Missing access checks on reparse point

Description Starting with Samba 4.21, users can create and delete NTFS-style reparse points https://en.wikipedia.org/wiki/NTFSreparsepoint via the SMB protocol. The Reparse Point Metadata is stored in an extended attribute named "user.SmbReparse" together with the FILEATTRIBUTEREPARSEPOINT bit in...

Negative idmap cache entries can cause incorrect

Description The Samba smbd file server must map Windows group identities SIDs into unix group ids gids. The code that performs this had a flaw that could allow it to read data beyond the end of the array in the case where a negative cache entry had been added to the mapping cache. This could caus...