CVE-2022-45397 in OSF Builder Suite XML Linter Plugin
Summary
by MITRE • 11/15/2022
Jenkins OSF Builder Suite : : XML Linter Plugin 1.0.2 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.
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Analysis
by VulDB Data Team • 12/19/2022
The vulnerability identified as CVE-2022-45397 affects the Jenkins OSF Builder Suite XML Linter Plugin version 1.0.2 and earlier, representing a critical security flaw that exposes systems to XML external entity attacks. This issue stems from insufficient configuration of the XML parser within the plugin, creating an avenue for malicious actors to exploit the system through carefully crafted XML input. The vulnerability specifically targets the plugin's handling of XML data processing, where the default XML parser configuration fails to disable external entity resolution, thereby allowing attackers to inject malicious entities that can be processed by the underlying system.
The technical implementation of this vulnerability falls under the category of XML external entity processing flaws, which aligns with CWE-611 and CWE-89 classifications within the Common Weakness Enumeration framework. When the XML Linter Plugin processes XML input without proper security configurations, it becomes susceptible to XXE attacks where attackers can leverage external entities to access local files, perform server-side request forgery attacks, or potentially execute arbitrary code on the affected system. The vulnerability is particularly concerning in Jenkins environments where the plugin might process untrusted XML data from various sources including user inputs, configuration files, or external services.
From an operational impact perspective, this vulnerability can enable attackers to extract sensitive information from the Jenkins server, including configuration files, credentials, and other system resources that might be accessible through the file system. The attack surface is expanded when considering that Jenkins servers often contain privileged information and access controls that could be compromised through successful XXE exploitation. Additionally, the vulnerability can facilitate further attacks such as internal network scanning or lateral movement within the infrastructure, as the compromised system might have access to other internal resources that would otherwise be protected by network segmentation.
The mitigation strategies for this vulnerability primarily focus on updating the affected plugin to a version that properly configures the XML parser to disable external entity resolution. Organizations should immediately upgrade to the latest version of the OSF Builder Suite XML Linter Plugin where the XXE protection mechanisms are properly implemented. Security configurations should also include implementing proper input validation and sanitization for all XML processing operations, ensuring that XML parsers are configured with secure defaults that prevent external entity resolution. Network segmentation and access controls should be reviewed to limit the potential impact of successful exploitation, while regular security assessments should be conducted to identify other potential XXE vulnerabilities in the Jenkins environment and related systems. The ATT&CK framework categorizes this vulnerability under T1213 (Data from Information Repositories) and T1071.004 (Application Layer Protocol: DNS) when exploited for information gathering and lateral movement purposes respectively.