CVE-2022-29225 : What You Need to Know
Discover the zip bomb vulnerability in Envoy affecting versions prior to 1.22.1. Learn about the impact, affected systems, exploitation mechanism, and mitigation steps.
A zip bomb vulnerability has been identified in Envoy affecting versions prior to 1.22.1. This vulnerability can lead to a denial of service attack by exhausting system memory through maliciously constructed zip files. Users are advised to upgrade to a secure version.
Understanding CVE-2022-29225
This section provides insights into the nature and impact of the zip bomb vulnerability in Envoy.
What is CVE-2022-29225?
Envoy, a cloud-native high-performance proxy, contains a vulnerability in versions before 1.22.1. Attackers can exploit this flaw by sending highly compressed payloads, leading to system memory exhaustion and potential denial of service.
The Impact of CVE-2022-29225
The vulnerability poses a high severity risk with a CVSS base score of 7.5. It can be exploited remotely without requiring privileges, resulting in a potential denial of service attack.
Technical Details of CVE-2022-29225
In this section, we delve into the technical aspects of the vulnerability.
Vulnerability Description
Before overwriting the body in the decode/encodeBody process, decompressors in affected Envoy versions accumulate decompressed data into an intermediate buffer. This behavior allows attackers to create zip bomb scenarios.
Affected Systems and Versions
Envoy versions prior to 1.22.1 are vulnerable to this zip bomb attack. Users of these versions are at risk and should take immediate action to mitigate the threat.
Exploitation Mechanism
By sending a small highly compressed payload, attackers can trigger the zip bomb vulnerability in affected Envoy instances, potentially causing a denial of service.
Mitigation and Prevention
Here we discuss the steps to mitigate the risk posed by CVE-2022-29225.
Immediate Steps to Take
Users are strongly advised to upgrade Envoy to version 1.22.1 or newer to address the zip bomb vulnerability. If upgrading is not feasible, consider disabling decompression as a temporary measure.
Long-Term Security Practices
It is crucial for organizations to regularly update their software and dependencies to prevent security vulnerabilities like the zip bomb exploit.
Patching and Updates
Stay informed about security advisories and patches released by Envoy to promptly address any new vulnerabilities and enhance system security.