Ubuntu update for Apache HTTP Server

1) Httpoxy issue

EUVDB-ID: #VU337

Risk: Medium

CVSSv4.0: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2016-5387

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to obtain potentially sensitive information and compromise vulnerable server.

The vulnerability exists due to a design error in multiple implementations of web servers. A remote unauthenticated attacker can use a specially crafted Proxy header in HTTP request to influence HTTP_PROXY environment variable and redirect application’s HTTP traffic to arbitrary proxy server.

Successful exploitation of this vulnerability may allow an attacker to gain unauthorized access to sensitive information and compromise vulnerable server.

This vulnerability is known as httppoxy.

Mitigation

Update the affected packages

Ubuntu 16.04 LTS:

apache2-bin 2.4.18-2ubuntu3.1

Ubuntu 15.10:

apache2-bin 2.4.12-2ubuntu2.1

Ubuntu 14.04 LTS:

apache2.2-bin 2.4.7-1ubuntu4.13

Ubuntu 12.04 LTS:

apache2.2-bin 2.2.22-1ubuntu1.11

Vulnerable software versions

Ubuntu: 12.04 - 16.04

CPE2.3

• cpe:2.3:o:canonical:ubuntu:12.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:14.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:16.04:*:*:*:*:*:*:*

External links

https://www.ubuntu.com/usn/usn-3038-1/

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. However, proof of concept for this vulnerability is available.