PT-2021-20530 · Eclipse · Eclipse Theia

David Dworken + 1 · Published 2021-09-02 · Updated 2021-09-14 · CVE-2021-34436

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions: Eclipse Theia versions 0.1.1 through 0.2.0

Description: The issue allows for remote code execution and XXE via the theia-xml-extension, which uses lsp4xml (recently renamed to LemMinX) for XML language support. This extension is installed by default.

Recommendations: For Eclipse Theia versions 0.1.1 through 0.2.0, consider disabling the theia-xml-extension as a temporary workaround until a patch is available. Restrict access to the LemMinX component to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

XXE

Path traversal

Weakness Enumeration

CWE-611

CWE-22

Related Identifiers

CVE-2021-34436

Affected Products

Eclipse Theia

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2021-34436 · Security Note
• https://bugs.eclipse.org/bugs/show_bug.cgi?id=563174 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-34436 · Vendor Advisory
• https://t.me/cibsecurity/28247 · Telegram Post