CVE-2018-0325 : What You Need to Know
Learn about CVE-2018-0325, a flaw in Cisco IP Phone 7800 and 8800 Series allowing denial of service attacks. Find mitigation steps and patching details here.
A vulnerability in the call-handling function of Cisco IP Phone 7800 Series and 8800 Series phones using SIP could allow unauthorized individuals to launch a denial of service attack.
Understanding CVE-2018-0325
What is CVE-2018-0325?
The flaw in the SIP call-handling function of Cisco IP Phone 7800 Series and 8800 Series phones allows attackers to initiate a denial of service attack by sending manipulated SIP packets.
The Impact of CVE-2018-0325
The vulnerability could lead to a denial of service situation by terminating all active phone calls on the affected phone.
Technical Details of CVE-2018-0325
Vulnerability Description
- Inadequate validation of SIP Session Description Protocol (SDP) parameters by the SDP parser on affected phones
- Exploitable by sending a manipulated SIP packet
- Results in termination of active phone calls and SIP process restart
Affected Systems and Versions
- Cisco IP Phone 7800 Series and 8800 Series
Exploitation Mechanism
- Attacker sends a manipulated SIP packet to the targeted phone
Mitigation and Prevention
Immediate Steps to Take
- Apply the necessary security patches provided by Cisco
- Monitor network traffic for any suspicious activity
- Implement strong firewall rules to filter and block malicious SIP packets
Long-Term Security Practices
- Regularly update and patch all network-connected devices
- Conduct security training for employees to recognize and report suspicious activities
Patching and Updates
- Cisco has released patches to address the vulnerability in the affected phone models