CVE-2023-28488 : Security Advisory and Response

This CVE, assigned the ID CVE-2023-28488, was published on April 12, 2023, by MITRE. It involves a vulnerability in the client.c component of gdhcp in ConnMan up to version 1.41. Attackers operating a crafted DHCP server could potentially exploit this vulnerability to execute a stack-based buffer overflow leading to a denial of service, ultimately terminating the connman process.

Understanding CVE-2023-28488

This section delves into the details of CVE-2023-28488, shedding light on what exactly this vulnerability entails and the impact it can have.

What is CVE-2023-28488?

The CVE-2023-28488 vulnerability lies within the client.c module of gdhcp in ConnMan, offering an avenue for network-adjacent attackers to trigger a stack-based buffer overflow. This could result in a denial of service situation, causing the connman process to terminate abruptly.

The Impact of CVE-2023-28488

The impact of CVE-2023-28488 is significant as it opens the door for attackers to disrupt the connman process through a crafted DHCP server, potentially leading to service downtime and system instability.

Technical Details of CVE-2023-28488

Exploring the technical aspects of CVE-2023-28488 provides a better understanding of the vulnerability, including how it can be exploited and the systems it affects.

Vulnerability Description

The vulnerability originates in the client.c file of gdhcp in ConnMan, allowing malicious actors to execute a stack-based buffer overflow by manipulating a DHCP server. This exploitation can lead to a denial of service, causing the connman process to cease functioning.

Affected Systems and Versions

As per reports, all versions of ConnMan up to version 1.41 are affected by CVE-2023-28488. This implies that systems utilizing these versions may be susceptible to the stack-based buffer overflow and subsequent denial of service.

Exploitation Mechanism

Attackers can exploit CVE-2023-28488 by leveraging a crafted DHCP server, positioned adjacent to the target network. Through this approach, they can trigger the stack-based buffer overflow within the client.c module of gdhcp, compromising the connman process.

Mitigation and Prevention

Taking proactive steps to mitigate the risks posed by CVE-2023-28488 is crucial to ensuring the security and stability of affected systems.

Immediate Steps to Take

Immediate actions should include applying security patches provided by ConnMan or relevant software vendors to address the vulnerability promptly. Additionally, network administrators are advised to monitor network traffic for any suspicious DHCP server activities.

Long-Term Security Practices

Establishing robust network security protocols, such as segmentation and access controls, can help limit the exposure of critical systems to potential attacks. Regular security audits and updates are also essential for maintaining a secure IT environment.

Patching and Updates

Stay informed about security advisories from ConnMan, Debian, and other relevant sources to promptly apply patches and updates addressing CVE-2023-28488. Timely maintenance of software versions can help prevent exploitation of known vulnerabilities and enhance overall system security.