CVE-2018-0172 : Vulnerability Insights and Analysis
Learn about CVE-2018-0172 affecting Cisco IOS and IOS XE Software, allowing a remote attacker to trigger a device reload, leading to a denial of service (DoS) situation. Find mitigation steps and patch information here.
Cisco IOS and IOS XE Software are affected by a vulnerability in the DHCP option 82 encapsulation feature, potentially leading to a denial of service (DoS) attack. The flaw allows a remote attacker to trigger a device reload, causing a DoS situation.
Understanding CVE-2018-0172
This CVE involves a vulnerability in Cisco IOS and IOS XE Software that could be exploited by an unauthenticated attacker to force a device reload, resulting in a DoS scenario.
What is CVE-2018-0172?
The vulnerability stems from inadequate validation of option 82 information in DHCPv4 packets, allowing an attacker to send manipulated packets to the device, leading to a heap overflow condition and subsequent device reload.
The Impact of CVE-2018-0172
The vulnerability could be exploited by a remote attacker without authentication, potentially causing a DoS situation by forcing a reload of the affected device. Successful exploitation could lead to a heap overflow condition and subsequent device reload.
Technical Details of CVE-2018-0172
Cisco IOS and IOS XE Software are affected by a vulnerability in the DHCP option 82 encapsulation feature, potentially leading to a denial of service (DoS) attack.
Vulnerability Description
The flaw in the DHCP option 82 encapsulation feature allows a remote attacker to cause a denial of service (DoS) situation by forcing a reload of the affected device.
Affected Systems and Versions
- Product: Cisco IOS and IOS XE
- Version: Cisco IOS and IOS XE
Exploitation Mechanism
- Attacker sends manipulated DHCPv4 packet to the targeted device
- Results in a heap overflow condition, causing a device reload and subsequent DoS situation
Mitigation and Prevention
Immediate Steps to Take:
- Apply the necessary security updates provided by Cisco
- Monitor network traffic for any suspicious activity
Long-Term Security Practices:
- Regularly update and patch all software and firmware
- Implement network segmentation and access controls to limit exposure
Patching and Updates:
- Cisco has released patches to address this vulnerability