CVE-2021-29622 : Vulnerability Insights and Analysis
Learn about CVE-2021-29622 affecting Prometheus, enabling attackers to craft URLs for unauthorized redirects. Find mitigation steps and version patches.
This article provides insights into CVE-2021-29622, focusing on the vulnerability in Prometheus that allows arbitrary redirects under the /new endpoint.
Understanding CVE-2021-29622
CVE-2021-29622 is a security vulnerability in Prometheus that enables attackers to redirect users to arbitrary URLs via a specially crafted address under the /new endpoint.
What is CVE-2021-29622?
Prometheus, an open-source monitoring system and time series database, introduced a bug that allows attackers to manipulate URLs and redirect users to unintended destinations through the /new endpoint.
The Impact of CVE-2021-29622
The vulnerability poses a medium severity threat with a base score of 6.5 (CVSS v3.1), allowing attackers to compromise the integrity of the system without requiring user privileges.
Technical Details of CVE-2021-29622
The technical details of this CVE include a CWE-601 vulnerability related to URL redirection to untrusted sites ('Open Redirect').
Vulnerability Description
In Prometheus versions between 2.23.0 and 2.27.1, a bug existed that facilitated URL manipulation, leading to unauthorized redirection under the /new endpoint.
Affected Systems and Versions
Systems running Prometheus versions >= 2.23.0 and < 2.27.1 are vulnerable to this exploit.
Exploitation Mechanism
Attackers can exploit this vulnerability by crafting malicious URLs that trigger unauthorized redirects on user visits to Prometheus servers.
Mitigation and Prevention
To address CVE-2021-29622, immediate and proactive steps are necessary to prevent security breaches.
Immediate Steps to Take
Users are advised to update Prometheus to versions 2.26.1 or 2.27.1, where the issue has been patched. Additionally, enforcing access restrictions via reverse proxies can mitigate risks.
Long-Term Security Practices
Regular security audits, code reviews, and awareness training can enhance overall system security and reduce the likelihood of similar vulnerabilities.
Patching and Updates
Stay informed about security updates from Prometheus, and promptly apply patches to ensure a secure monitoring environment.