CVE-2000-1227
MediumExploitation Probability (EPSS)
Very high risk96th percentile - higher than 96% of all known CVEs
Summary
Windows NT 4.0 and Windows 2000 hosts allow remote attackers to cause a denial of service (unavailable connections) by sending multiple SMB SMBnegprots requests but not reading the response that is sent back.
Risk Assessment
An attacker can remotely exhaust server resources, preventing new connections from being established. This can disrupt access to network services and files.
Recommendation
Apply Windows updates that fix this vulnerability, or restrict access to SMB ports via firewall. Monitor for unusual SMB requests.
Other vulnerabilities in Windows NT 4.0
See all- CVE-1999-1579Medium
The Cenroll ActiveX control (xenroll.dll) for Terminal Server Editions of Windows NT 4.0 and Windows NT Server 4.0 before SP6 allows remote attackers to cause a denial of service (resource consumption) by creating a large number of arbitrary files on the target machine.
- CVE-1999-1132Medium
Windows NT 4.0 allows remote attackers to cause a denial of service (crash) via extra source routing data such as a Routing Information Field (RIF) field with a hop count greater than 7 or a list containing duplicate Token Ring IDs.
- CVE-1999-1127High
Windows NT 4.0 does not properly shut down invalid named pipe RPC connections, allowing remote attackers to cause a denial of service (resource exhaustion) via a series of connections containing malformed data.
- CVE-1999-1452Low
GINA in Windows NT 4.0 allows attackers with physical access to display a portion of the clipboard of the user who has locked the workstation by pasting (CTRL-V) the contents into the username prompt.
- CVE-1999-0994Medium
Windows NT with SYSKEY reuses the keystream used for encrypting SAM password hashes, allowing an attacker to crack passwords.
- CVE-1999-0987High
Windows NT improperly downloads a system policy if the domain user logs into the domain with a space at the end of the domain name.
- CVE-1999-1234Medium
LSA (LSASS.EXE) in Windows NT 4.0 allows remote attackers to cause a denial of service via a NULL policy handle in calls to SamrOpenDomain, SamrEnumDomainUsers, and SamrQueryDomainInfo.
- CVE-2000-0328Medium
Windows NT 4.0 generates predictable random TCP initial sequence numbers (ISN), allowing remote attackers to perform spoofing and session hijacking.
- CVE-1999-0728High
A Windows NT user can disable the keyboard or mouse by directly calling the IOCTLs which control them.
- CVE-1999-0726High
An attacker can conduct a denial of service in Windows NT by executing a program with a malformed file image header.
Original NVD description (English source)
Windows NT 4.0 and Windows 2000 hosts allow remote attackers to cause a denial of service (unavailable connections) by sending multiple SMB SMBnegprots requests but not reading the response that is sent back.