CVE-2021-23346 Regular Expression Denial of Service (ReDoS)

2021-03-0416:55:21

snyk

www.cve.org

cve-2021-23346

redos

html-parse-stringify

vulnerability

regular expression

denial of service

CVSS3

4.8

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:P/RL:O/RC:R

AI Score

5.9

Confidence

High

EPSS

0.003

Percentile

69.6%

JSON

This affects the package html-parse-stringify before 2.0.1; all versions of package html-parse-stringify2. Sending certain input could cause one of the regular expressions that is used for parsing to backtrack, freezing the process.

CNA Affected

[
  {
    "product": "html-parse-stringify",
    "vendor": "n/a",
    "versions": [
      {
        "lessThan": "2.0.1",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  },
  {
    "product": "html-parse-stringify2",
    "vendor": "n/a",
    "versions": [
      {
        "lessThan": "unspecified",
        "status": "affected",
        "version": "0",
        "versionType": "custom"
      }
    ]
  }
]