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 CSCwh88665

Plugin Details

Severity: High

ID: 186212

File Name: cisco-sa-http2-reset-d8Kf32vZ_VCS.nasl

Version: 1.3

Type: remote

Family: CISCO

Published: 11/23/2023

Updated: 5/10/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

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:/a:cisco:telepresence_video_communication_server_software, cpe:/h:cisco:telepresence_video_communication_server

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

CISCO-SA: cisco-sa-http2-reset-d8Kf32vZ

CISCO-BUG-ID: CSCwh88665

Detections

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