CVE-2021-1311: Cisco Webex Meetings and Cisco Webex Meetings Server Host Key Brute Forcing Vulnerability
First published: Wed Jan 13 2021(Updated: )
A vulnerability in the reclaim host role feature of Cisco Webex Meetings and Cisco Webex Meetings Server could allow an authenticated, remote attacker to take over the host role during a meeting. This vulnerability is due to a lack of protection against brute forcing of the host key. An attacker could exploit this vulnerability by sending crafted requests to a vulnerable Cisco Webex Meetings or Webex Meetings Server site. A successful exploit would require the attacker to have access to join a Webex meeting, including applicable meeting join links and passwords. A successful exploit could allow the attacker to acquire or take over the host role for a meeting.
Credit: ykramarz@cisco.com ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Webex Meetings | <2020-12-15 | |
| Cisco WebEx Meetings Server | <3.0 | |
| Cisco WebEx Meetings Server | =3.0 | |
| Cisco WebEx Meetings Server | =3.0-maintenance_release1 | |
| Cisco WebEx Meetings Server | =3.0-maintenance_release2 | |
| Cisco WebEx Meetings Server | =3.0-maintenance_release3 | |
| Cisco WebEx Meetings Server | =3.0-maintenance_release4 | |
| Cisco WebEx Meetings Server | =4.0 | |
| Cisco WebEx Meetings Server | =4.0-maintenance_release1 | |
| Cisco WebEx Meetings Server | =4.0-maintenance_release2 | |
| Cisco WebEx Meetings Server | =4.0-maintenance_release3 | |
| Cisco Webex Meetings | <40.12.0 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is the vulnerability ID for this Cisco Webex Meetings vulnerability?
The vulnerability ID for this Cisco Webex Meetings vulnerability is CVE-2021-1311.
What is the severity rating of CVE-2021-1311?
The severity rating of CVE-2021-1311 is 5.4 (Medium).
What is affected by this vulnerability?
This vulnerability affects Cisco Webex Meetings and Cisco WebEx Meetings Server versions up to and including 2020-12-15 and 3.0, including maintenance releases 1, 2, 3, 4, and 4.0, including maintenance releases 1, 2, and 3.
How can an attacker exploit this vulnerability?
An attacker can exploit this vulnerability by brute-forcing the host key during a meeting to take over the host role.
Where can I find more information about CVE-2021-1311?
You can find more information about CVE-2021-1311 on the Cisco Security Advisory page: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-brutef-hostkey-FWRMxVF.
- collector/nvd-index
- agent/type
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/weakness
- agent/references
- agent/author
- agent/softwarecombine
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/title
- agent/severity
- agent/first-publish-date
- agent/tags
- agent/event
- vendor/cisco
- canonical/cisco webex meetings
- canonical/cisco webex meetings server
- version/cisco webex meetings server/3.0
- version/cisco webex meetings server/3.0-maintenance_release1
- version/cisco webex meetings server/3.0-maintenance_release2
- version/cisco webex meetings server/3.0-maintenance_release3
- version/cisco webex meetings server/3.0-maintenance_release4
- version/cisco webex meetings server/4.0
- version/cisco webex meetings server/4.0-maintenance_release1
- version/cisco webex meetings server/4.0-maintenance_release2
- version/cisco webex meetings server/4.0-maintenance_release3