Jann Horn discovered that the setuid-root mount.ecryptfs_private helper in the ecryptfs-utils would mount over any target directory that the user owns, including a directory in procfs. A local attacker could use this flaw to escalate his privileges.

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Debian Security Advisory DSA-3450-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
https://www.debian.org/security/                     Salvatore Bonaccorso
January 20, 2016                      https://www.debian.org/security/faq
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Package        : ecryptfs-utils
CVE ID         : CVE-2016-1572

Jann Horn discovered that the setuid-root mount.ecryptfs_private helper
in the ecryptfs-utils would mount over any target directory that the
user owns, including a directory in procfs. A local attacker could use
this flaw to escalate his privileges.

For the oldstable distribution (wheezy), this problem has been fixed
in version 99-1+deb7u1.

For the stable distribution (jessie), this problem has been fixed in
version 103-5+deb8u1.

We recommend that you upgrade your ecryptfs-utils packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

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