CVE-2020-3244 : Exploit Details and Defense Strategies
Learn about CVE-2020-3244, a vulnerability in Cisco ASR 5000 Series Software that allows remote attackers to bypass traffic classification rules. Find mitigation steps and impact details here.
A vulnerability in the Enhanced Charging Service (ECS) functionality of Cisco ASR 5000 Series Aggregation Services Routers could allow an unauthenticated, remote attacker to bypass traffic classification rules on affected devices.
Understanding CVE-2020-3244
This CVE involves a security vulnerability in Cisco ASR 5000 Series Software that could be exploited by attackers to bypass traffic classification rules.
What is CVE-2020-3244?
The vulnerability in the Enhanced Charging Service (ECS) functionality of Cisco ASR 5000 Series Aggregation Services Routers allows remote attackers to bypass traffic classification rules by sending a malformed HTTP request.
The Impact of CVE-2020-3244
- Attackers can bypass traffic classification rules on affected devices.
- Successful exploitation could allow attackers to avoid being charged for traffic consumption.
Technical Details of CVE-2020-3244
This section provides more technical insights into the vulnerability.
Vulnerability Description
The vulnerability is a result of insufficient input validation of user traffic passing through affected devices, enabling attackers to send malformed HTTP requests.
Affected Systems and Versions
- Product: Cisco ASR 5000 Series Software
- Vendor: Cisco
- Version: n/a
Exploitation Mechanism
- Attack Complexity: Low
- Attack Vector: Network
- Base Score: 5.3 (Medium Severity)
- Integrity Impact: Low
- Privileges Required: None
- User Interaction: None
- Vector String: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Mitigation and Prevention
Protecting systems from this vulnerability is crucial for maintaining security.
Immediate Steps to Take
- Apply vendor-provided patches and updates promptly.
- Monitor network traffic for any suspicious activity.
Long-Term Security Practices
- Regularly update and patch all software and firmware.
- Implement network segmentation to limit the impact of potential attacks.
Patching and Updates
- Stay informed about security advisories from Cisco.
- Implement a robust cybersecurity policy to address vulnerabilities promptly.