#VU65499 Improper input validation in json-smart - CVE-2021-31684

Vulnerability identifier: #VU65499

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-31684

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
json-smart
Universal components / Libraries / Software for developers

Vendor: netplex

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper input validation within indexOf() function of JSONParserByteArray. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

json-smart: 1.1 - 2.4.1

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External links
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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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.