Detections
Analytics
Cisco Expressway Series / Cisco TelePresence VCS DoS (cisco-sa-http2-reset-d8Kf32vZ)
high Nessus Plugin ID 186212
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Synopsis
The remote device is missing a vendor-supplied security patch.Description
The Cisco Expressway Series or Cisco TelePresence Video Communication Server (VCS) running on the remote host is prior to 14.3.3. It is, therefore, affected by a denial of service (DoS) vulnerability, due to a HTTP/2 protocol-level weakness. The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, which could allow an unauthenticated, remote attacker to exploit this issue to cause Cisco Expressway or Cisco VCS to stop responding.Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Upgrade to the relevant fixed version referenced in Cisco bug ID CSCwh88665See Also
Plugin Details
Severity: High
ID: 186212
File Name: cisco-sa-http2-reset-d8Kf32vZ_VCS.nasl
Version: 1.2
Type: remote
Family: CISCO
Published: 11/23/2023
Updated: 2/9/2024
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.1
CVSS v2
Risk Factor: High
Base Score: 7.8
Temporal Score: 6.4
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2023-44487
CVSS v3
Risk Factor: High
Base Score: 7.5
Temporal Score: 7
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C
Vulnerability Information
CPE: cpe:/h:cisco:telepresence_video_communication_server, cpe:/a:cisco:telepresence_video_communication_server_software
Required KB Items: Cisco/TelePresence_VCS/Version
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 12/1/2023
Vulnerability Publication Date: 10/16/2023
CISA Known Exploited Vulnerability Due Dates: 10/31/2023
Reference Information
CVE: CVE-2023-44487