CVE-2019-18213 Information

Description

XML Language Server (aka lsp4xml) before 0.9.1 as used in Red Hat XML Language Support (aka vscode-xml) before 0.9.1 for Visual Studio and other products allows XXE via a crafted XML document with resultant SSRF (as well as SMB connection initiation that can lead to NetNTLM challenge/response capture for password cracking). This occurs in extensions/contentmodel/participants/diagnostics/LSPXMLParserConfiguration.java.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

https://github.com/angelozerr/lsp4xml/ https://github.com/angelozerr/lsp4xml/blob/master/CHANGELOG.mdothers https://github.com/angelozerr/lsp4xml/pull/566 https://github.com/redhat-developer/vscode-xml/ https://marketplace.visualstudio.com/items?itemName=redhat.vscode-xml https://www.shielder.it/blog/dont-open-that-xml-xxe-to-rce-in-xml-plugins-for-vs-code-eclipse-theia/

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8