CVE-2021-37624

Name
CVE-2021-37624
Description
FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. Prior to version 1.10.7, FreeSWITCH does not authenticate SIP MESSAGE requests, leading to spam and message spoofing. By default, SIP requests of the type MESSAGE (RFC 3428) are not authenticated in the affected versions of FreeSWITCH. MESSAGE requests are relayed to SIP user agents registered with the FreeSWITCH server without requiring any authentication. Although this behaviour can be changed by setting the `auth-messages` parameter to `true`, it is not the default setting. Abuse of this security issue allows attackers to send SIP MESSAGE messages to any SIP user agent that is registered with the server without requiring authentication. Additionally, since no authentication is required, chat messages can be spoofed to appear to come from trusted entities. Therefore, abuse can lead to spam and enable social engineering, phishing and similar attacks. This issue is patched in version 1.10.7. Maintainers recommend that this SIP message type is authenticated by default so that FreeSWITCH administrators do not need to be explicitly set the `auth-messages` parameter. When following such a recommendation, a new parameter can be introduced to explicitly disable authentication.
NVD Severity
medium
Other trackers
Mailing lists
Exploits
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
CONFIRM https://github.com/signalwire/freeswitch/security/advisories/GHSA-mjcm-q9h8-9xv3
MISC https://github.com/signalwire/freeswitch/releases/tag/v1.10.7
MLIST http://www.openwall.com/lists/oss-security/2021/10/25/6
FULLDISC http://seclists.org/fulldisclosure/2021/Oct/44
MISC http://packetstormsecurity.com/files/164628/FreeSWITCH-1.10.6-Missing-SIP-MESSAGE-Authentication.html

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:freeswitch:freeswitch:*:*:*:*:*:*:*:* freeswitch >= None < 1.10.7

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
freeswitch 3.14-main 1.10.6-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
freeswitch 3.13-main 1.10.5-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
freeswitch 3.12-main 1.10.3-r2 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
freeswitch 3.11-main 1.8.7-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
freeswitch edge-main 1.10.7-r0 Natanael Copa <ncopa@alpinelinux.org> fixed