CVE ID:	CVE-2023-45283
Description:	The filepath package does not recognize paths with a \??\ prefix as special. On Windows, a path beginning with \??\ is a Root Local Device path equivalent to a path beginning with \\?\. Paths with a \??\ prefix may be used to access arbitrary locations on the system. For example, the path \??\c:\x is equivalent to the more common path c:\x. Before fix, Clean could convert a rooted path such as \a\..\??\b into the root local device path \??\b. Clean will now convert this to .\??\b. Similarly, Join(\, ??, b) could convert a seemingly innocent sequence of path elements into the root local device path \??\b. Join will now convert this to \.\??\b. In addition, with fix, IsAbs now correctly reports paths beginning with \??\ as absolute, and VolumeName correctly reports the \??\ prefix as a volume name. UPDATE: Go 1.20.11 and Go 1.21.4 inadvertently changed the definition of the volume name in Windows paths starting with \?, resulting in filepath.Clean(\?\c:) returning \?\c: rather than \?\c:\ (among other effects). The previous behavior has been restored.
Test IDs:	1.3.6.1.4.1.25623.1.0.833554   1.3.6.1.4.1.25623.1.0.833509   1.3.6.1.4.1.25623.1.0.833664   1.3.6.1.4.1.25623.1.0.833466
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2023-45283 http://www.openwall.com/lists/oss-security/2023/12/05/2 http://www.openwall.com/lists/oss-security/2023/12/05/2 https://go.dev/cl/540277 https://go.dev/cl/540277 https://go.dev/cl/541175 https://go.dev/cl/541175 https://go.dev/issue/63713 https://go.dev/issue/63713 https://go.dev/issue/64028 https://go.dev/issue/64028 https://groups.google.com/g/golang-announce/c/4tU8LZfBFkY https://groups.google.com/g/golang-announce/c/4tU8LZfBFkY https://groups.google.com/g/golang-dev/c/6ypN5EjibjM/m/KmLVYH_uAgAJ https://groups.google.com/g/golang-dev/c/6ypN5EjibjM/m/KmLVYH_uAgAJ https://pkg.go.dev/vuln/GO-2023-2185 https://pkg.go.dev/vuln/GO-2023-2185