Vulnerability Name:

CVE-2020-3471 (CCN-191964)

Assigned:2019-12-12
Published:2020-11-18
Updated:2021-08-06
Summary:A vulnerability in Cisco Webex Meetings and Cisco Webex Meetings Server could allow an unauthenticated, remote attacker to maintain bidirectional audio despite being expelled from an active Webex session. The vulnerability is due to a synchronization issue between meeting and media services on a vulnerable Webex site. An attacker could exploit this vulnerability by sending crafted requests to a vulnerable Cisco Webex Meetings or Cisco Webex Meetings Server site. A successful exploit could allow the attacker to maintain the audio connection of a Webex session despite being expelled.
CVSS v3 Severity:6.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N)
5.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): None
6.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N)
5.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): None
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
6.8 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:C/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): None
Availibility (A): None
Vulnerability Type:CWE-662
Vulnerability Consequences:Obtain Information
References:Source: MITRE
Type: CNA
CVE-2020-3471

Source: XF
Type: UNKNOWN
cisco-cve20203471-info-disc(191964)

Source: CCN
Type: Security Intelligence Web site
IBM Works With Cisco to Exorcise Ghosts From Webex Meetings

Source: CCN
Type: Cisco Security Advisory cisco-sa-webex-info-leak-PhpzB3sG
Cisco Webex Meetings and Cisco Webex Meetings Server Unauthorized Audio Information Exposure Vulnerability

Source: CISCO
Type: Vendor Advisory
20201118 Cisco Webex Meetings and Cisco Webex Meetings Server Unauthorized Audio Information Exposure Vulnerability

Vulnerable Configuration:Configuration 1:
  • cpe:/a:cisco:webex_meetings_server:*:*:*:*:*:*:*:* (Version < 3.0)
  • OR cpe:/a:cisco:webex_meetings_server:3.0:maintenance_release2:*:*:*:*:*:*
  • OR cpe:/a:cisco:webex_meetings_server:3.0:maintenance_release3:*:*:*:*:*:*
  • OR cpe:/a:cisco:webex_meetings_server:4.0:-:*:*:*:*:*:*
  • OR cpe:/a:cisco:webex_meetings_server:4.0:maintenance_release1:*:*:*:*:*:*
  • OR cpe:/a:cisco:webex_meetings_server:4.0:maintenance_release2:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:cisco:webex_meetings:39.5.25:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    cisco webex meetings server *
    cisco webex meetings server 3.0 maintenance_release2
    cisco webex meetings server 3.0 maintenance_release3
    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 39.5.25