VulnerabilityAnalyzed
CVE-2020-8515
Multiple DrayTek Vigor Routers Web Management Page Vulnerability
KEVCRITICAL 9.8EPSS 100.0%
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 3 May 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 99.99% probability · 100th percentile
- CISA KEV
- Listed 3 November 2021 · due 3 May 2022
- Weakness
- CWE-78
- Affected
- draytek/vigor2960 firmware · draytek/vigor300b firmware · draytek/vigor3900 firmware
- Source
- cve@mitre.org
CISA notes
Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2020-8515
References
- http://packetstormsecurity.com/files/156979/DrayTek-Vigor2960-Vigor3900-Vigor300B-Remote-Command-Execution.htmlExploit, Third Party Advisory, VDB Entry
- https://sku11army.blogspot.com/2020/01/draytek-unauthenticated-rce-in-draytek.htmlPermissions Required, Third Party Advisory
- https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-router-web-management-page-vulnerability-%28cve-2020-8515%29/Vendor Advisory
- http://packetstormsecurity.com/files/156979/DrayTek-Vigor2960-Vigor3900-Vigor300B-Remote-Command-Execution.htmlExploit, Third Party Advisory, VDB Entry
- https://sku11army.blogspot.com/2020/01/draytek-unauthenticated-rce-in-draytek.htmlPermissions Required, Third Party Advisory
- https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-router-web-management-page-vulnerability-%28cve-2020-8515%29/Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-8515US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.