#VU25628 Resource exhaustion in uap-core - CVE-2020-5243
Published: February 26, 2020
Vulnerability identifier: #VU25628
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-5243
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
uap-core
uap-core
Software vendor:
ua-parser
ua-parser
Description
The vulnerability allows a remote attacker to perform a regular expression denial of service (REDoS).
The vulnerability exists due to overlapping capture groups when processing crafted User-Agent strings. A remote attacker can overload a server by setting the User-Agent header in an HTTP(S) request to maliciously crafted long strings, trigger resource exhaustion and perform a regular expression denial of service (REDoS) attack.
Remediation
Install updates from vendor's website.