PT-2020-12346 · Draytek · Draytek Vigor300B+2

Published 2020-03-26 · Updated 2025-05-05 · CVE-2020-10823

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 in the "/cgi-bin/activate.cgi" endpoint through the var parameter allows 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. For Draytek Vigor2960 versions prior to 1.5.1, update to version 1.5.1 or later. For Draytek Vigor300B versions prior to 1.5.1, update to version 1.5.1 or later. As a temporary workaround, consider restricting access to the "/cgi-bin/activate.cgi" endpoint until a patch is available. Avoid using the var parameter in the affected endpoint until the issue is resolved.

Exploit

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2020-10823

Affected Products

Draytek Vigor2960

Draytek Vigor300B

Draytek Vigor3900

References · 7

• 🔥 https://slashd.ga/2020/03/draytek-vulnerabilities · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2020-10823 · Security Note
• https://osv.dev/vulnerability/CVE-2020-10823 · Vendor Advisory
• https://t.me/cvenotify/2200 · Telegram Post
• https://t.me/cvenotify/120823 · Telegram Post
• https://draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-stack-based-buffer-overflow-vulnerability · Note
• https://t.me/cibsecurity/10801 · Telegram Post