ecryptfs ecryptfs-utils 87 vulnerabilities and exploits

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utils/mount.ecryptfs_private.c in ecryptfs-utils prior to 90 does not properly check mountpoint permissions, which allows local users to effectively replace any directory with a new filesystem, and consequently gain privileges, via a mount system call.

utils/mount.ecryptfs_private.c in ecryptfs-utils prior to 90 does not properly maintain the mtab file during error conditions, which allows local users to cause a denial of service (table corruption) or bypass intended unmounting restrictions via a umount system call.

The encrypted private-directory setup process in utils/ecryptfs-setup-private in ecryptfs-utils prior to 90 does not properly ensure that the passphrase file is created, which might allow local users to bypass intended access restrictions at a certain time in the new-user creatio...

utils/ecryptfs-recover-private in ecryptfs-utils prior to 90 does not establish a subdirectory with safe permissions, which might allow local users to bypass intended access restrictions via standard filesystem operations during the recovery process.

When mount.ecrpytfs_private before version 87-0ubuntu1.2 calls setreuid() it doesn't also set the effective group id. So when it creates the new version, mtab.tmp, it's created with the group id of the user running mount.ecryptfs_private.

Mount.ecrpytfs Private Project Mount.ecrpytfs Private -

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