PT-2020-12348 · Draytek · Vigor3900+2

Published 2020-03-26 · Updated 2025-05-05 · CVE-2020-10825

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 Draytek Vigor3900 versions prior to 1.5.1 Draytek Vigor2960 versions prior to 1.5.1 Draytek Vigor300B versions prior to 1.5.1

Description A stack-based buffer overflow occurs in the /cgi-bin/activate.cgi endpoint while base64 decoding the ticket parameter, allowing remote attackers to achieve code execution via a remote HTTP request.

Recommendations For Draytek Vigor3900 versions prior to 1.5.1, update to version 1.5.1 or later to resolve the issue. For Draytek Vigor2960 versions prior to 1.5.1, update to version 1.5.1 or later to resolve the issue. For Draytek Vigor300B versions prior to 1.5.1, update to version 1.5.1 or later to resolve the issue. As a temporary workaround, consider restricting access to the /cgi-bin/activate.cgi endpoint until a patch is available.

Exploit

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2020-10825

Affected Products

Vigor2960

Vigor300B

Vigor3900

References · 6

• 🔥 https://slashd.ga/2020/03/draytek-vulnerabilities · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2020-10825 · Security Note
• https://osv.dev/vulnerability/CVE-2020-10825 · Vendor Advisory
• https://t.me/cvenotify/2202 · Telegram Post
• https://t.me/cvenotify/120825 · Telegram Post
• https://draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-stack-based-buffer-overflow-vulnerability · Note