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[email protected]CVE-2021-21317

HistoryFeb 16, 2021 - 6:15 p.m.

CVE-2021-21317

2021-02-1618:15:12

CWE-400

CWE-1333

[email protected]

web.nvd.nist.gov

cve-2021-21317

uap-core

npm package

denial of service

vulnerability

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

5.3 Medium

CVSS3

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

5.1 Medium

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

71.2%

JSON

uap-core in an open-source npm package which contains the core of BrowserScope’s original user agent string parser. In uap-core before version 0.11.0, some regexes are vulnerable to regular expression denial of service (REDoS) due to overlapping capture groups. This allows remote attackers to overload a server by setting the User-Agent header in an HTTP(S) request to maliciously crafted long strings. This is fixed in version 0.11.0. Downstream packages such as uap-python, uap-ruby etc which depend upon uap-core follow different version schemes.

Affected configurations

Vulners

NVD

Node

ua-parseruap_coreRange<0.11.0

CPENameOperatorVersion
uap-core_project:uap-coreuap-core project uap-corelt0.11.0

CPE	Name	Operator	Version
uap-core_project:uap-core	uap-core project uap-core	lt	0.11.0

CNA Affected

[
  {
    "product": "uap-core",
    "vendor": "ua-parser",
    "versions": [
      {
        "status": "affected",
        "version": "< 0.11.0"
      }
    ]
  }
]