Executive Summary

This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Title json-c vulnerability
Name USN-4360-1 First vendor Publication 2020-05-14
Vendor Ubuntu Last vendor Modification 2020-05-14
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Overall CVSS Score 7.8
Base Score 7.8 Environmental Score 7.8
impact SubScore 5.9 Temporal Score 7.8
Exploitabality Sub Score 1.8
Attack Vector Local Attack Complexity Low
Privileges Required None User Interaction Required
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:P/I:P/A:P)
Cvss Base Score 6.8 Attack Range Network
Cvss Impact Score 6.4 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores


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


json-c could be made to execute arbitrary code if it received a specially crafted JSON file.

Software Description: - json-c: JSON manipulation library


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-7ubuntu0.1

Ubuntu 19.10:
libjson-c4 0.13.1+dfsg-4ubuntu0.1

Ubuntu 18.04 LTS:
libjson-c3 0.12.1-1.3ubuntu0.1

Ubuntu 16.04 LTS:
libjson-c2 0.11-4ubuntu2.1
libjson0 0.11-4ubuntu2.1

Ubuntu 14.04 ESM:
libjson-c2 0.11-3ubuntu1.2+esm1
libjson0 0.11-3ubuntu1.2+esm1

Ubuntu 12.04 ESM:
libjson0 0.9-1ubuntu1.2

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


Package Information:

Original Source

Url : http://www.ubuntu.com/usn/USN-4360-1

CWE : Common Weakness Enumeration

% Id Name
50 % CWE-787 Out-of-bounds Write (CWE/SANS Top 25)
50 % CWE-190 Integer Overflow or Wraparound (CWE/SANS Top 25)

CPE : Common Platform Enumeration

Application 10

Alert History

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Date Informations
2020-05-23 13:03:46
  • Multiple Updates
2020-05-15 00:17:46
  • First insertion