RealTerm Serial Terminal 2.0.0.70 contains a structured exception handling (SEH) buffer overflow vulnerability in the Echo Port tab that allows local attackers to execute arbitrary code by supplying a malicious payload. Attackers can craft a buffer overflow payload with a POP POP RET gadget chain and shellcode that triggers code execution when pasted into the Port field and the Change button is clicked.
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
Passive
Minimal interaction
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://realterm.sourceforge.io/
disclosure@vulncheck.com
https://sourceforge.net/projects/realterm/files/
disclosure@vulncheck.com
https://www.exploit-db.com/exploits/46441
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/realterm-serial-terminal-buffer-overflow-s…
disclosure@vulncheck.com