DescriptionThe SIP over UDP implementation in Asterisk Open Source 1.4.x before 1.4.43, 1.6.x before, and 1.8.x before uses different port numbers for responses to invalid requests depending on whether a SIP username exists, which allows remote attackers to enumerate usernames via a series of requests.
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 (attack range: remote)
Debian Bugs651552

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
asterisk (PTS)jessie, jessie (security)1:11.13.1~dfsg-2+deb8u5fixed
stretch, stretch (security)1:13.14.1~dfsg-2+deb9u3fixed
buster, sid1:13.20.0~dfsg-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs

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