#VU47403 CRLF injection in urllib3 - CVE-2020-26137
Published: September 30, 2020 / Updated: July 20, 2022
Vulnerability identifier: #VU47403
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-26137
CWE-ID: CWE-93
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
urllib3
urllib3
Software vendor:
shazow (Andrey Petrov)
shazow (Andrey Petrov)
Description
The vulnerability allows a remote attacker to inject arbitrary data in server response.
The vulnerability exists due to insufficient validation of attacker-supplied data passed via the "method" parameter. A remote authenticated attacker can pass specially crafted data to the application containing CR-LF characters and modify application behavior.
Remediation
Install updates from vendor's website.