Microsoft Windows

Windows NT and Windows 2000 hosts allow a remote attacker to cause a denial of service via malformed DCE/RPC SMBwriteX requests that contain an invalid data length.

Memory leak in PPTP server in Windows NT 4.0 allows remote attackers to cause a denial of service via a malformed data packet, aka the "Malformed PPTP Packet Stream" vulnerability.

Microsoft Internet Explorer 6 SP2 and earlier allows remote attackers to cause a denial of service (crash) via certain malformed HTML, possibly involving applet and base tags without required arguments, which triggers a null pointer dereference in mshtml.dll.

Vulnerabilities in RPC servers in (1) Microsoft Exchange Server 2000 and earlier, (2) Microsoft SQL Server 2000 and earlier, (3) Windows NT 4.0, and (4) Windows 2000 allow remote attackers to cause a denial of service via malformed inputs.

Denial of service in Windows NT messenger service through a long username.

Windows NT 4.0 before SP3 allows remote attackers to bypass firewall restrictions or cause a denial of service (crash) by sending improperly fragmented IP packets without the first fragment, which the TCP/IP stack incorrectly reassembles into a valid session.

Remote attackers can perform a denial of service in Windows machines using malicious ARP packets, forcing a message box display for each packet or filling up log files.

Microsoft Internet Explorer 6.0 on Windows NT 4.0 SP6a, Windows 2000 SP4, Windows XP SP1, Windows XP SP2, and Windows Server 2003 SP1 allows remote attackers to cause a denial of service (client crash) via a certain combination of a malformed HTML file and a CSS file that triggers a null dereference, probably related to rendering of a DIV element that contains a malformed IMG tag, as demonstrated by IEcrash.htm and IEcrash.rar.

Two vulnerabilities in Microsoft Virtual Machine (VM) up to and including build 5.0.3805, as used in Internet Explorer and other applications, allow remote attackers to read files via a Java applet with a spoofed location in the CODEBASE parameter in the APPLET tag, possibly due to a parsing error.

Windows NT RRAS and RAS clients cache a user's password even if the user has not selected the "Save password" option.

NTMail does not disable the VRFY command, even if the administrator has explicitly disabled it.

Microsoft Virtual Machine (VM) build 5.0.3805 and earlier allows remote attackers to determine a local user's username via a Java applet that accesses the user.dir system property, aka "User.dir Exposure Vulnerability."

Denial of service in RAS/PPTP on NT systems.

LSA (LSASS.EXE) in Windows NT 4.0 allows remote attackers to cause a denial of service via a NULL policy handle in a call to (1) SamrOpenDomain, (2) SamrEnumDomainUsers, and (3) SamrQueryDomainInfo.

TCP/IP implementation in Microsoft Windows 95, Windows NT 4.0, and possibly others, allows remote attackers to reset connections by forcing a reset (RST) via a PSH ACK or other means, obtaining the target's last sequence number from the resulting packet, then spoofing a reset to the target.

Tcpip.sys in Windows NT 4.0 before SP4 allows remote attackers to cause a denial of service via an ICMP Subnet Mask Address Request packet, when certain multiple IP addresses are bound to the same network interface.

Windows 95, 98, and NT 4.0 allow remote attackers to cause a denial of service by spoofing ICMP redirect messages from a router, which causes Windows to change its routing tables.

The Windows NT RPC service allows remote attackers to conduct a denial of service using spoofed malformed RPC packets which generate an error message that is sent to the spoofed host, potentially setting up a loop, aka Snork.

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.

A later variation on the Teardrop IP denial of service attack, a.k.a. Teardrop-2.

The getCanonicalPath function in Windows NT 4.0 may free memory that it does not own and cause heap corruption, which allows attackers to cause a denial of service (crash) via requests that cause a long file name to be passed to getCanonicalPath, as demonstrated on the IBM JVM using a long string to the java.io.getCanonicalPath Java method.

Foxit Reader 2.0 allows remote attackers to cause a denial of service (application crash) via a crafted PDF document.

Buffer overflow in Microsoft command processor (CMD.EXE) for Windows NT and Windows 2000 allows a local user to cause a denial of service via a long environment variable, aka the "Malformed Environment Variable" vulnerability.

Web Extender Client (WEC) in Microsoft Office 2000, Windows 2000, and Windows Me does not properly process Internet Explorer security settings for NTLM authentication, which allows attackers to obtain NTLM credentials and possibly obtain the password, aka the "Web Client NTLM Authentication" vulnerability.

Format string vulnerability in the C runtime functions in SQL Server 7.0 and 2000 allows attackers to cause a denial of service.

Windows NT with SYSKEY reuses the keystream that is used for encrypting SAM password hashes, allowing an attacker to crack passwords.

Unknown vulnerability in the Certificate Enrollment ActiveX Control in Microsoft Windows 98, Windows 98 Second Edition, Windows Millennium, Windows NT 4.0, Windows 2000, and Windows XP allow remote attackers to delete digital certificates on a user's system via HTML.

A Windows NT account policy has inappropriate, security-critical settings for lockout, e.g. lockout duration, lockout after bad logon attempts, etc.

The default configuration of ColdFusion MX has the "Enable Robust Exception Information" option selected, which allows remote attackers to obtain the full path of the web server via a direct request to CFIDE/probe.cfm, which leaks the path in an error message.

Denial of service in Windows NT DNS servers by flooding port 53 with too many characters.

Bonk variation of teardrop IP fragmentation denial of service.

Denial of service through Winpopup using large user names.

Windows NT crashes or locks up when a Samba client executes a "cd .." command on a file share.

Denial of service in Windows NT DNS servers through malicious packet which contains a response to a query that wasn't made.

Netbt.sys in Windows NT 4.0 allows remote malicious DNS servers to cause a denial of service (crash) by returning 0.0.0.0 as the IP address for a DNS host name lookup.

Access violation in LSASS.EXE (LSA/LSARPC) program in Windows NT allows a denial of service.

Denial of service in RPCSS.EXE program (RPC Locator) in Windows NT.

Ingres 2.5 and 2.6 on Windows, as used in multiple CA products and possibly other products, assigns the privileges and identity of users to be the same as the first user, which allows remote attackers to gain privileges.

The IMAP4 service in MERCUR Messaging 2005 before Service Pack 4 allows remote attackers to cause a denial of service (crash) via a message with a long subject field.

WebSite Pro 3.1.11.0 on Windows allows remote attackers to read script source code for files with extensions greater than 3 characters via a URL request that uses the equivalent 8.3 file name.