Incorrect Regular Expression in gjson - CVE-2021-42248
Published: June 30, 2022
Vulnerability identifier: #VU64823
CSH Severity: Medium
CVSS v4.0: 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-2021-42248
CWE-ID: CWE-185
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: tidwall
Affected software:
gjson
gjson
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient input validation when processing regular expressions. A remote attacker can pass specially crafted JSON input to the application and perform regular expression denial of service (ReDos) attack.
How to mitigate CVE-2021-42248
Install update from vendor's website.