Cleartext transmission of sensitive information in py-django (Alpine package)

Published: 2019-07-18

Risk	Medium
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2019-12781
CWE-ID	CWE-319
Exploitation vector	Local network
Public exploit	N/A
Vulnerable software	py-django (Alpine package) Operating systems & Components / Operating system package or component
Vendor	Alpine Linux Development Team

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Cleartext transmission of sensitive information

EUVDB-ID: #VU18967

Risk: Medium

CVSSv4.0: 1.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-12781

CWE-ID: CWE-319 - Cleartext Transmission of Sensitive Information

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to django.http.HttpRequest.scheme, when deployed behind a reverse-proxy, does not correctly treat requests sent over HTTP protocol, assuming that a secure protocol is used for communication. A remote attacker with ability to force victim to use HTTP instead of HTTPS protocol can perform man-in-the-middle (MitM) attack and intercept communication in cleat text.

Mitigation

Install update from vendor's website.

Vulnerable software versions

py-django (Alpine package): 1.7-r0 - 1.11.21-r0

py-django (Alpine package):

CPE2.3

External links

https://git.alpinelinux.org/aports/commit/?id=05df5a7eeb09061bdf012d07511da2456cb4f394
https://git.alpinelinux.org/aports/commit/?id=2bf8de409de29218b845158bf2dcfdce10b33611
https://git.alpinelinux.org/aports/commit/?id=567a56572370de5becee0aadddedd2d09a8b1add
https://git.alpinelinux.org/aports/commit/?id=5e2845599266000b2347b98ebba695ac77e015a0
https://git.alpinelinux.org/aports/commit/?id=b6c78e1959e4b0971f6f4d301c1a284692dc2b08

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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