CVE-2020-36228 : Security Advisory and Response
Learn about CVE-2020-36228, an integer underflow vulnerability in OpenLDAP before 2.4.57, leading to a slapd crash and denial of service. Find mitigation steps and update information here.
An integer underflow in OpenLDAP before version 2.4.57 can lead to a slapd crash in the Certificate List Exact Assertion processing, resulting in denial of service.
Understanding CVE-2020-36228
This CVE involves an integer underflow vulnerability in OpenLDAP, impacting its version before 2.4.57.
What is CVE-2020-36228?
CVE-2020-36228 is an integer underflow vulnerability found in OpenLDAP, which can trigger a slapd crash during Certificate List Exact Assertion processing, causing a denial of service.
The Impact of CVE-2020-36228
The vulnerability can be exploited to crash the slapd service, leading to a denial of service condition for systems running the affected OpenLDAP versions.
Technical Details of CVE-2020-36228
This section provides more in-depth technical insights into the CVE.
Vulnerability Description
The integer underflow in OpenLDAP before version 2.4.57 triggers a crash in the Certificate List Exact Assertion processing, resulting in a denial of service.
Affected Systems and Versions
- Product: n/a
- Vendor: n/a
- Versions affected: All versions before 2.4.57
Exploitation Mechanism
The vulnerability can be exploited by an attacker to craft a malicious input that triggers the integer underflow, leading to a crash in the Certificate List Exact Assertion processing.
Mitigation and Prevention
Protecting systems from CVE-2020-36228 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply security updates provided by OpenLDAP promptly.
- Monitor vendor advisories for patches and mitigation guidance.
- Implement network security measures to detect and block potential exploitation attempts.
Long-Term Security Practices
- Regularly update and patch software to mitigate known vulnerabilities.
- Conduct security assessments and penetration testing to identify and address weaknesses.
- Educate users and administrators about secure coding practices and the importance of timely updates.
Patching and Updates
- OpenLDAP has released version 2.4.57, which addresses the integer underflow vulnerability. Ensure all affected systems are updated to this patched version.