CVE-2021-35945 : What You Need to Know
Learn about CVE-2021-35945 affecting Couchbase Server versions 6.5.x, 6.6.0-6.6.2, 7.0.0. Understand the impact, technical details, and mitigation steps for this Buffer Overflow flaw.
Couchbase Server versions 6.5.x, 6.6.0 through 6.6.2, and 7.0.0 are affected by a Buffer Overflow vulnerability. An attacker can crash memcached by sending a specially crafted network packet.
Understanding CVE-2021-35945
This section delves into the details of the CVE-2021-35945 vulnerability.
What is CVE-2021-35945?
CVE-2021-35945 is a vulnerability in Couchbase Server versions 6.5.x, 6.6.0 through 6.6.2, and 7.0.0 that allows an attacker to crash memcached through a Buffer Overflow triggered by a specially crafted network packet.
The Impact of CVE-2021-35945
The impact of this vulnerability includes a denial of service (DoS) scenario where an attacker can disrupt the availability of the affected Couchbase Servers.
Technical Details of CVE-2021-35945
In this section, we explore the technical aspects of the CVE-2021-35945 vulnerability.
Vulnerability Description
The vulnerability resides in how Couchbase Server handles network packets, leading to a Buffer Overflow condition that results in crashing memcached.
Affected Systems and Versions
Couchbase Server versions 6.5.x, 6.6.0 through 6.6.2, and 7.0.0 are affected by this vulnerability.
Exploitation Mechanism
An attacker can exploit this vulnerability by sending a specially crafted network packet to the vulnerable Couchbase Server, triggering the Buffer Overflow and crashing memcached.
Mitigation and Prevention
This section provides insights into mitigating and preventing the exploitation of CVE-2021-35945.
Immediate Steps to Take
- Update Couchbase Server to the latest patched version that addresses the Buffer Overflow vulnerability.
- Monitor network traffic for any suspicious activities targeting memcached.
Long-Term Security Practices
- Regularly update and patch Couchbase Server to protect against known vulnerabilities.
- Implement network security measures to restrict access to vulnerable services.
Patching and Updates
Refer to the official Couchbase Server release notes and alerts for patching instructions and updates to safeguard Couchbase Server against CVE-2021-35945.