CVE-2019-1923 : Security Advisory and Response
Learn about CVE-2019-1923 affecting Cisco SPA525G2 5-line IP Phones. Discover the impact, affected versions, and mitigation steps to secure your devices.
A security flaw in Cisco Small Business SPA500 Series IP Phones allows attackers to execute unauthorized commands with elevated privileges.
Understanding CVE-2019-1923
What is CVE-2019-1923?
This CVE identifies a vulnerability in Cisco SPA525G2 5-line IP Phones that enables attackers in close proximity to execute unauthorized commands.
The Impact of CVE-2019-1923
The vulnerability allows attackers to execute arbitrary commands on the device with elevated privileges, potentially compromising confidentiality, integrity, and availability.
Technical Details of CVE-2019-1923
Vulnerability Description
The flaw arises from improper input validation in the device's configuration interface, enabling attackers to exploit the vulnerability by physically connecting a USB storage device to the phone.
Affected Systems and Versions
- Product: Cisco SPA525G2 5-line IP Phone
- Vendor: Cisco
- Versions Affected: Firmware releases less than 7.6.2SR5
Exploitation Mechanism
- Attack Complexity: Low
- Attack Vector: Physical
- Privileges Required: Low
- User Interaction: None
- Scope: Unchanged
- CVSS Score: 6.6 (Medium Severity)
Mitigation and Prevention
Immediate Steps to Take
- Update to firmware version 7.6.2SR5 or later
- Restrict physical access to the device
- Monitor and restrict USB device connections
Long-Term Security Practices
- Regularly update firmware and security patches
- Implement network segmentation to limit exposure
Patching and Updates
- Apply vendor-recommended patches promptly