Debian Security Advisory DSA 2382-1 (ecryptfs-utils)

Published: 2012-02-11 08:26:49
CVE Author: NIST National Vulnerability Database (NVD)

CVSS Base Vector:
AV:N/AC:L/Au:N/C:P/I:P/A:P

Technical Details:
Several problems have been discovered in ecryptfs-utils, a cryptographic filesystem for Linux. CVE-2011-1831 Vasiliy Kulikov of Openwall and Dan Rosenberg discovered that eCryptfs incorrectly validated permissions on the requested mountpoint. A local attacker could use this flaw to mount to arbitrary locations, leading to privilege escalation. CVE-2011-1832 Vasiliy Kulikov of Openwall and Dan Rosenberg discovered that eCryptfs incorrectly validated permissions on the requested mountpoint. A local attacker could use this flaw to unmount to arbitrary locations, leading to a denial of service. CVE-2011-1834 Dan Rosenberg and Marc Deslauriers discovered that eCryptfs incorrectly handled modifications to the mtab file when an error occurs. A local attacker could use this flaw to corrupt the mtab file, and possibly unmount arbitrary locations, leading to a denial of service. CVE-2011-1835 Marc Deslauriers discovered that eCryptfs incorrectly handled keys when setting up an encrypted private directory. A local attacker could use this flaw to manipulate keys during creation of a new user. CVE-2011-1837 Vasiliy Kulikov of Openwall discovered that eCryptfs incorrectly handled lock counters. A local attacker could use this flaw to possibly overwrite arbitrary files. We acknowledge the work of the Ubuntu distribution in preparing patches suitable for near-direct inclusion in the Debian Linux Distribution Package. For the oldstable distribution (lenny), these problems have been fixed in version 68-1+lenny1. For the stable distribution (squeeze), these problems have been fixed in version 83-4+squeeze1. For the testing distribution (wheezy) and the unstable distribution (sid), these problems have been fixed in version 95-1.

Recommendations:
We recommend that you upgrade your ecryptfs-utils Linux Distribution Packages.

Summary:
The remote host is missing an update to ecryptfs-utils announced via advisory DSA 2382-1.

Detection Type:
Linux Distribution Package

Solution Type:
Vendor Patch

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2011-1831
https://nvd.nist.gov/vuln/detail/CVE-2011-1832
https://nvd.nist.gov/vuln/detail/CVE-2011-1834
https://nvd.nist.gov/vuln/detail/CVE-2011-1835
https://nvd.nist.gov/vuln/detail/CVE-2011-1837
https://nvd.nist.gov/vuln/detail/CVE-2011-3145

References:

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%202382-1

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Severity
High
CVSS Score
7.5

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