Schneider Electric SoMachine Basic up to 1.6 XML Parser Parameter xml external entity reference

Summaryinfo

A vulnerability has been found in Schneider Electric SoMachine Basic up to 1.6 and classified as critical. This impacts an unknown function of the component XML Parser. The manipulation as part of Parameter leads to xml external entity reference. This vulnerability is referenced as CVE-2018-7783. Remote exploitation of the attack is possible. No exploit is available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Schneider Electric SoMachine Basic up to 1.6. This issue affects an unknown part of the component XML Parser. The manipulation as part of a Parameter leads to a xml external entity reference vulnerability. Using CWE to declare the problem leads to CWE-611. The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Schneider Electric SoMachine Basic prior to v1.6 SP1 suffers from an XML External Entity (XXE) vulnerability using the DTD parameter entities technique resulting in disclosure and retrieval of arbitrary data on the affected node via out-of-band (OOB) attack. The vulnerability is triggered when input passed to the xml parser is not sanitized while parsing the xml project/template file.

The bug was discovered 05/22/2018. The weakness was published 07/03/2018 (Website). The advisory is shared at schneider-electric.com. The identification of this vulnerability is CVE-2018-7783 since 03/08/2018. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 42 days. During that time the estimated underground price was around $0-$5k.

Applying the patch 1.6 SP1 is able to eliminate this problem.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• SCADA Software

Vendor

• Schneider Electric

Name

• SoMachine Basic

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6

License

• commercial

Website

• Vendor: https://www.schneider-electric.com/

CPE 2.3info

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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