Ubuntu update for python-urllib3

1) CRLF injection

EUVDB-ID: #VU47403

Risk: Medium

CVSSv4.0: 0.6 [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 - Improper Neutralization of CRLF Sequences ('CRLF Injection')

Exploit availability: No

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.

Mitigation

Update the affected package python-urllib3 to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 20.04

python3-urllib3 (Ubuntu package): before 1.13.1-2ubuntu0.16.04.4

python-urllib3 (Ubuntu package): before 1.13.1-2ubuntu0.16.04.4

CPE2.3

• cpe:2.3:o:canonical:ubuntu:16.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:18.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:20.04:*:*:*:*:*:*:*
• cpe:2.3:a:canonical:python3-urllib3_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:python-urllib3_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-4570-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.