CVE-2019-1892 : Vulnerability Insights and Analysis
Learn about CVE-2019-1892, a high-severity vulnerability in Cisco Small Business Series Switches that can lead to memory corruption. Find out the impact, affected systems, exploitation details, and mitigation steps.
Cisco Small Business Series Switches Memory Corruption Vulnerability
Understanding CVE-2019-1892
This CVE involves a vulnerability in the Secure Sockets Layer (SSL) input packet processor of Cisco Small Business 200, 300, and 500 Series Managed Switches, potentially leading to memory corruption on affected devices.
What is CVE-2019-1892?
The vulnerability arises from inadequate validation of HTTPS packets, allowing unauthorized remote attackers to exploit it by sending malformed HTTPS packets to the device's management web interface, leading to a denial of service (DoS) situation.
The Impact of CVE-2019-1892
- CVSS Base Score: 7.5 (High Severity)
- Attack Vector: Network
- Availability Impact: High
- No Confidentiality or Integrity Impact
Technical Details of CVE-2019-1892
This section provides more in-depth technical insights into the vulnerability.
Vulnerability Description
The vulnerability allows attackers to cause memory corruption on affected Cisco Small Business Series Managed Switches by exploiting the SSL input packet processor.
Affected Systems and Versions
- Affected Product: Cisco Small Business 300 Series Managed Switches
- Vendor: Cisco
- Vulnerable Versions: Less than 1.4.10.6 (Custom Version)
Exploitation Mechanism
Attackers can exploit this vulnerability by sending malformed HTTPS packets to the device's management web interface, triggering an unexpected reload and leading to a DoS scenario.
Mitigation and Prevention
It is crucial to take immediate steps to address and prevent the exploitation of this vulnerability.
Immediate Steps to Take
- Apply vendor-provided patches or updates promptly.
- Implement network segmentation to limit the impact of potential attacks.
- Monitor network traffic for any signs of malicious activity.
Long-Term Security Practices
- Regularly update and patch all network devices and software.
- Conduct security assessments and penetration testing to identify and address vulnerabilities.
- Educate users and administrators about safe browsing practices and security protocols.
- Implement strong access controls and authentication mechanisms.
Patching and Updates
- Check the vendor's security advisory for specific patch details and instructions.
- Ensure all affected devices are updated to a secure version to mitigate the risk of exploitation.