CVE-2022-27158 in pearweb
Summary
by MITRE • 04/15/2022
pearweb < 1.32 suffers from Deserialization of Untrusted Data.
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Analysis
by VulDB Data Team • 05/25/2026
The vulnerability in pearweb versions prior to 1.32 represents a critical deserialization flaw that falls under the CWE-502 category, specifically addressing the dangerous practice of deserializing untrusted data. This vulnerability exposes the application to potential remote code execution attacks through maliciously crafted serialized objects that can be manipulated during the object reconstruction process. The flaw occurs when the application accepts serialized data from external sources without proper validation or sanitization, creating an avenue for attackers to inject malicious payloads that execute arbitrary code on the target system.
The technical implementation of this vulnerability stems from the application's failure to implement proper input validation mechanisms during the deserialization phase. When pearweb processes serialized data, it does not adequately verify the integrity or origin of the serialized objects, allowing attackers to craft malicious payloads that exploit the underlying deserialization libraries. This weakness creates a direct pathway for attackers to execute arbitrary commands on the server, potentially leading to complete system compromise and unauthorized access to sensitive data. The vulnerability operates at the application layer and can be exploited through various attack vectors including web requests, file uploads, or any mechanism that accepts serialized input.
The operational impact of this vulnerability extends beyond simple data corruption or service disruption, as it fundamentally compromises the integrity and confidentiality of the affected system. Attackers can leverage this flaw to establish persistent backdoors, escalate privileges, or exfiltrate sensitive information from the server environment. The vulnerability affects the availability of services through potential denial of service conditions and creates long-term security risks that can persist until the underlying issue is properly addressed. Organizations running affected versions of pearweb face significant exposure to advanced persistent threats and automated exploitation attempts that target this specific weakness.
Mitigation strategies for this vulnerability require immediate implementation of proper input validation and sanitization procedures throughout the application's data handling processes. Security measures should include implementing strict type checking during deserialization operations, utilizing safe serialization formats that do not allow arbitrary code execution, and employing secure coding practices that prevent the processing of untrusted data. Organizations should also implement network segmentation, monitor for suspicious deserialization activities, and conduct regular security assessments to identify similar vulnerabilities across their software ecosystem. The remediation process involves upgrading to pearweb version 1.32 or later, which includes proper validation mechanisms and secure deserialization practices that align with industry standards and best practices for preventing such vulnerabilities.