CVE-2010-20121: EasyFTP Server versions up to 1.7.0.11 contain a stack-based buffer overflow vulnerability in the FTP command parser. When processing the CWD (Change Working…

PriorityP275critical9.8CVSS 3.1

AVNACLPRNUINSUCHIHAH

EXPLOIT

EPSS

3.03%

85.8th percentile

EasyFTP Server versions up to 1.7.0.11 contain a stack-based buffer overflow vulnerability in the FTP command parser. When processing the CWD (Change Working Directory) command, the server fails to properly validate the length of the input string, allowing attackers to overwrite memory on the stack. This flaw enables remote code execution without authentication, as EasyFTP allows anonymous access by default. The vulnerability was resolved in version 1.7.0.12, after which the product was renamed “UplusFtp.”

Affected

2 ranges

Vendor	Product	Version range	Fixed in
easyftp_server_project	easyftp_server	< 1.7.0.12	1.7.0.12
kmint21_software	easyftp_server	<= 1.7.0.11	—

Detection & IOCsextracted from sources · hover to see the quote

commandCWD↗

versionEasyFTP Server 1.7.0.11↗

→Anonymous/unauthenticated FTP sessions issuing CWD commands with abnormally long arguments should be flagged, as EasyFTP allows anonymous access by default and no credentials are required to exploit this vulnerability. ↗

·EasyFTP Server enables anonymous access by default, meaning no authentication is required to reach the vulnerable CWD code path. Disabling anonymous access is a partial mitigation but does not patch the underlying overflow. ↗

CVSS provenance

nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvdv4.09.3CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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