Description
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.
Published: 2021-02-16
Score: 5.3 Medium
EPSS: 1.5% Low
KEV: No
Impact: n/a
Action: n/a
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Advisories
Source ID Title
EUVD EUVD EUVD-2021-0561 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.
Github GHSA Github GHSA GHSA-p4pj-mg4r-x6v4 Denial of Service in uap-core
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Uap-core Project Uap-core
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2024-08-03T18:09:15.054Z

Reserved: 2020-12-22T00:00:00.000Z

Link: CVE-2021-21317

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-02-16T18:15:12.583

Modified: 2024-11-21T05:48:00.547

Link: CVE-2021-21317

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses