CVE-2021-3007 Scanner

The Laminas Project provides components for developing high-quality PHP web applications, and laminas-http is a specific package for client and server HTTP utilities. It is widely used by developers to facilitate HTTP requests and responses in PHP applications. Organizations and individuals incorporate laminas-http in their applications to ensure robust HTTP protocol capabilities. Its user base spans across various industries leveraging PHP for their web solutions. Developers rely on its stable and consistent interface to manage HTTP interactions. The package's seamless integration with Zend Framework components enhances its widespread use.

The vulnerability, identified as CVE-2021-3007, is associated with a remote code execution (RCE) flaw within the Laminas Project's laminas-http component. It stems from a deserialization mishap triggered by the destructor method in Zend\Http\Response\Stream. Attackers can exploit this by controlling the content of serialized data, leading to unauthorized code execution. This vulnerability primarily results from inadequate input validation and improper handling of serialized inputs. With this flaw, an attacker can inject and execute arbitrary code on the affected system. It aligned with critical-impact vulnerabilities because it can completely compromise the server's integrity.

Technical details reveal that the deserialization vulnerability resides in the __destruct method of Zend\Http\Response\Stream. Attackers exploit this by inserting specially crafted serialized objects that manipulate the system's processing sequence. The vulnerability primarily targets the PHP serialize and deserialize functionality, making the laminas-http and Zend Framework vulnerable to malicious serialized inputs. The vulnerable parameter orchestrates the system's operational flow, allowing remote code execution when manipulated. Such manipulation can lead to significant unauthorized activities on the affected server. The exploit requires attackers to have control over the serialized data input provided to the HTTP component.

If exploited, this vulnerability allows malicious entities to gain remote access and execute arbitrary code in the context of the server process. The implications include unauthorized server control, data breaches, and potential escalation of privileges. It could also lead to denial of service if attacked repeatedly. As a critical flaw, it exposes the server to a host of malicious activities including the propagation of malware or unauthorized access to sensitive data. Its remote execution nature makes it a severe threat, with widespread potential damage to operations relying on the vulnerable versions.

REFERENCES

• https://github.com/Ling-Yizhou/zendframework3-/blob/main/zend%20framework3%20%E5%8F%8D%E5%BA%8F%E5%88%97%E5%8C%96%20rce.md
• https://research.checkpoint.com/2021/freakout-leveraging-newest-vulnerabilities-for-creating-a-botnet/