N/A - USN-1196-1

Executive Summary

Summary
Title	eCryptfs vulnerability

Informations
Name	USN-1196-1	First vendor Publication	2011-08-23
Vendor	Ubuntu	Last vendor Modification	2011-08-23
Severity (Vendor)	N/A	Revision	N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score	NA
Base Score	NA	Environmental Score	NA
impact SubScore	NA	Temporal Score	NA
Exploitabality Sub Score	NA

Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score	Not Defined	Attack Range	Not Defined
Cvss Impact Score	Not Defined	Attack Complexity	Not Defined
Cvss Expoit Score	Not Defined	Authentication	Not Defined
Calculate full CVSS 2.0 Vectors scores

Detail

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 11.04 - Ubuntu 10.10 - Ubuntu 10.04 LTS

Summary:

An attacker could use eCryptfs to unmount arbitrary locations and cause a denial of service.

Software Description: - ecryptfs-utils: ecryptfs cryptographic filesystem (utilities)

Details:

It was discovered that eCryptfs incorrectly handled permissions when modifying the mtab file. A local attacker could use this flaw to manipulate the mtab file, and possibly unmount arbitrary locations, leading to a denial of service.

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 11.04:
ecryptfs-utils 87-0ubuntu1.2

Ubuntu 10.10:
ecryptfs-utils 83-0ubuntu3.2.10.10.2

Ubuntu 10.04 LTS:
ecryptfs-utils 83-0ubuntu3.2.10.04.2

In general, a standard system update will make all the necessary changes.

References:
http://www.ubuntu.com/usn/usn-1196-1
CVE-2011-3145

Package Information:
https://launchpad.net/ubuntu/+source/ecryptfs-utils/87-0ubuntu1.2
https://launchpad.net/ubuntu/+source/ecryptfs-utils/83-0ubuntu3.2.10.10.2
https://launchpad.net/ubuntu/+source/ecryptfs-utils/83-0ubuntu3.2.10.04.2