PT-2021-19619 · Onlyoffice · Onlyoffice Document Server

Published 2021-01-22 · Updated 2022-04-15 · CVE-2021-3199

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: ONLYOFFICE Document Server versions prior to 5.6.3

Description: The issue allows directory traversal with remote code execution in the /upload endpoint of ONLYOFFICE Document Server when JWT is used. This can be achieved by including a /.. sequence in an image upload parameter, specifically in the image upload parameter.

Recommendations: For versions prior to 5.6.3, update to version 5.6.3 or later to resolve the issue. As a temporary workaround, consider restricting access to the /upload endpoint or disabling the use of JWT until the update can be applied. Avoid using the vulnerable image upload parameter in the /upload endpoint until the issue is resolved.

Exploit

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2021-3199

Affected Products

Onlyoffice Document Server

References · 5

• 🔥 https://github.com/moehw/poc_exploits/tree/master/CVE-2021-3199/poc_uploadImageFile.py · Exploit
• 🔥 https://github.com/nola-milkin/poc_exploits/blob/master/CVE-2021-3199/poc_uploadImageFile.py · Exploit
• https://osv.dev/vulnerability/CVE-2021-3199 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-3199 · Security Note
• https://github.com/ONLYOFFICE/DocumentServer/blob/903fe5ab7a275bd69c3c3346af2d21cf87ebeabf/CHANGELOG.md#563 · Note