CVE-2020-26256 Denial of service in fast-csv

2020-12-0821:45:19

CWE-400

GitHub_M

www.cve.org

cve-2020-26256

denial of service

fast-csv

npm package

redos vulnerability

regular expression denial of service

ignoreempty option

parsing

patch

codeql

empty_row_regexp

CVSS3

5.7

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.008

Percentile

81.8%

JSON

Fast-csv is an npm package for parsing and formatting CSVs or any other delimited value file in node. In fast-cvs before version 4.3.6 there is a possible ReDoS vulnerability (Regular Expression Denial of Service) when using ignoreEmpty option when parsing. This has been patched in v4.3.6 You will only be affected by this if you use the ignoreEmpty parsing option. If you do use this option it is recommended that you upgrade to the latest version v4.3.6 This vulnerability was found using a CodeQL query which identified EMPTY_ROW_REGEXP regular expression as vulnerable.

CNA Affected

[
  {
    "product": "fast-csv",
    "vendor": "C2FO",
    "versions": [
      {
        "status": "affected",
        "version": "< 4.3.6"
      }
    ]
  }
]