CVE-2021-41291

published 2021-09-30

CVE-2021-41291: ECOA BAS controller suffers from a path traversal content disclosure vulnerability. Using the GET parameter in File Manager, unauthenticated attackers can…

Priority P2 75 high 7.5 CVSS 3.1

AV N AC L PR N UI N S U C H I N A N

EXPLOIT

ECOA BAS controller suffers from a path traversal content disclosure vulnerability. Using the GET parameter in File Manager, unauthenticated attackers can remotely disclose directory content on the affected device.

Detection & IOCs extracted from sources · hover to see the quote

url /fmangersub?cpath=../../../../../../../etc/passwd↗

path /fmangersub

• → Look for GET requests to /fmangersub with a 'cpath' parameter containing directory traversal sequences (e.g., '../') — no authentication is required to exploit this endpoint. ↗
• → Successful exploitation returns /etc/passwd content; detect by matching the regex pattern 'root:.*:0:0:' in HTTP responses from the ECOA BAS controller.

• · The vulnerability is unauthenticated (PR:N), meaning no credentials or session tokens are needed — any network-accessible ECOA BAS controller is at risk. ↗
• · The traversal depth used in the PoC is 7 levels (../../../../../../..), but other depths may also succeed depending on the deployment path of the application.

CVSS provenance

nvd v3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

nvd v2.0 5.0 MEDIUM AV:N/AC:L/Au:N/C:P/I:N/A:N

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CWE-22