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

Quick assessment

Affected
signalwire freeswitch
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FreeSWITCH是美国Anthony Minessale个人开发者的研发的一套免费、开源的通信软件。该软件可用于创建音、视频以及短消息类产品和应用。 FreeSWITCH 存在资源管理错误漏洞，该漏洞源于版本1.10.7之前的FreeSWITCH很容易通过SIP洪水拒绝服务。攻击者可利用该漏洞用SIP消息淹没任何freeeswitch实例，从而导致拒绝服务。

CVSS 8.6 · High EPSS 1.65% · P76

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-41145

Vulnerability Information
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Vulnerability Title
FreeSWITCH susceptible to Denial of Service via SIP flooding
Source: CVE Program / CVE List V5
Vulnerability 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. 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
FreeSWITCH 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FreeSWITCH是美国Anthony Minessale个人开发者的研发的一套免费、开源的通信软件。该软件可用于创建音、视频以及短消息类产品和应用。 FreeSWITCH 存在资源管理错误漏洞，该漏洞源于版本1.10.7之前的FreeSWITCH很容易通过SIP洪水拒绝服务。攻击者可利用该漏洞用SIP消息淹没任何freeeswitch实例，从而导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
signalwire freeswitch < 1.10.7 -

II. Public POCs for CVE-2021-41145

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III. Intelligence Information for CVE-2021-41145

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Vendor Advisories for CVE-2021-41145 (1)

Other References for CVE-2021-41145 (1)

Same Patch Batch · signalwire · 2021-10-25 · 3 CVEs total

CVE-2021-37624 7.5 HIGH FreeSWITCH does not authenticate SIP MESSAGE requests, leading to spam and message spoofin
CVE-2021-41105 7.5 HIGH FreeSWITCH susceptible to Denial of Service via invalid SRTP packets

IV. Related Vulnerabilities

Same product: freeswitch
Same vendor: signalwire
Same weakness: CWE-400

V. Comments for CVE-2021-41145

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