CVE-2023-27882 : Vulnerability Insights and Analysis

This CVE-2023-27882 involves a heap-based buffer overflow vulnerability in the HTTP Server form boundary functionality of Weston Embedded uC-HTTP v3.01.01. This vulnerability allows an attacker to execute malicious code by sending a specially crafted network packet.

Understanding CVE-2023-27882

This section delves into the details of CVE-2023-27882, its impact, technical aspects, and mitigation strategies.

What is CVE-2023-27882?

CVE-2023-27882 is a heap-based buffer overflow vulnerability present in the HTTP Server component of Weston Embedded uC-HTTP v3.01.01. A threat actor can exploit this flaw by transmitting a malicious network packet, potentially leading to arbitrary code execution.

The Impact of CVE-2023-27882

The impact of CVE-2023-27882 is rated as critical. Due to the nature of the vulnerability, an attacker can take advantage of this security flaw to compromise the confidentiality, integrity, and availability of affected systems. The CVSS base score is 9, highlighting the severity of the issue.

Technical Details of CVE-2023-27882

In this section, we will explore the vulnerability description, affected systems and versions, as well as the exploitation mechanism associated with CVE-2023-27882.

Vulnerability Description

The vulnerability manifests as a heap-based buffer overflow within the HTTP Server form boundary functionality of Weston Embedded uC-HTTP v3.01.01. By sending a specifically crafted network packet, an attacker can trigger the overflow, potentially leading to unauthorized code execution.

Affected Systems and Versions

The following systems and versions are confirmed to be impacted by CVE-2023-27882:

Vendor: Silicon Labs
Product: Gecko Platform
Version: 4.3.1.0
Vendor: Weston Embedded
Product: Cesium NET
Version: 3.07.01
Vendor: Weston Embedded
Product: uC-HTTP
Version: v3.01.01

Exploitation Mechanism

The vulnerability in question can be exploited by an adversary who sends a specially crafted network packet to the affected HTTP server. By doing so, the attacker can trigger the heap-based buffer overflow, potentially gaining the ability to execute arbitrary code within the context of the affected system.

Mitigation and Prevention

To address and mitigate the risks associated with CVE-2023-27882, organizations and users are advised to take immediate steps and implement long-term security practices.

Immediate Steps to Take

Organizations should consider applying security patches promptly once they are made available by the vendors.
Network administrators can also implement network monitoring and intrusion detection systems to detect any unusual traffic patterns.
It is recommended to restrict network access to vulnerable systems and servers until patches are applied.

Long-Term Security Practices

Regular security assessments and penetration testing of systems can help identify and address potential vulnerabilities preemptively.
Enforcing the principle of least privilege and ensuring proper input validation in network-facing applications can help mitigate future risks.
Educating employees and users on the importance of cybersecurity awareness can enhance overall security posture.

Patching and Updates

Silicon Labs and Weston Embedded should release patches addressing CVE-2023-27882 for the affected versions promptly. Organizations are strongly advised to apply these patches as soon as they become available to protect their systems from potential exploitation.