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CVE-2017-7907 : Vulnerability Insights and Analysis

Learn about CVE-2017-7907 affecting Schneider Electric Wonderware Historian Client 2014 R2 SP1 and earlier versions. Find out how attackers could exploit an XML parsing issue to cause denial of service or unauthorized data disclosure.

Schneider Electric Wonderware Historian Client 2014 R2 SP1 and earlier versions are affected by an XML parsing configuration issue that could lead to a denial of service or unauthorized disclosure of file contents.

Understanding CVE-2017-7907

This CVE involves a vulnerability in Schneider Electric Wonderware Historian Client related to XML parsing.

What is CVE-2017-7907?

The vulnerability in Schneider Electric Wonderware Historian Client arises from a poorly limited XML parser lacking proper restrictions for XML external entity reference (XXE). This flaw could be exploited by attackers to input malicious data through the application, potentially resulting in a denial of service or unauthorized disclosure of server or network file contents.

The Impact of CVE-2017-7907

The vulnerability could allow attackers to disrupt services or access sensitive information, posing a risk to the confidentiality and availability of systems.

Technical Details of CVE-2017-7907

Schneider Electric Wonderware Historian Client is susceptible to exploitation due to an improper XML parser configuration.

Vulnerability Description

The issue involves an improperly restricted XML parser that lacks proper restrictions for XML external entity reference (XXE), enabling attackers to input malicious data.

Affected Systems and Versions

        Product: Schneider Electric Wonderware Historian Client
        Versions: 2014 R2 SP1 and earlier

Exploitation Mechanism

Attackers can exploit the vulnerability by injecting malicious data through the application, potentially leading to denial of service or unauthorized disclosure of file contents.

Mitigation and Prevention

To address CVE-2017-7907, follow these steps:

Immediate Steps to Take

        Apply security patches provided by the vendor.
        Implement network segmentation to limit the impact of potential attacks.
        Monitor and restrict external access to vulnerable systems.

Long-Term Security Practices

        Regularly update and patch software to address known vulnerabilities.
        Conduct security assessments and penetration testing to identify and mitigate risks.
        Educate users and IT staff on secure coding practices and potential threats.

Patching and Updates

        Stay informed about security bulletins and advisories from Schneider Electric.
        Apply recommended patches and updates promptly to secure systems against known vulnerabilities.

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