CVE-2021-21287 : Vulnerability Insights and Analysis
Discover how CVE-2021-21287 affects MinIO, a High Performance Object Storage, exposing servers to SSRF vulnerabilities. Learn about the impact, technical details, and mitigation steps.
A High Performance Object Storage, MinIO, before version RELEASE.2021-01-30T00-20-58Z is affected by a server-side request forgery vulnerability that allows an attacker to manipulate URLs leading to potential server exposure. Here's what you need to know about CVE-2021-21287:
Understanding CVE-2021-21287
MinIO, an Apache License v2.0 Object Storage, is susceptible to server-side request forgery, potentially enabling attackers to read or update internal resources by manipulating URLs.
What is CVE-2021-21287?
In MinIO versions before RELEASE.2021-01-30T00-20-58Z, an SSRF vulnerability exists which permits attackers to modify URLs to access internal resources and sensitive data, resulting in server exploitation.
The Impact of CVE-2021-21287
The vulnerability poses a high severity threat with a CVSS base score of 7.7, allowing attackers to access confidential data, perform unauthorized operations, and exploit server configurations.
Technical Details of CVE-2021-21287
The technical specifics of the CVE include:
Vulnerability Description
Server-side request forgery vulnerability in MinIO's browser API enables attackers to interact with internal services and potentially read sensitive server configurations.
Affected Systems and Versions
MinIO versions earlier than RELEASE.2021-01-30T00-20-58Z are impacted by this vulnerability, exposing them to SSRF attacks.
Exploitation Mechanism
Attackers can manipulate URLs within MinIO, allowing them to access internal resources, confidential data, and even intercept HTTP requests to internal services.
Mitigation and Prevention
To address CVE-2021-21287, consider the following steps:
Immediate Steps to Take
Upgrade MinIO to version RELEASE.2021-01-30T00-20-58Z or later to mitigate the SSRF vulnerability. Additionally, you can disable the browser front-end by setting the "MINIO_BROWSER=off" environment variable.
Long-Term Security Practices
Implement robust URL validation mechanisms, restrict server access, and regularly update MinIO installations to prevent security risks.
Patching and Updates
Regularly monitor for security advisories from MinIO and apply patches promptly to protect your system from potential SSRF attacks.