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Ubuntu Security Notice USN-2245-1
June 12, 2014

json-c vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.04 LTS
- Ubuntu 13.10
- Ubuntu 12.04 LTS

Summary:

json-c could be made to crash or consume CPU if it processed a specially
crafted JSON document.

Software Description:
- json-c: JSON manipulation library

Details:

Florian Weimer discovered that json-c incorrectly handled buffer lengths.
An attacker could use this issue with a specially-crafted large JSON
document to cause json-c to crash, resulting in a denial of service.
(CVE-2013-6370)

Florian Weimer discovered that json-c incorrectly handled hash arrays. An
attacker could use this issue with a specially-crafted JSON document to
cause json-c to consume CPU resources, resulting in a denial of service.
(CVE-2013-6371)

Update instructions:

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

Ubuntu 14.04 LTS:
  libjson0                        0.11-3ubuntu1.2

Ubuntu 13.10:
  libjson0                        0.11-2ubuntu1.2

Ubuntu 12.04 LTS:
  libjson0                        0.9-1ubuntu1.1

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

References:
  http://www.ubuntu.com/usn/usn-2245-1
  CVE-2013-6370, CVE-2013-6371

Package Information:
  https://launchpad.net/ubuntu/+source/json-c/0.11-3ubuntu1.2
  https://launchpad.net/ubuntu/+source/json-c/0.11-2ubuntu1.2
  https://launchpad.net/ubuntu/+source/json-c/0.9-1ubuntu1.1