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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-41157 Detail

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. By default, SIP requests of the type SUBSCRIBE are not authenticated in the affected versions of FreeSWITCH. Abuse of this security issue allows attackers to subscribe to user agent event notifications without the need to authenticate. This abuse poses privacy concerns and might lead to social engineering or similar attacks. For example, attackers may be able to monitor the status of target SIP extensions. Although this issue was fixed in version v1.10.6, installations upgraded to the fixed version of FreeSWITCH from an older version, may still be vulnerable if the configuration is not updated accordingly. Software upgrades do not update the configuration by default. SIP SUBSCRIBE messages should be authenticated by default so that FreeSWITCH administrators do not need to explicitly set the `auth-subscriptions` parameter. When following such a recommendation, a new parameter can be introduced to explicitly disable authentication.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://seclists.org/fulldisclosure/2021/Oct/41 Mailing List  Third Party Advisory 
http://seclists.org/fulldisclosure/2021/Oct/41 Mailing List  Third Party Advisory 
https://github.com/signalwire/freeswitch/commit/b21dd4e7f3a6f1d5f7be3ea500a319a5bc11db9e Patch  Third Party Advisory 
https://github.com/signalwire/freeswitch/commit/b21dd4e7f3a6f1d5f7be3ea500a319a5bc11db9e Patch  Third Party Advisory 
https://github.com/signalwire/freeswitch/releases/tag/v1.10.6 Release Notes  Third Party Advisory 
https://github.com/signalwire/freeswitch/releases/tag/v1.10.6 Release Notes  Third Party Advisory 
https://github.com/signalwire/freeswitch/security/advisories/GHSA-g7xg-7c54-rmpj Exploit  Third Party Advisory 
https://github.com/signalwire/freeswitch/security/advisories/GHSA-g7xg-7c54-rmpj Exploit  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-306 Missing Authentication for Critical Function cwe source acceptance level NIST  
CWE-287 Improper Authentication GitHub, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

5 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-41157
NVD Published Date:
10/26/2021
NVD Last Modified:
11/21/2024
Source:
GitHub, Inc.