CVE-2019-1922 : Vulnerability Insights and Analysis
Learn about CVE-2019-1922 affecting Cisco IP Phone 7800 and 8800 Series. Discover the impact, affected systems, exploitation details, and mitigation steps to secure your network.
A security flaw in the Cisco SIP IP Phone Software for the Cisco IP Phone 7800 Series and 8800 Series could lead to a denial of service (DoS) situation on a targeted phone due to inadequate validation of input SIP packets.
Understanding CVE-2019-1922
This CVE involves a vulnerability in Cisco IP Phone software that could allow unauthorized manipulation of SIP responses, potentially causing affected phones to reboot during the registration process.
What is CVE-2019-1922?
The vulnerability arises from insufficient validation of SIP packets, enabling attackers to disrupt phone registration by sending manipulated responses without authentication.
The Impact of CVE-2019-1922
- Severity: Medium
- CVSS Base Score: 5.3
- Attack Vector: Network
- Attack Complexity: High
- Availability Impact: High
- Successful exploitation could result in a DoS scenario, causing affected phones to reboot and fail the registration process.
Technical Details of CVE-2019-1922
This section provides detailed technical insights into the vulnerability.
Vulnerability Description
The vulnerability allows attackers to disrupt the registration process of Cisco IP Phone 7800 and 8800 Series by manipulating SIP responses without authentication.
Affected Systems and Versions
- Affected Product: Cisco IP Phone 8800 Series Software
- Vendor: Cisco
- Vulnerable Versions: Less than 12.0(1)MN130
Exploitation Mechanism
- Attackers can exploit the vulnerability by altering SIP responses during the registration process, leading to phone reboots and registration failures.
Mitigation and Prevention
Protecting systems from CVE-2019-1922 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply vendor-recommended patches promptly.
- Monitor network traffic for any suspicious activity related to SIP packets.
- Implement network segmentation to isolate vulnerable devices.
Long-Term Security Practices
- Regularly update and patch all software and firmware on IP phones.
- Conduct security training for users to recognize and report suspicious activities.
Patching and Updates
- Cisco has released patches to address the vulnerability. Ensure all affected systems are updated with the latest software versions.