PT-2021-8209 · Draytek · Draytek Vigorconnect

Published 2021-10-12 · Updated 2021-10-19 · CVE-2021-20125

Positive Technologies (AI Summary)

CVSS v3.1

10

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 Draytek VigorConnect version 1.6.0-B3

Description A vulnerability exists in the file upload functionality of DownloadFileServlet, allowing an unauthenticated attacker to upload files to any location on the target operating system with root privileges. This issue is related to arbitrary file upload and directory traversal.

Recommendations For Draytek VigorConnect version 1.6.0-B3, consider disabling the file upload functionality of DownloadFileServlet until a patch is available to prevent exploitation. Restrict access to the DownloadFileServlet to minimize the risk of uploading malicious files. Avoid using the file upload feature in the affected version until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Unrestricted File Upload

Path traversal

Weakness Enumeration

CWE-434

CWE-22

Related Identifiers

BDU:2024-11436

CVE-2021-20125

Affected Products

Draytek Vigorconnect

References · 6

• 🔥 https://tenable.com/security/research/tra-2021-42 · Exploit
• https://bdu.fstec.ru/vul/2024-11436 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-20125 · Security Note
• https://osv.dev/vulnerability/CVE-2021-20125 · Vendor Advisory
• https://t.me/cibsecurity/30516 · Telegram Post
• https://draytek.co.uk/support/downloads/vigorconnect · Note