CVE-2021-23354 Regular Expression Denial of Service (ReDoS)

2021-03-1215:10:16

snyk

www.cve.org

vulnerability regular expression dos

CVSS3

5.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

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

EPSS

0.002

Percentile

57.4%

JSON

The package printf before 0.6.1 are vulnerable to Regular Expression Denial of Service (ReDoS) via the regex string /%(?:(([\w_.]+))|([1-9]\d*)$)?([0 +-]*)(*|\d+)?(.)?(*|\d+)?[hlL]?([%bscdeEfFgGioOuxX])/g in lib/printf.js. The vulnerable regular expression has cubic worst-case time complexity.

CNA Affected

[
  {
    "product": "printf",
    "vendor": "n/a",
    "versions": [
      {
        "lessThan": "0.6.1",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]