CVE-2022-35923 Inefficient Regular Expression Complexity in v8n

2022-08-0220:10:11

CWE-400

GitHub_M

www.cve.org

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

0.001 Low

EPSS

Percentile

50.1%

JSON

v8n is a javascript validation library. Versions of v8n prior to 1.5.1 were found to have an inefficient regular expression complexity in the lowercase() and uppercase() regex which could lead to a denial of service attack. In testing of the lowercase() function a payload of ‘a’ + ‘a’.repeat(i) + ‘A’ with 32 leading characters took 29443 ms to execute. The same issue happens with uppercase(). Users are advised to upgrade. There are no known workarounds for this issue.

CNA Affected

[
  {
    "product": "v8n",
    "vendor": "imbrn",
    "versions": [
      {
        "status": "affected",
        "version": "< 1.5.1"
      }
    ]
  }
]