CVE-2021-43734: kkFileview v4.0.0 has arbitrary file read through a directory traversal vulnerability which may lead to sensitive file leak on related host.

PriorityP259high7.5CVSS 3.1

AVNACLPRNUINSUCHINAN

EXPLOIT

EPSS

10.73%

95.3th percentile

kkFileview v4.0.0 has arbitrary file read through a directory traversal vulnerability which may lead to sensitive file leak on related host.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
keking	kkfileview	—	—

Detection & IOCsextracted from sources · hover to see the quote

url/getCorsFile?urlPath=file:///etc/passwd↗

url/getCorsFile?urlPath=file:///c://windows/win.ini↗

path/getCorsFile↗

→Look for HTTP GET requests to /getCorsFile with a urlPath parameter containing a file:// URI scheme, indicating directory traversal / LFI exploitation attempts. ↗
→HTTP 200 responses from /getCorsFile containing 'root:.*:0:0:' (Linux /etc/passwd content) or 'for 16-bit app support' (Windows win.ini content) confirm successful exploitation. ↗
→Shodan/FOFA fingerprinting: identify exposed kkFileView instances via HTML body containing 'kkFileView' or 'kkfileview' as potential targets. ↗

·The vulnerability is confirmed only against kkFileView version 4.0.0 (CPE: cpe:2.3:a:keking:kkfileview:4.0.0). Versions 4.0.1 and later are reported as patched. ↗

CVSS provenance

nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:P/I:N/A:N

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