USN-4360-4: json-c vulnerability

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

Source: USN-4360-4: json-c vulnerability

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