json-c vulnerability

28 May 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

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

• USN-4360-1
• CVE-2020-12762