CVE-2020-21788 : Security Advisory and Response

CRMEB 3.1.0+ strict domain name filtering leads to SSRF (Server-Side Request Forgery) vulnerability in /crmeb/app/admin/controller/store/CopyTaobao.php.

Understanding CVE-2020-21788

This CVE involves a security vulnerability in CRMEB version 3.1.0+ that can be exploited for SSRF attacks.

What is CVE-2020-21788?

CRMEB 3.1.0+ has a flaw in its domain name filtering mechanism, allowing attackers to perform SSRF attacks by manipulating server requests.

The Impact of CVE-2020-21788

The vulnerability can be exploited by malicious actors to bypass security controls, potentially leading to unauthorized access to internal systems or sensitive data.

Technical Details of CVE-2020-21788

CRMEB 3.1.0+ strict domain name filtering vulnerability details.

Vulnerability Description

The vulnerability in CRMEB 3.1.0+ allows SSRF attacks due to inadequate domain name filtering, enabling attackers to make unauthorized requests.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions: All versions of CRMEB 3.1.0+

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating the domain name filtering mechanism to craft malicious requests and access internal resources.

Mitigation and Prevention

Steps to mitigate and prevent the CVE-2020-21788 vulnerability.

Immediate Steps to Take

Disable or restrict access to the affected component/file.
Implement input validation to prevent malicious input.
Regularly monitor and analyze server logs for suspicious activities.

Long-Term Security Practices

Conduct regular security assessments and penetration testing.
Keep software and systems up to date with the latest security patches.

Patching and Updates

Apply patches or updates provided by the software vendor to address the SSRF vulnerability in CRMEB 3.1.0+.