CVE-2022-23098 : Security Advisory and Response

An issue was discovered in the DNS proxy in Connman through 1.40. The TCP server reply implementation has an infinite loop if no data is received.

Understanding CVE-2022-23098

This CVE describes a vulnerability in the DNS proxy of Connman up to version 1.40, where the TCP server reply implementation may lead to an infinite loop under certain conditions.

What is CVE-2022-23098?

The CVE-2022-23098 vulnerability pertains to an issue in the DNS proxy component of Connman up to version 1.40. Specifically, the TCP server reply implementation of the DNS proxy can enter an infinite loop when no data is received, potentially leading to service disruption.

The Impact of CVE-2022-23098

Exploitation of this vulnerability could result in a denial of service (DoS) condition, causing the affected system to become unresponsive or inaccessible to legitimate users. Attackers could potentially leverage this flaw to disrupt network operations and services.

Technical Details of CVE-2022-23098

This section provides further insights into the vulnerability, including its description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability in the TCP server reply implementation of the DNS proxy in Connman through version 1.40 allows an attacker to trigger an infinite loop by sending specially crafted requests, leading to a DoS condition.

Affected Systems and Versions

All versions of Connman up to 1.40 are affected by this vulnerability. Users are advised to update to a patched version to mitigate the risk.

Exploitation Mechanism

An attacker can exploit this vulnerability by sending malicious requests to the TCP server reply implementation in the DNS proxy of Connman. This can result in the server entering an infinite loop, consuming resources and causing a DoS scenario.

Mitigation and Prevention

To address CVE-2022-23098 and enhance system security, it is crucial to take immediate steps, adopt long-term security practices, and prioritize patching and updates.

Immediate Steps to Take

Update Connman to a fixed version that addresses the vulnerability.
Monitor network traffic for any suspicious activity targeting the DNS proxy.

Long-Term Security Practices

Implement network segmentation to isolate critical systems from potential threats.
Conduct regular security assessments and audits to identify and remediate vulnerabilities.

Patching and Updates

Stay informed about security advisories and patches released by Connman.
Apply updates promptly to ensure that known vulnerabilities are patched and system integrity is maintained.