CVE-2017-3820 : What You Need to Know
Discover the impact of CVE-2017-3820, a vulnerability in SNMP functions of Cisco ASR 1000 Series Routers running specific Cisco IOS XE Software versions, potentially leading to a denial of service (DoS) attack. Learn about affected systems, exploitation risks, and mitigation steps.
A weakness in the Simple Network Management Protocol (SNMP) functions of Cisco ASR 1000 Series Aggregation Services Routers running Cisco IOS XE Software could lead to a denial of service (DoS) attack.
Understanding CVE-2017-3820
This CVE identifies a vulnerability in SNMP functions of Cisco ASR 1000 Series Routers running specific Cisco IOS XE Software versions.
What is CVE-2017-3820?
The vulnerability allows a remote authenticated attacker to cause significant CPU usage on the device, potentially resulting in a DoS situation.
The Impact of CVE-2017-3820
Exploitation of this vulnerability could lead to a denial of service condition on the affected device, impacting its availability and performance.
Technical Details of CVE-2017-3820
This section provides more in-depth technical insights into the CVE.
Vulnerability Description
The vulnerability in SNMP functions of Cisco ASR 1000 Series Routers running Cisco IOS XE Software could be exploited by a remote authenticated attacker to cause high CPU usage, leading to a DoS situation.
Affected Systems and Versions
- Affected Product: Cisco IOS XE 15.x
- Affected Versions: 3.13.6S, 3.16.2S, 3.17.1S, 15.5(3)S2.1, 15.6(1)S1.1
Exploitation Mechanism
The vulnerability could be exploited by a remote authenticated attacker to trigger high CPU usage on the affected device, potentially causing a DoS condition.
Mitigation and Prevention
Protecting systems from CVE-2017-3820 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply the necessary patches provided by Cisco to address the vulnerability.
- Monitor network traffic for any suspicious activity that could indicate exploitation attempts.
Long-Term Security Practices
- Regularly update and patch network devices to mitigate potential vulnerabilities.
- Implement strong access controls and authentication mechanisms to prevent unauthorized access.
Patching and Updates
Ensure that affected systems are updated with the fixed software versions released by Cisco to eliminate the vulnerability.