"Cisco Patches Critical Vulnerability in Enterprise Collaboration Solutions"

Cisco recently announced patches for a critical vulnerability in its Expressway series and TelePresence Video Communication Server (VCS) enterprise collaboration and video communication solutions.  Tracked as CVE-2023-20105 (CVSS score of 9.6), the vulnerability allows an administrator with "read-only" rights to elevate their privileges to "read-write."  The company noted that the issue exists because password change requests are not handled properly, allowing an attacker authenticated as a "read-only" administrator to send a crafted request to change the password for any user account on the system, including that of a "read-write" administrator, and then impersonate them.  Cisco noted that its Expressway series and TelePresence VCS deployments that have granted CLI access to a "read-only" administrator are also vulnerable to CVE-2023-20192, a high-severity vulnerability that can lead to privilege escalation.  According to Cisco, CLI access is disabled by default for "read-only" users.  Cisco noted that this vulnerability is due to incorrect implementation of user role permissions.  An attacker could exploit this vulnerability by authenticating to the application as a "read-only" CLI administrator and issuing commands normally reserved for administrators with "read-write" capabilities.  Cisco stated that an attacker could exploit this flaw to execute commands they would not normally have access to, including modifying system configuration parameters.  Expressway series and TelePresence VCS version 14.2.1 contains patches for CVE-2023-20105, while version 14.3.0 addresses CVE-2023-20192.

SecurityWeek reports: "Cisco Patches Critical Vulnerability in Enterprise Collaboration Solutions"