Actively exploited in the wild
Multiple DrayTek Vigor Routers Web Management Page Vulnerability
DrayTek - Multiple Vigor Routers · Listed in the CISA KEV since 2021-11-03. This indicates confirmed attacks in production environments.
Required action: Apply updates per vendor instructions.
CVE-2020-8515
CriticalCVSS 9.8KEVSummary
DrayTek Vigor2960 1.3.1_Beta, Vigor3900 1.4.4_Beta, and Vigor300B 1.3.3_Beta, 1.4.2.1_Beta, and 1.4.4_Beta devices allow remote code execution as root (without authentication) via shell metacharacters to the cgi-bin/mainfunction.cgi URI. This issue has been fixed in Vigor3900/2960/300B v1.5.1.
Risk Assessment
An attacker can remotely execute arbitrary commands as root without authentication, taking full control of the device and network.
Recommendation
Update DrayTek Vigor devices to version v1.5.1 or later to eliminate the vulnerability.
Other vulnerabilities in DrayTek Vigor
See all- CVE-2024-51138Critical
A stack-based buffer overflow vulnerability has been found in the URL parsing functionality of the TR069 STUN server in DrayTek Vigor routers. Insufficient bounds checking on URL parameters allows a remote attacker to execute arbitrary code with elevated privileges by sending a maliciously crafted request.
- CVE-2024-12987HighActively exploited
A critical vulnerability in DrayTek Vigor2960 and Vigor300B version 1.5.1.4 in the web management interface. Manipulation of the 'session' argument in /cgi-bin/mainfunction.cgi/apmcfgupload leads to OS command injection.
- CVE-2024-41340High
A vulnerability in Draytek Vigor devices allows attackers to upload crafted APP Enforcement modules, leading to arbitrary code execution. The issue affects multiple models before specific firmware versions.
- CVE-2024-41336High
Draytek Vigor devices store passwords in plaintext. This vulnerability affects multiple models and firmware versions.
- CVE-2024-41335High
Draytek Vigor devices use insecure strcmp and memcmp functions, enabling timing attacks. The vulnerability affects multiple models before specific firmware versions. Attackers can potentially obtain sensitive information by measuring response times.
- CVE-2024-41334High
Draytek Vigor devices do not verify certificates when downloading APPE modules, allowing attackers to upload crafted modules from non-official servers and achieve remote code execution.
Original NVD description (English source)
DrayTek Vigor2960 1.3.1_Beta, Vigor3900 1.4.4_Beta, and Vigor300B 1.3.3_Beta, 1.4.2.1_Beta, and 1.4.4_Beta devices allow remote code execution as root (without authentication) via shell metacharacters to the cgi-bin/mainfunction.cgi URI. This issue has been fixed in Vigor3900/2960/300B v1.5.1.