Xlight FTP Server 3.9.1 contains a structured exception handler (SEH) overwrite vulnerability that allows local attackers to crash the application and overwrite SEH pointers by supplying a crafted buffer string. Attackers can inject a 428-byte payload through the program execution field in virtual server configuration to trigger a buffer overflow that corrupts the SEH chain and enables potential code execution.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
References 4
https://www.exploit-db.com/exploits/46458
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/xlight-ftp-server-seh-overwrite-buffer-ove…
disclosure@vulncheck.com
https://www.xlightftpd.com/download/xlight.zip
disclosure@vulncheck.com
https://www.xlightftpd.com/index.htm
disclosure@vulncheck.com