Vulnerability Name:

CVE-2021-34716 (CCN-207779)

Assigned:2021-08-18
Published:2021-08-18
Updated:2021-08-25
Summary:A vulnerability in the web-based management interface of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow an authenticated, remote attacker to execute arbitrary code on the underlying operating system as the root user. This vulnerability is due to incorrect handling of certain crafted software images that are uploaded to the affected device. An attacker could exploit this vulnerability by authenticating to the system as an administrative user and then uploading specific crafted software images to the affected device. A successful exploit could allow the attacker to execute arbitrary code on the underlying operating system as the root user.
CVSS v3 Severity:7.2 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H)
6.3 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
6.7 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L)
5.8 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): Low
CVSS v2 Severity:9.0 High (CVSS v2 Vector: AV:N/AC:L/Au:S/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
8.7 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:C/I:C/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Partial
Vulnerability Type:CWE-755
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2021-34716

Source: XF
Type: UNKNOWN
cisco-cve202134716-file-upload(207779)

Source: CCN
Type: Cisco Security Advisory cisco-sa-ewrce-QPynNCjh
Cisco Expressway Series and TelePresence Video Communication Server Remote Code Execution Vulnerability

Source: CISCO
Type: Patch, Vendor Advisory
20210818 Cisco Expressway Series and TelePresence Video Communication Server Remote Code Execution Vulnerability

Vulnerable Configuration:Configuration 1:
  • cpe:/a:cisco:expressway:*:*:*:*:*:*:*:* (Version >= x8.6.0 and < x14.1)
  • OR cpe:/a:cisco:telepresence_video_communication_server:*:*:*:*:*:*:*:* (Version >= x8.6 and <= x14.0.3)

    • Configuration CCN 1:
  • cpe:/a:cisco:telepresence_video_communication_server:x8.6:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    cisco expressway *
    cisco telepresence video communication server *
    cisco telepresence video communication server x8.6