CVE Vulnerability

CVE-2021-21317

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.

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

5.3 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References
Link Resource
https://github.com/ua-parser/uap-core/security/advisories/GHSA-p4pj-mg4r-x6v4 Third Party Advisory
https://www.npmjs.com/package/uap-core Product Third Party Advisory
https://github.com/ua-parser/uap-core/commit/dc9925d458214cfe87b93e35346980612f6ae96c Patch Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:uap-core_project:uap-core:*:*:*:*:*:node.js:*:*
Information

Published : 2021-02-16 06:15

Updated : 2021-02-26 02:26

NVD link : CVE-2021-21317

Mitre link : CVE-2021-21317

Products Affected
No products.
CWE
CWE-1333

Inefficient Regular Expression Complexity