CVE-2022-4245 in codehaus-plexus
Summary
by MITRE • 09/25/2023
A flaw was found in codehaus-plexus. The org.codehaus.plexus.util.xml.XmlWriterUtil#writeComment fails to sanitize comments for a --> sequence. This issue means that text contained in the command string could be interpreted as XML and allow for XML injection.
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Analysis
by VulDB Data Team • 10/10/2024
The vulnerability identified as CVE-2022-4245 resides within the codehaus-plexus library, specifically within the org.codehaus.plexus.util.xml.XmlWriterUtil#writeComment method. This flaw represents a critical security oversight that directly impacts XML processing capabilities within applications relying on this library. The vulnerability stems from insufficient sanitization of comment content, creating a pathway for malicious actors to inject harmful XML sequences that can be interpreted by XML parsers. The issue manifests when developers pass user-controlled input directly into XML comment generation without proper validation or encoding, potentially allowing attackers to manipulate the XML structure in unintended ways.
The technical implementation of this vulnerability involves the failure to properly escape or sanitize the sequence "-->" within XML comments. When an attacker can control the content of XML comments and that content contains the sequence "-->", the XML parser may interpret this as the end of a comment, effectively breaking out of the comment context and potentially allowing XML injection attacks. This behavior aligns with CWE-94, which classifies the vulnerability as an insufficient input validation or sanitization issue within interpreted XML contexts. The flaw operates at the boundary between user input and XML generation, where the expectation is that all content will be properly escaped to prevent unintended XML parsing behavior.
From an operational standpoint, this vulnerability can have severe implications for applications that generate XML content dynamically, particularly those that process user input or external data sources. Attackers could exploit this weakness to inject malicious XML content, potentially leading to XML external entity (XXE) attacks, denial of service through malformed XML structures, or even data exfiltration if the XML processing includes access to sensitive resources. The impact extends beyond simple injection attacks as the vulnerability can be leveraged to manipulate XML documents in ways that may bypass security controls or cause unexpected behavior in XML parsers that handle the generated content. This type of vulnerability is particularly concerning in enterprise applications where XML processing is common and where security boundaries may be less strictly enforced.
The exploitation of CVE-2022-4245 aligns with several ATT&CK techniques including TA0001 (Initial Access) through malicious input injection and TA0002 (Execution) via XML injection that can lead to arbitrary code execution in vulnerable systems. Organizations should prioritize immediate remediation by updating to patched versions of the codehaus-plexus library or implementing proper input sanitization measures before any user-controlled data is processed through XML comment generation. Security teams should also consider implementing runtime monitoring to detect unusual XML comment patterns that may indicate exploitation attempts. The vulnerability demonstrates the importance of input validation at all layers of application processing and reinforces the need for comprehensive security testing that includes XML parsing and generation components. Additionally, defensive measures should include regular dependency audits to identify and remediate similar vulnerabilities across the software supply chain, as this flaw could potentially exist in other XML processing libraries that implement similar comment handling mechanisms.