Denial of service in json-smart

1) Improper input validation

EUVDB-ID: #VU65499

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 - Improper input validation

Exploit availability: No

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

CPE2.3

• cpe:2.3:a:netplex:json-smart:1.1:*:*:*:*:*:*:*
• cpe:2.3:a:netplex:json-smart:1.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:netplex:json-smart:1.2:*:*:*:*:*:*:*

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

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.