1. Ubuntu Security Notices
  2. USN-1196-1

USN-1196-1: eCryptfs vulnerability

Publication date

23 August 2011

Overview

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

Releases

Packages

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.

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

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
11.04 natty ecryptfs-utils –  87-0ubuntu1.2
10.10 maverick ecryptfs-utils –  83-0ubuntu3.2.10.10.2
10.04 lucid ecryptfs-utils –  83-0ubuntu3.2.10.04.2

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References

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