high
7.5
CWE
400
Advisory Published
CVE Published
Updated

CVE-2021-27292

First published: Thu Feb 11 2021(Updated: )

A regular expression denial of service (ReDoS) vulnerability was found in the npm library `ua-parser-js`. If a supplied user agent matches the `Noble` string and contains many spaces then the regex will conduct backtracking, taking an ever increasing amount of time depending on the number of spaces supplied. An attacker can use this vulnerability to potentially craft a malicious user agent resulting in a denial of service.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Ua-parser-js Project Ua-parser-js>=0.7.14<0.7.24

Remedy

https://github.com/faisalman/ua-parser-js/commit/809439e20e273ce0d25c1d04e111dcf6011eb566

Remedy

https://github.com/pygments/pygments/commit/2e7e8c4a7b318f4032493773732754e418279a14

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Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2021-27292?

    CVE-2021-27292 is a regular expression denial of service (ReDoS) vulnerability in the npm library `ua-parser-js`.

  • How does CVE-2021-27292 impact me?

    If you are using the affected version of `ua-parser-js` and a user agent matches the `Noble` string and contains many spaces, the regular expression may take an increasingly long time to process, leading to a potential denial of service.

  • What is the severity of CVE-2021-27292?

    CVE-2021-27292 has a severity rating of 7.5, indicating a high severity.

  • How can I fix CVE-2021-27292?

    To fix CVE-2021-27292, update `ua-parser-js` to version 0.7.24 or higher.

  • Where can I find more information about CVE-2021-27292?

    You can find more information about CVE-2021-27292 at the following references: [GitHub Commit](https://github.com/faisalman/ua-parser-js/commit/809439e20e273ce0d25c1d04e111dcf6011eb566), [Red Hat Solution](https://access.redhat.com/solutions/5707561)

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