Vulnerability of json-c: memory corruption

Synthesis of the vulnerability

An attacker can trigger a memory corruption of json-c, in order to trigger a denial of service, and possibly to run code.

Impacted products: Debian, WebSphere MQ, Solaris, pfSense, Ubuntu.

Severity of this bulletin: 2/4.

Creation date: 15/05/2020.

Références of this threat: 6382922, CVE-2020-12762, DLA-2228-1, DLA-2228-2, DLA-2301-1, DSA-4741-1, USN-4360-1, USN-4360-2, USN-4360-3, USN-4360-4, VIGILANCE-VUL-32277.

Description of the vulnerability

An attacker can trigger a memory corruption of json-c, in order to trigger a denial of service, and possibly to run code.
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This computer threat note impacts software or systems such as Debian, WebSphere MQ, Solaris, pfSense, Ubuntu.

Our Vigil@nce team determined that the severity of this weakness alert is medium.

The trust level is of type confirmed by the editor, with an origin of document.

An attacker with a expert ability can exploit this computer weakness note.

Solutions for this threat

Debian 10: new json-c packages.
New packages are available:
Debian 10: json-c 0.12.1+ds-2+deb10u

Debian 8: new json-c packages.
New packages are available:
Debian 8: json-c 0.11-4+deb8u2

Debian 9: new json-c packages.
New packages are available:
Debian 9: json-c 0.12.1-1.1+deb9u1

IBM MQ: fixed versions for json-c.
Fixed versions are indicated in information sources.

Oracle Solaris: patch for third party software of July 2020 v1.
A patch is available:
https://support.oracle.com/rs?type=doc&id=1448883.1

pfSense: version 2.4.5-p1.
The version 2.4.5-p1 is fixed:
https://www.pfsense.org/download/
https://www.netgate.com/

Ubuntu: new json-c packages.
New packages are available:
  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

Wind River Linux: version 10.18.44.17.
The version 10.18.44.17 is fixed:
https://support2.windriver.com/

Wind River Linux: version 10.19.45.8.
The version 10.19.45.8 is fixed.
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