CVE-2017-6416

CRITICAL

SysGauge 1.5.18 - Buffer Overflow via SMTP Service Ready String

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2017-6416. PoCs published by Peter Baris, Chris Higgins, Peter Baris, including Metasploit module exploits/windows/smtp/sysgauge_client_bof.

AI-analyzed exploit summary This exploit demonstrates a buffer overflow in SysGauge 1.5.18's SMTP connection verification function, leading to remote code execution via a crafted SMTP response. The payload is split into two parts to bypass size constraints and uses a reverse Meterpreter shell.

Description

An issue was discovered in SysGauge 1.5.18. A buffer overflow vulnerability in SMTP connection verification leads to arbitrary code execution. The attack vector is a crafted SMTP daemon that sends a long 220 (aka "Service ready") string.

Exploits (2)

exploitdb WORKING POC VERIFIED
by Peter Baris · pythonremotewindows
https://www.exploit-db.com/exploits/41479

This exploit demonstrates a buffer overflow in SysGauge 1.5.18's SMTP connection verification function, leading to remote code execution via a crafted SMTP response. The payload is split into two parts to bypass size constraints and uses a reverse Meterpreter shell.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: SysGauge 1.5.18
No auth needed
Prerequisites: Network access to the target's SMTP port (25) · Target running SysGauge 1.5.18
devstral-2 · analyzed Feb 18, 2026 Full analysis →
metasploit WORKING POC NORMAL
by Chris Higgins, Peter Baris · rubypocwin
https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/smtp/sysgauge_client_bof.rb

This Metasploit module exploits a buffer overflow vulnerability in SysGauge 1.5.18 via SMTP server validation. It sends a malicious 220 response to trigger the overflow, resulting in an unprivileged shell.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: SysGauge 1.5.18
No auth needed
Prerequisites: Network access to the target · SysGauge client configured to validate SMTP server
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (2)

Core 2
Core References
Exploit, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/41479/
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/96568

Scores

CVSS v3 9.8
EPSS 0.1077
EPSS Percentile 95.3%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-119
Status published
Products (1)
flexense/sysgauge 1.5.18
Published Mar 06, 2017
Tracked Since Feb 18, 2026