==========================================================================
Ubuntu Security Notice USN-4360-4
May 28, 2020
json-c vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 20.04 LTS
– Ubuntu 19.10
– Ubuntu 18.04 LTS
– Ubuntu 16.04 LTS
– Ubuntu 14.04 ESM
– Ubuntu 12.04 ESM
Summary:
json-c could be made to execute arbitrary code if it received
a specially crafted JSON file.
Software Description:
– json-c: JSON manipulation library
Details:
USN-4360-1 fixed a vulnerability in json-c. The security fix introduced a
memory leak that was reverted in USN-4360-2 and USN-4360-3. This update provides
the correct fix update for CVE-2020-12762.
Original advisory details:
It was discovered that json-c incorrectly handled certain JSON files.
An attacker could possibly use this issue to execute arbitrary code.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 20.04 LTS:
libjson-c4 0.13.1+dfsg-7ubuntu0.3
Ubuntu 19.10:
libjson-c4 0.13.1+dfsg-4ubuntu0.3
Ubuntu 18.04 LTS:
libjson-c3 0.12.1-1.3ubuntu0.3
Ubuntu 16.04 LTS:
libjson-c2 0.11-4ubuntu2.6
libjson0 0.11-4ubuntu2.6
Ubuntu 14.04 ESM:
libjson-c2 0.11-3ubuntu1.2+esm3
libjson0 0.11-3ubuntu1.2+esm3
Ubuntu 12.04 ESM:
libjson0 0.9-1ubuntu1.4
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/4360-4
https://usn.ubuntu.com/4360-1
CVE-2020-12762
Package Information:
https://launchpad.net/ubuntu/+source/json-c/0.13.1+dfsg-7ubuntu0.3
https://launchpad.net/ubuntu/+source/json-c/0.13.1+dfsg-4ubuntu0.3
https://launchpad.net/ubuntu/+source/json-c/0.12.1-1.3ubuntu0.3
https://launchpad.net/ubuntu/+source/json-c/0.11-4ubuntu2.6
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