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CVE-2021-21317

Published: 2021-02-16T18:15Z
Last Modified: 2024-11-21T05:48Z
Source: MITRE CVE List
License: MITRE-CVE-TOS
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. > MITRE Terms of Use apply – see LICENSE‑MITRE.txt