CVE-2022-30591 Explained : Impact and Mitigation
Learn about CVE-2022-30591, a vulnerability in quic-go versions up to 0.27.0 allowing remote attackers to trigger CPU consumption denial of service. Find out the impact, affected systems, and mitigation steps.
quic-go through 0.27.0 allows remote attackers to cause a denial of service (CPU consumption) via a Slowloris variant in which incomplete QUIC or HTTP/3 requests are sent. This occurs because mtu_discoverer.go misparses the MTU Discovery service and consequently overflows the probe timer. Note: the vendor's position is that this behavior should not be listed as a vulnerability on the CVE List
Understanding CVE-2022-30591
This section provides an overview of the CVE-2022-30591 vulnerability.
What is CVE-2022-30591?
CVE-2022-30591 relates to a vulnerability in quic-go versions up to 0.27.0, allowing remote attackers to trigger a denial of service (DoS) attack by exploiting a Slowloris variant. The issue arises due to a misparsing of the MTU Discovery service, leading to CPU consumption through overflow of the probe timer.
The Impact of CVE-2022-30591
The impact of CVE-2022-30591 can result in a significant disruption of service for affected systems, potentially leading to downtime and performance issues.
Technical Details of CVE-2022-30591
In this section, we delve into the technical aspects of CVE-2022-30591.
Vulnerability Description
The vulnerability in quic-go allows for CPU consumption via a Slowloris attack vector, initiated by sending incomplete QUIC or HTTP/3 requests that trigger the misparsing of the MTU Discovery service.
Affected Systems and Versions
quic-go versions up to 0.27.0 are affected by this vulnerability.
Exploitation Mechanism
Remote attackers can exploit this vulnerability by sending malformed requests, causing the probe timer to overflow and resulting in increased CPU consumption.
Mitigation and Prevention
Discover the steps to mitigate and prevent CVE-2022-30591 in the following section.
Immediate Steps to Take
To mitigate the risk associated with CVE-2022-30591, consider implementing network-level controls and filtering mechanisms to detect and block malformed requests.
Long-Term Security Practices
Incorporate regular security assessments and code reviews to identify and address vulnerabilities promptly, reducing the likelihood of successful exploitation.
Patching and Updates
Ensure that systems running quic-go are updated to versions beyond 0.27.0, where the vulnerability has been addressed.