-29013
http://downloads.asterisk.org/pub/security/AST-2020-002.html

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