CVE-2021-43562 : Vulnerability Insights and Analysis
Discover the SSRF vulnerability in pixx.io extension before version 1.0.6 for TYPO3 leading to potential Remote Code Execution. Learn about impacted systems, exploitation mechanism, and mitigation steps.
An issue was discovered in the pixxio (aka pixx.io integration or DAM) extension before 1.0.6 for TYPO3, leading to SSRF vulnerability that could result in Remote Code Execution.
Understanding CVE-2021-43562
This CVE describes a vulnerability in the pixxio extension for TYPO3 that allows attackers to download content from a remote location and potentially execute code.
What is CVE-2021-43562?
The pixxio extension in TYPO3 fails to restrict image downloads to the configured pixx.io DAM URL, leading to SSRF. This enables an attacker to download various content from a remote location and potentially achieve Remote Code Execution with the privileges of a TYPO3 backend user.
The Impact of CVE-2021-43562
The vulnerability allows an attacker to exploit the SSRF issue to download content from a remote location and save it with a user-controlled filename, potentially leading to Remote Code Execution.
Technical Details of CVE-2021-43562
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The pixxio extension before version 1.0.6 for TYPO3 does not properly restrict image downloads to the configured pixx.io DAM URL, resulting in SSRF vulnerability.
Affected Systems and Versions
- Product: pixxio integration (aka pixx.io extension)
- Vendor: TYPO3
- Versions affected: Before 1.0.6
Exploitation Mechanism
To exploit this vulnerability, an attacker needs a TYPO3 backend user account to initiate SSRF, download content from a remote location, and potentially execute code.
Mitigation and Prevention
It is crucial to take immediate steps to address and prevent exploitation of this vulnerability.
Immediate Steps to Take
- Update the pixxio extension to version 1.0.6 or newer
- Monitor and restrict network access to prevent SSRF attacks
- Review and secure TYPO3 backend user accounts
Long-Term Security Practices
- Regularly update all extensions and plugins within TYPO3
- Implement network level security controls to mitigate SSRF vulnerabilities
- Educate users on phishing and social engineering tactics
Patching and Updates
- Apply the latest security patches provided by TYPO3 to address this vulnerability