CVE-2000-0569

Sygate - Denial of Service via Malformed DNS UDP Packet

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2000-0569. PoCs published by Marc of eEye.

AI-analyzed exploit summary This exploit sends a malformed UDP packet to port 53 of a Sygate gateway, causing a Denial of Service (DoS). The payload is a static string 'changeiscoming' sent to the target IP.

Description

Sybergen Sygate allows remote attackers to cause a denial of service by sending a malformed DNS UDP packet to its internal interface.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Marc of eEye · cdoswindows
https://www.exploit-db.com/exploits/20051

This exploit sends a malformed UDP packet to port 53 of a Sygate gateway, causing a Denial of Service (DoS). The payload is a static string 'changeiscoming' sent to the target IP.

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Sygate (version unspecified)
No auth needed
Prerequisites: Internal network access to the Sygate gateway · Target IP address
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/5049
Patch, Vendor Advisory vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/1420
Patch, Vendor Advisory mailing-list x_refsource_win2ksec
http://archives.neohapsis.com/archives/win2ksecadvice/2000-q2/0189.html

Scores

EPSS 0.0333
EPSS Percentile 87.1%

Details

Status published
Products (2)
sybergen/sygate 2.0
sybergen/sygate 3.11
Published Jun 30, 2000
Tracked Since Feb 18, 2026