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UltraJSON vulnerable to Out-of-bounds Write

Moderate severity GitHub Reviewed Published Jan 21, 2022 to the GitHub Advisory Database • Updated Jan 30, 2023

Package

pip ujson (pip)

Affected versions

>= 1.34, < 5.2.0

Patched versions

5.2.0

Description

UltraJSON (aka ujson) 1.34 through 5.1.0 has a stack-based buffer overflow in Buffer_AppendIndentUnchecked (called from encode).

References

Published by the National Vulnerability Database Jan 1, 2022
Reviewed Jan 12, 2022
Published to the GitHub Advisory Database Jan 21, 2022
Last updated Jan 30, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS score

0.126%
(48th percentile)

Weaknesses

CVE ID

CVE-2021-45958

GHSA ID

GHSA-fh56-85cw-5pq6

Source code

Credits

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