CVE-2020-4355 : What You Need to Know
Learn about CVE-2020-4355 impacting IBM DB2 for Linux, UNIX, and Windows versions 9.7 to 11.5. Find out the severity, impact, and mitigation steps for this SSL renegotiation vulnerability.
IBM DB2 for Linux, UNIX, and Windows versions 9.7, 10.1, 10.5, 11.1, and 11.5 is susceptible to a denial of service vulnerability due to improper handling of SSL renegotiation requests.
Understanding CVE-2020-4355
IBM DB2 for Linux, UNIX, and Windows is impacted by a denial of service vulnerability that could be exploited by a remote attacker to disrupt system availability.
What is CVE-2020-4355?
- The vulnerability in IBM DB2 for Linux, UNIX, and Windows arises from inadequate handling of SSL renegotiation requests.
- An attacker can leverage specially-crafted requests to trigger a denial of service, leading to increased resource consumption on the system.
The Impact of CVE-2020-4355
- CVSS Base Score: 5.3 (Medium Severity)
- Attack Vector: Network
- Attack Complexity: Low
- Availability Impact: Low
- Exploit Code Maturity: Unproven
- Vector String: CVSS:3.0/I:N/AV:N/S:U/C:N/UI:N/PR:N/A:L/AC:L/RC:C/RL:O/E:U
Technical Details of CVE-2020-4355
IBM DB2 for Linux, UNIX, and Windows is affected by a denial of service vulnerability with the following technical details:
Vulnerability Description
- The vulnerability is a result of improper handling of SSL renegotiation requests.
Affected Systems and Versions
- Products: DB2 for Linux, UNIX, and Windows
- Versions: 9.7, 10.1, 10.5, 11.1, 11.5
Exploitation Mechanism
- Attackers can exploit this vulnerability by sending specially-crafted requests to the system, causing resource exhaustion and a denial of service condition.
Mitigation and Prevention
IBM provides the following recommendations to mitigate the CVE-2020-4355 vulnerability:
Immediate Steps to Take
- Apply the official fix provided by IBM to address the vulnerability.
- Monitor system resources for any unusual spikes in usage that could indicate a potential attack.
Long-Term Security Practices
- Regularly update and patch IBM DB2 for Linux, UNIX, and Windows to ensure protection against known vulnerabilities.
Patching and Updates
- Stay informed about security bulletins and updates from IBM to promptly address any new vulnerabilities.