==========================================================================
Ubuntu Security Notice USN-6629-1
February 14, 2024

ujson vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS (Available with Ubuntu Pro)
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)

Summary:

Several security issues were fixed in UltraJSON.

Software Description:
- ujson: ultra fast JSON encoder and decoder for Python 3

Details:

It was discovered that UltraJSON incorrectly handled certain input with
a large amount of indentation. An attacker could possibly use this issue
to crash the program, resulting in a denial of service. (CVE-2021-45958)

Jake Miller discovered that UltraJSON incorrectly decoded certain
characters. An attacker could possibly use this issue to cause key
confusion and overwrite values in dictionaries. (CVE-2022-31116)

It was discovered that UltraJSON incorrectly handled an error when
reallocating a buffer for string decoding. An attacker could possibly
use this issue to corrupt memory. (CVE-2022-31117)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.04 LTS (Available with Ubuntu Pro):
   python3-ujson                   5.1.0-1ubuntu0.1~esm1

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   python-ujson                    1.35-2ubuntu0.1~esm1
   python3-ujson                   1.35-2ubuntu0.1~esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
   python-ujson                    1.33-1ubuntu0.1~esm2
   python3-ujson                   1.33-1ubuntu0.1~esm2

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

References:
   https://ubuntu.com/security/notices/USN-6629-1
   CVE-2021-45958, CVE-2022-31116, CVE-2022-31117