mount.ecryptfs_private.c in eCryptfs-utils does not validate mount destination filesystem types, which allows local users to gain privileges by mounting over a nonstandard filesystem, as demonstrated by /proc/$pid.

- manpage ecryptfs-migrate-home.8: Fix typos - clang     static analysis fixes - Refuse to mount over     non-standard filesystems.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for ecryptfs-utils fixes the following issues :

  - CVE-2016-1572: A local user could have escalated     privileges by mounting over special filesystems     (bsc#962052)

This update for ecryptfs-utils fixes the following issues :

  - CVE-2016-1572: A local user could have escalated     privileges by mounting over special filesystems     (bsc#962052)

  - CVE-2014-9687: A default salt value reduced complexity     of offline precomputation attacks (bsc#920160) This     update was imported from the SUSE:SLE-12:Update update     project.

This update for ecryptfs-utils fixes the following issues :

  - CVE-2016-1572: A local user could have escalated     privileges by mounting over special filesystems     (bsc#962052)

  - CVE-2014-9687: A default salt value reduced complexity     of offline precomputation attacks (bsc#920160)

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Ubuntu 14.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-2876-1 advisory.

    Jann Horn discovered that mount.ecryptfs_private would mount over certain directories in the proc     filesystem. A local attacker could use this to escalate their privileges. (CVE-2016-1572)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

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.

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.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
89595	Fedora 23 : ecryptfs-utils-109-1.fc23 (2016-b02ad4e424)	Nessus	Fedora Local Security Checks	high
89568	Fedora 22 : ecryptfs-utils-109-1.fc22 (2016-7b9a2fe987)	Nessus	Fedora Local Security Checks	high
88546	openSUSE Security Update : ecryptfs-utils (openSUSE-2016-125)	Nessus	SuSE Local Security Checks	high
88544	openSUSE Security Update : ecryptfs-utils (openSUSE-2016-119)	Nessus	SuSE Local Security Checks	high
88508	SUSE SLED11 / SLES11 Security Update : ecryptfs-utils (SUSE-SU-2016:0290-1)	Nessus	SuSE Local Security Checks	high
88408	SUSE SLED12 / SLES12 Security Update : ecryptfs-utils (SUSE-SU-2016:0241-1)	Nessus	SuSE Local Security Checks	high
88166	openSUSE Security Update : ecryptfs-utils (openSUSE-2016-93)	Nessus	SuSE Local Security Checks	high
88040	Ubuntu 14.04 LTS : eCryptfs vulnerability (USN-2876-1)	Nessus	Ubuntu Local Security Checks	high
88024	Debian DSA-3450-1 : ecryptfs-utils - security update	Nessus	Debian Local Security Checks	high
88023	Debian DLA-397-1 : ecryptfs-utils security update	Nessus	Debian Local Security Checks	high

Detections

Analytics

CVE-2016-1572

high

Tenable Plugins

high

high

high

high

high

high

high

high

high

high