Is CVE-2022-31116 in the CISA KEV catalog?

No. CVE-2022-31116 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-31116?

CVE-2022-31116 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2022-31116?

CVE-2022-31116 has an EPSS score of 2.28% (81th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-31116?

Upgrade ujson on debian 12 to 5.4.0-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2022-31116

HIGHEPSS 81th pctl

7.5

CVSS v3

NVD

Description

UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. Affected versions were found to improperly decode certain characters. JSON strings that contain escaped surrogate characters not part of a proper surrogate pair were decoded incorrectly. Besides corrupting strings, this allowed for potential key confusion and value overwriting in dictionaries. All users parsing JSON from untrusted sources are vulnerable. From version 5.4.0, UltraJSON decodes lone surrogates in the same way as the standard library's `json` module does, preserving them in the parsed output. Users are advised to upgrade. There are no known workarounds for this issue.

CWE-670

How to fix

Remediation Available

ujsonDebian

Fixed in:5.4.0-1CVE-2022-31116

python-ujsonUbuntu

Fixed in:1.33-1ubuntu0.1~esm2USN-6629-1

Fixed in:1.35-2ubuntu0.1~esm1USN-6629-1

python3-ujsonUbuntu

Fixed in:1.33-1ubuntu0.1~esm2USN-6629-1

Fixed in:1.35-2ubuntu0.1~esm1USN-6629-1

Fixed in:1.35-4ubuntu0.1+esm1USN-6629-3

Fixed in:5.1.0-1ubuntu0.1~esm1USN-6629-1

ujsonUbuntu

Fixed in:1.33-1ubuntu0.1~esm2USN-6629-1

Fixed in:1.35-2ubuntu0.1~esm1USN-6629-1

Fixed in:1.35-4ubuntu0.1+esm1USN-6629-3

Fixed in:5.1.0-1ubuntu0.1~esm1USN-6629-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

2.28%probability of exploitation in 30 days

81stpercentile

Elevated risk: more likely to be exploited than 81% of all known CVEs.

References

Patch1

github.com

Exploit1

github.com

Other references2

Related Vulnerabilities

Other CWE-670 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-9425	High	7.5	17%	-	Fix
CVE-2019-9946	High	7.5	3.1%	-	Fix
CVE-2024-32896	High	7.8	3.0%	KEV	-
CVE-2019-17192	Critical	9.8	2.7%	-	-
CVE-2026-38361	High	7.5	2.6%	-	-
CVE-2020-1914	Critical	9.8	2.5%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.