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CVE-2021-27292

Good to know:

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Date: March 17, 2021

ua-parser-js >= 0.7.14, fixed in 0.7.24, uses a regular expression which is vulnerable to denial of service. If an attacker sends a malicious User-Agent header, ua-parser-js will get stuck processing it for an extended period of time.

Language: JS

Severity Score

Related Resources (5)

https://github.com/pygments/pygments/commit/2e7e8c4a7b318f4032493773732754e418279a14
https://gist.github.com/b-c-ds/6941d80d6b4e694df4bc269493b7be76
https://nvd.nist.gov/vuln/detail/CVE-2021-27292
https://github.com/faisalman/ua-parser-js/commit/809439e20e273ce0d25c1d04e111dcf6011eb566
https://www.mend.io/vulnerability-database/CVE-2021-27292

Severity Score

Weakness Type (CWE)

Uncontrolled Resource Consumption ('Resource Exhaustion')

CWE-400

Top Fix

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Upgrade to version ua-parser-js - 0.7.24

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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