Denial of Service in uap-core

中 5.3CVE-2021-21317 · GHSA-p4pj-mg4r-x6v4 · 16/02/2021 公開 · 17/06/2026 更新

要点

CVE-2021-21317 は uap-core (uap-core project), uap-core に影響する深刻度「中」 (CVSS 5.3) の脆弱性です。
今後30日間に悪用される確率（EPSS）：2.5%（全脆弱性の 84.9% より高い）。
対処：0.11.0 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
uap-core uap-core_project	`< 0.11.0`	`0.11.0`
uap-core npm	`< 0.11.0`	`0.11.0`

概要

Impact

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.

Patches

Please update uap-core to >= v0.11.0

Downstream packages such as uap-python, uap-ruby etc which depend upon uap-core follow different version schemes.

NVD の説明

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.