CVE-2019-1845 : What You Need to Know
Learn about CVE-2019-1845 affecting Cisco Unified Communications Manager IM&P Service, Cisco TelePresence VCS, and Cisco Expressway Series. Discover impact, technical details, and mitigation steps.
A weakness has been identified in the authentication service of Cisco Unified Communications Manager IM and Presence (Unified CM IM&P) Service, Cisco TelePresence Video Communication Server (VCS), and Cisco Expressway Series, potentially leading to a denial of service (DoS) situation.
Understanding CVE-2019-1845
This CVE involves a vulnerability in the authentication service of Cisco Unified Communications Manager IM and Presence (Unified CM IM&P) Service, Cisco TelePresence Video Communication Server (VCS), and Cisco Expressway Series.
What is CVE-2019-1845?
The vulnerability allows a remote attacker to disrupt the service for users attempting to authenticate, resulting in a DoS situation. It stems from inadequate controls for certain memory operations.
The Impact of CVE-2019-1845
- Attack Complexity: Low
- Attack Vector: Network
- Availability Impact: High
- Base Score: 8.6 (High)
- Scope: Changed
- User Interaction: None
- Vector String: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Technical Details of CVE-2019-1845
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability allows an unauthenticated remote attacker to disrupt the authentication service, causing a DoS condition.
Affected Systems and Versions
- Product: Cisco TelePresence Video Communication Server (VCS)
- Vendor: Cisco
- Versions Affected: Less than 12.5(1) (unspecified)
Exploitation Mechanism
- An attacker can exploit the vulnerability by sending a malformed request for Extensible Messaging and Presence Protocol (XMPP) authentication to an affected system.
Mitigation and Prevention
Steps to address and prevent exploitation of CVE-2019-1845.
Immediate Steps to Take
- Apply vendor-provided patches or updates promptly.
- Monitor Cisco's security advisories for any relevant information.
Long-Term Security Practices
- Regularly update and patch all software and systems.
- Implement network security measures to detect and prevent unauthorized access.
Patching and Updates
- Ensure all affected systems are updated with the latest patches from Cisco.