CVE-2021-45958

unknown

Published 2022-01-21 · Modified 2023-11-08

💬 Discuss on Community ✚ Propose mitigation

CVSS v3

—

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS v4 NEW

—

not yet in upstream

VIR risk

—

Description

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.

Predictions

Exploit likelihood

20%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

OS	Version	Status	Fixed in
sles		affected
debian	bookworm	fixed	`5.2.0-1`
debian	bullseye	affected
debian	forky	fixed	`5.2.0-1`
debian	sid	fixed	`5.2.0-1`
debian	trixie	fixed	`5.2.0-1`

Package impact

Ecosystem	Package	Vulnerable	Fixed
PyPI	ujson	`>=1.34,<5.2.0`	`5.2.0`
PyPI	ujson	`>=4.0.2,<5.1.0`	`5.1.0`

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.