CVE Vulnerabilities

CVE-2023-20008

Improper Link Resolution Before File Access ('Link Following')

Published: Jan 20, 2023 | Modified: Nov 21, 2024
CVSS 3.x
7.1
HIGH
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
CVSS 2.x
RedHat/V2
RedHat/V3
Ubuntu

A vulnerability in the CLI of Cisco TelePresence CE and RoomOS Software could allow an authenticated, local attacker to overwrite arbitrary files on the local system of an affected device. This vulnerability is due to improper access controls on files that are in the local file system. An attacker could exploit this vulnerability by placing a symbolic link in a specific location on the local file system of an affected device. A successful exploit could allow the attacker to overwrite arbitrary files on the affected device.

Weakness

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

Affected Software

Name Vendor Start Version End Version
Roomos Cisco 10.3.2.0 (including) 10.3.2.0 (including)
Roomos Cisco 10.3.4.0 (including) 10.3.4.0 (including)
Roomos Cisco 10.8.2.5 (including) 10.8.2.5 (including)
Roomos Cisco 10.8.4.0 (including) 10.8.4.0 (including)
Roomos Cisco 10.11.3.0 (including) 10.11.3.0 (including)
Roomos Cisco 10.11.5.2 (including) 10.11.5.2 (including)
Roomos Cisco 10.15.3.0 (including) 10.15.3.0 (including)

Potential Mitigations

  • Follow the principle of least privilege when assigning access rights to entities in a software system.
  • Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.

References