Debian 9819 Published by

A json-smart security update has been released for Debian GNU/Linux 10 LTS to address multiple vulnerabilities.

DLA 3373-1: json-smart security update

DLA-3373-1 json-smart -- LTS security update

Date Reported:
30 Mar 2023

Affected Packages:


Security database references:
In the Debian bugtracking system: Bug 1033474.
In Mitre's CVE dictionary: CVE-2021-31684, CVE-2023-1370.

More information:
Multiple vulnerabilities were found in Json-smart library. Json-smart is a performance focused, JSON processor lib written in Java.

A vulnerability was discovered in the indexOf function of JSONParserByteArray in JSON Smart versions 1.3 and 2.4 which causes a denial of service (DOS) via for instance a crafted web request.

A stack overflow was found due to excessive recursion. When reaching a ‘[‘ or ‘{‘ character in the JSON input, the code parses an array or an object respectively. It was discovered that the code does not have any limit to the nesting of such arrays or objects. Since the parsing of nested arrays and objects is done recursively, nesting too many of them can cause a stack exhaustion (stack overflow) and crash the software

For Debian 10 buster, these problems have been fixed in version 2.2-2+deb10u1.

We recommend that you upgrade your json-smart packages.

For the detailed security status of json-smart please refer to its security tracker page at:

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: