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CVE-2021-45958

Published: 1 January 2022

UltraJSON (aka ujson) through 5.1.0 has a stack-based buffer overflow in Buffer_AppendIndentUnchecked (called from encode). Exploitation can, for example, use a large amount of indentation.

Notes

AuthorNote
ccdm94
the embedded ujson code in pandas, eventhough containing similar
content as the upstream ujson code, seems to have diverged from the
ujson upstream project (they have fully forked ujson), since pandas
upstream is maintaining their own ujson bug fixes and changes without
re-syncing with the ujson upstream project. There is no indication
the ujson fork, as used in pandas, is vulnerable to the same issues
as the upstream ujson code.

Priority

Medium

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package Release Status
pandas
Launchpad, Ubuntu, Debian
bionic Needs triage

focal Needs triage

hirsute Ignored
(end of life)
impish Ignored
(end of life)
jammy Needs triage

kinetic Ignored
(end of life, was needs-triage)
lunar Ignored
(end of life, was needs-triage)
mantic Needs triage

trusty Needs triage

upstream Needed

xenial Needs triage

ujson
Launchpad, Ubuntu, Debian
bionic
Released (1.35-2ubuntu0.1~esm1)
Available with Ubuntu Pro
focal
Released (1.35-4ubuntu0.1)
hirsute Ignored
(end of life)
impish Ignored
(end of life)
jammy
Released (5.1.0-1ubuntu0.1~esm1)
Available with Ubuntu Pro
kinetic Ignored
(end of life, was needs-triage)
lunar Not vulnerable
(5.4.0-1)
mantic Not vulnerable
(5.4.0-1)
trusty Ignored
(end of standard support)
upstream
Released (5.2.0)
xenial
Released (1.33-1ubuntu0.1~esm2)
Available with Ubuntu Pro
Patches:
upstream: https://github.com/ultrajson/ultrajson/pull/519

Severity score breakdown

Parameter Value
Base score 5.5
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H