CVE-2021-41145: FreeSWITCH susceptible to Denial of Service via SIP flooding
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 Software
Event History
Frequently Asked Questions
What is CVE-2021-41145?
CVE-2021-41145 is a vulnerability in FreeSWITCH, a Software Defined Telecom Stack, that allows for Denial of Service attacks through SIP flooding.
How severe is CVE-2021-41145?
CVE-2021-41145 has a severity rating of 7.5, which is considered high.
What software versions are affected by CVE-2021-41145?
FreeSWITCH versions up to and excluding 1.10.7 are affected by CVE-2021-41145.
How can I fix CVE-2021-41145?
To fix CVE-2021-41145, it is recommended to update FreeSWITCH to version 1.10.7 or later.
Where can I find more information about CVE-2021-41145?
You can find more information about CVE-2021-41145 on the GitHub release page [1] and the SignalWire advisory page [2].