Microsoft » Windows 2000 : Security Vulnerabilities, CVEs, (Gain Privilege) CVSS score >= 5

The Secure Channel (aka SChannel) authentication component in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP1 and SP2, Vista Gold and SP1, and Server 2008, when certificate authentication is used, does not properly validate the client's key exchange data in Transport Layer Security (TLS) handshake messages, which allows remote attackers to spoof authentication by crafting a TLS packet based on knowledge of the certificate but not the private key, aka "SChannel Spoofing Vulnerability."

Microsoft Windows 2000 Gold through SP4, XP Gold through SP3, Server 2003 SP1 and SP2, Vista Gold and SP1, and Server 2008 allows remote SMB servers to execute arbitrary code on a client machine by replaying the NTLM credentials of a client user, as demonstrated by backrush, aka "SMB Credential Reflection Vulnerability." NOTE: some reliable sources report that this vulnerability exists because of an insufficient fix for CVE-2000-0834.

The Graphics Rendering Engine in Microsoft Windows 2000 SP4 and XP SP2 allows local users to gain privileges via "invalid application window sizes" in layered application windows, aka the "GDI Invalid Window Size Elevation of Privilege Vulnerability."

Untrusted search path vulnerability in Winlogon in Microsoft Windows 2000 SP4, when SafeDllSearchMode is disabled, allows local users to gain privileges via a malicious DLL in the UserProfile directory, aka "User Profile Elevation of Privilege Vulnerability."

The Server Message Block (SMB) driver (MRXSMB.SYS) in Microsoft Windows 2000 SP4, XP SP1 and SP2, and Server 2003 SP1 and earlier allows local users to execute arbitrary code by calling the MrxSmbCscIoctlOpenForCopyChunk function with the METHOD_NEITHER method flag and an arbitrary address, possibly for kernel memory, aka the "SMB Driver Elevation of Privilege Vulnerability."