Ubuntu: 2123-1: file vulnerabilities
Posted by Benjamin D. Thomas   
Ubuntu File could be made to crash if it processed a specially crafted file.
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Ubuntu Security Notice USN-2123-1
February 26, 2014

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

- Ubuntu 13.10
- Ubuntu 12.10
- Ubuntu 12.04 LTS
- Ubuntu 10.04 LTS

Summary:

File could be made to crash if it processed a specially crafted file.

Software Description:
- file: Tool to determine file types

Details:

It was discovered that file incorrectly handled Composite Document files.
An attacker could use this issue to cause file to crash, resulting in a
denial of service. This issue only affected Ubuntu 10.04 LTS and Ubuntu
12.04 LTS. (CVE-2012-1571)

Bernd Melchers discovered that file incorrectly handled indirect offset
values. An attacker could use this issue to cause file to consume resources
or crash, resulting in a denial of service. (CVE-2014-1943)

Update instructions:

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

Ubuntu 13.10:
  file                            5.11-2ubuntu4.1
  libmagic1                       5.11-2ubuntu4.1

Ubuntu 12.10:
  file                            5.11-2ubuntu0.1
  libmagic1                       5.11-2ubuntu0.1

Ubuntu 12.04 LTS:
  file                            5.09-2ubuntu0.2
  libmagic1                       5.09-2ubuntu0.2

Ubuntu 10.04 LTS:
  file                            5.03-5ubuntu1.1
  libmagic1                       5.03-5ubuntu1.1

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

References:
  http://www.ubuntu.com/usn/usn-2123-1
  CVE-2012-1571, CVE-2014-1943

Package Information:
  https://launchpad.net/ubuntu/+source/file/5.11-2ubuntu4.1
  https://launchpad.net/ubuntu/+source/file/5.11-2ubuntu0.1
  https://launchpad.net/ubuntu/+source/file/5.09-2ubuntu0.2
  https://launchpad.net/ubuntu/+source/file/5.03-5ubuntu1.1