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

2021-10-2522:05:11

CWE-400

GitHub_M

www.cve.org

8.6 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

8.8 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

42.2%

JSON

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.

CNA Affected

[
  {
    "product": "freeswitch",
    "vendor": "signalwire",
    "versions": [
      {
        "status": "affected",
        "version": "< 1.10.7"
      }
    ]
  }
]