FreeSWITCH susceptible to Denial of Service via SIP flooding
CVE-2021-41145

8.6HIGH

Key Information:

Vendor

Signalwire

Status
Freeswitch
Vendor
CVE Published:
25 October 2021

What is CVE-2021-41145?

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. FreeSWITCH prior to version 1.10.7 is susceptible to Denial of Service via SIP flooding. When flooding FreeSWITCH with SIP messages, it was observed that after a number of seconds the process was killed by the operating system due to memory exhaustion. By abusing this vulnerability, an attacker is able to crash any FreeSWITCH instance by flooding it with SIP messages, leading to Denial of Service. The attack does not require authentication and can be carried out over UDP, TCP or TLS. This issue was patched in version 1.10.7.

Affected Version(s)

freeswitch < 1.10.7

References

https://github.com/signalwire/freeswitch/releases/tag/v1....
x_refsource_MISC
https://github.com/signalwire/freeswitch/security/advisor...
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CVSS V3.1

Score:
8.6
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.