What’s Vulnerable › Vulnerabilities

CVE-2021-31684

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-06-01 · updated 2026-06-17
• Weakness: CWE-787

Description

A vulnerability was discovered in the indexOf function of JSONParserByteArray in JSON Smart versions 1.3 and 2.4 which causes a denial of service (DOS) via a crafted web request.

Affected products

• Json-Smart Project Json-Smart-V1: from 1.3 before 1.3.3 — fixed in 1.3.3
• Json-Smart Project Json-Smart-V2: from 2.4 before 2.4.4 — fixed in 2.4.4
• Oracle Corporation Utilities Framework: 4.4.0.0.0, 4.4.0.2.0, 4.4.0.3.0

How to fix

Upgrade to a fixed version: Json-Smart Project Json-Smart-V1 1.3.3; Json-Smart Project Json-Smart-V2 2.4.4. Check the vendor advisory for mitigations.

References

• https://github.com/netplex/json-smart-v1/issues/10
• https://github.com/netplex/json-smart-v1/pull/11
• https://github.com/netplex/json-smart-v2/issues/67
• https://github.com/netplex/json-smart-v2/pull/68
• https://lists.debian.org/debian-lts-announce/2023/03/msg00030.html
• https://security.netapp.com/advisory/ntap-20240621-0006/
• https://www.oracle.com/security-alerts/cpujan2022.html
• https://www.oracle.com/security-alerts/cpujul2022.html
• https://github.com/netplex/json-smart-v1/issues/10
• https://github.com/netplex/json-smart-v1/pull/11
• https://github.com/netplex/json-smart-v2/issues/67
• https://github.com/netplex/json-smart-v2/pull/68

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