CVE-2020-6078 : Security Advisory and Response
Learn about CVE-2020-6078, a high-severity denial-of-service vulnerability in Videolabs libmicrodns 0.1.0. Find out the impact, affected systems, exploitation details, and mitigation steps.
An exploitable denial-of-service vulnerability exists in the message-parsing functionality of Videolabs libmicrodns 0.1.0. When parsing mDNS messages in mdns_recv, the return value of the mdns_read_header function is not checked, leading to an uninitialized variable usage that eventually results in a null pointer dereference, leading to service crash. An attacker can send a series of mDNS messages to trigger this vulnerability.
Understanding CVE-2020-6078
This CVE involves a denial-of-service vulnerability in Videolabs libmicrodns 0.1.0.
What is CVE-2020-6078?
CVE-2020-6078 is a vulnerability in Videolabs libmicrodns 0.1.0 that allows an attacker to cause a denial-of-service condition by sending specially crafted mDNS messages.
The Impact of CVE-2020-6078
The impact of this vulnerability is rated as high with a CVSS base score of 7.5. It can lead to a service crash due to a null pointer dereference.
Technical Details of CVE-2020-6078
This section provides more technical insights into the vulnerability.
Vulnerability Description
The vulnerability arises from the lack of checking the return value of the mdns_read_header function, leading to a null pointer dereference.
Affected Systems and Versions
- Product: Videolabs
- Version: Videolabs libmicrodns 0.1.0
Exploitation Mechanism
The vulnerability can be exploited by sending a series of mDNS messages to trigger the uninitialized variable usage.
Mitigation and Prevention
Protecting systems from CVE-2020-6078 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply vendor patches or updates promptly.
- Implement network-level protections to filter out potentially malicious mDNS messages.
Long-Term Security Practices
- Regularly update and patch software to address known vulnerabilities.
- Conduct security assessments and audits to identify and mitigate potential risks.
Patching and Updates
Ensure that the affected software, Videolabs libmicrodns 0.1.0, is updated with the latest patches to remediate the vulnerability.