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Ubuntu Security Notice USN-6629-3
February 14, 2024

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

- Ubuntu 20.04 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:

USN-6629-1 fixed vulnerabilities in UltraJSON.
This update provides the corresponding updates for Ubuntu 20.04 LTS.

Original advisory 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 20.04 LTS (Available with Ubuntu Pro):
   python3-ujson                   1.35-4ubuntu0.1+esm1

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

References:
   https://ubuntu.com/security/notices/USN-6629-3
   https://ubuntu.com/security/notices/USN-6629-1
   CVE-2022-31116, CVE-2022-31117