Vulnerability Details CVE-2021-21317
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.015
EPSS Ranking 79.9%
CVSS Severity
CVSS v3 Score 5.3
CVSS v2 Score 5.0
References
- https://github.com/ua-parser/uap-core/commit/dc9925d458214cfe87b93e35346980612f6ae96c
- https://github.com/ua-parser/uap-core/security/advisories/GHSA-p4pj-mg4r-x6v4
- https://www.npmjs.com/package/uap-core
- https://github.com/ua-parser/uap-core/commit/dc9925d458214cfe87b93e35346980612f6ae96c
- https://github.com/ua-parser/uap-core/security/advisories/GHSA-p4pj-mg4r-x6v4
- https://www.npmjs.com/package/uap-core
Products affected by CVE-2021-21317
-
cpe:2.3:a:uap-core_project:uap-core:0.1.0
-
cpe:2.3:a:uap-core_project:uap-core:0.1.1
-
cpe:2.3:a:uap-core_project:uap-core:0.1.2
-
cpe:2.3:a:uap-core_project:uap-core:0.10.0
-
cpe:2.3:a:uap-core_project:uap-core:0.2.0
-
cpe:2.3:a:uap-core_project:uap-core:0.2.1
-
cpe:2.3:a:uap-core_project:uap-core:0.2.2
-
cpe:2.3:a:uap-core_project:uap-core:0.2.3
-
cpe:2.3:a:uap-core_project:uap-core:0.2.4
-
cpe:2.3:a:uap-core_project:uap-core:0.3.0
-
cpe:2.3:a:uap-core_project:uap-core:0.3.1
-
cpe:2.3:a:uap-core_project:uap-core:0.3.2
-
cpe:2.3:a:uap-core_project:uap-core:0.3.4
-
cpe:2.3:a:uap-core_project:uap-core:0.4.0
-
cpe:2.3:a:uap-core_project:uap-core:0.5.0
-
cpe:2.3:a:uap-core_project:uap-core:0.6.0
-
cpe:2.3:a:uap-core_project:uap-core:0.6.1
-
cpe:2.3:a:uap-core_project:uap-core:0.6.11
-
cpe:2.3:a:uap-core_project:uap-core:0.6.2
-
cpe:2.3:a:uap-core_project:uap-core:0.6.3
-
cpe:2.3:a:uap-core_project:uap-core:0.6.4
-
cpe:2.3:a:uap-core_project:uap-core:0.6.5
-
cpe:2.3:a:uap-core_project:uap-core:0.6.6
-
cpe:2.3:a:uap-core_project:uap-core:0.6.7
-
cpe:2.3:a:uap-core_project:uap-core:0.6.8
-
cpe:2.3:a:uap-core_project:uap-core:0.6.9
-
cpe:2.3:a:uap-core_project:uap-core:0.7.0
-
cpe:2.3:a:uap-core_project:uap-core:0.7.1
-
cpe:2.3:a:uap-core_project:uap-core:0.7.2
-
cpe:2.3:a:uap-core_project:uap-core:0.7.3
-
cpe:2.3:a:uap-core_project:uap-core:0.8.0
-
cpe:2.3:a:uap-core_project:uap-core:0.9.0