[arch-security] [ASA-201601-25] ecryptfs-utils: privilege escalation
anthraxx at archlinux.org
Mon Jan 25 13:04:20 UTC 2016
Arch Linux Security Advisory ASA-201601-25
Date : 2016-01-25
CVE-ID : CVE-2016-1572
Package : ecryptfs-utils
Type : privilege escalation
Remote : Yes
Link : https://wiki.archlinux.org/index.php/CVE
The package ecryptfs-utils before version 108-2 is vulnerable to
Upgrade to 108-2.
# pacman -Syu "ecryptfs-utils>=108-2"
The problem has been fixed upstream and the patch has been applied.
An unprivileged user can mount an ecryptfs over /proc/$pid because
according to stat(), it is a normal directory and owned by the user.
However, the user is not actually permitted to create arbitrary
directory entries in /proc/$pid, and ecryptfs' behavior might be
enabling privilege escalation attacks with the help of other programs
that use procfs.
A remote attacker is able to elevate the privileges and gain
unauthorized root access.
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