Ubuntu update for python3.5

1) Open redirect

EUVDB-ID: #VU67591

Risk: Low

CVSSv3.1: 3 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-28861

CWE-ID: CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Exploit availability: No

Description

The vulnerability allows a remote attacker to redirect victims to arbitrary URL.

The vulnerability exists due to improper sanitization of user-supplied data in lib/http/server.py due to missing protection against multiple (/) at the beginning of URI path. A remote attacker can create a link that leads to a trusted website, however, when clicked, redirects the victim to arbitrary domain.

Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.

Mitigation

Update the affected package python3.5 to the latest version.

Vulnerable software versions

Ubuntu: 16.04

libpython3.5 (Ubuntu package): before 3.5.22ubuntu0~16.04.13+esm5

python3.5-minimal (Ubuntu package): before 3.5.22ubuntu0~16.04.13+esm5

python3.5 (Ubuntu package): before 3.5.22ubuntu0~16.04.13+esm5

libpython3.5-minimal (Ubuntu package): before 3.5.22ubuntu0~16.04.13+esm5

libpython3.5-stdlib (Ubuntu package): before 3.5.22ubuntu0~16.04.13+esm5

External links

http://ubuntu.com/security/notices/USN-5629-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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