CVE-2019-19942 : Vulnerability Insights and Analysis

Swisscom's Centro Grande models, Centro Business 1.0 (ADB), and Centro Business 2.0 are vulnerable to DNS spoofing due to missing output sanitation.

Understanding CVE-2019-19942

This CVE highlights a security vulnerability in Swisscom's networking devices that could be exploited by remote attackers.

What is CVE-2019-19942?

The absence of output sanitation in Swisscom's Centro Grande models before version 6.16.12, Centro Business 1.0 (ADB) before version 7.10.18, and Centro Business 2.0 before version 8.02.04 allows attackers to conduct DNS spoofing through malicious hostnames in DHCP requests.

The Impact of CVE-2019-19942

This vulnerability enables remote attackers to manipulate DNS responses, potentially leading to various malicious activities, including redirecting users to fake websites or intercepting sensitive data.

Technical Details of CVE-2019-19942

Swisscom's devices are susceptible to DNS spoofing attacks due to the lack of output sanitation.

Vulnerability Description

The vulnerability arises from the failure to properly sanitize output in the affected Swisscom models, creating an avenue for attackers to exploit DNS responses.

Affected Systems and Versions

Swisscom Centro Grande models before 6.16.12
Centro Business 1.0 (ADB) models before 7.10.18
Centro Business 2.0 models before 8.02.04

Exploitation Mechanism

Attackers can leverage crafted hostnames in DHCP requests to manipulate DNS responses and carry out spoofing attacks on the web interface of the affected devices.

Mitigation and Prevention

Taking immediate action and implementing long-term security practices are crucial to mitigating the risks associated with CVE-2019-19942.

Immediate Steps to Take

Update the affected Swisscom devices to the latest patched versions.
Monitor DNS traffic for any suspicious activities.
Implement network segmentation to limit the impact of potential spoofing attacks.

Long-Term Security Practices

Regularly update and patch all network devices to address security vulnerabilities.
Conduct security audits and assessments to identify and remediate potential weaknesses in the network infrastructure.

Patching and Updates

Swisscom has released patched versions for Centro Grande, Centro Business 1.0 (ADB), and Centro Business 2.0 to address the output sanitation issue and mitigate the risk of DNS spoofing attacks.