CVE-2020-5243 MEDIUM

CVE-2020-5243: Denial of Service in uap-core when processing crafted User-Agent strings

Vendor Ua-Parser
Product uap-core
Weakness CWE-20 · Input validation
Published February 20, 2020
Last update August 4, 2024
View on NVD All CVEs

CVSS base score

5.7/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction Required
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

uap-core before 0.7.3 is vulnerable to a denial of service attack when processing crafted User-Agent strings. 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 has been patched in uap-core 0.7.3.

Key dates

02Disclosure timeline

February 20, 2020 CVE published
August 4, 2024 Record updated