macOS : macOS Server < 5.2 Multiple Vulnerabilities (httpoxy)

High Nessus Plugin ID 93813


The remote host is missing a security update for macOS Server.


The version of macOS Server (formerly known as Mac OS X Server) installed on the remote host is prior to 5.2. It is, therefore, affected by the following vulnerabilities :

- The Apache HTTP Server is affected by a man-in-the-middle vulnerability known as 'httpoxy' due to a failure to properly resolve namespace conflicts in accordance with RFC 3875 section 4.1.18. The HTTP_PROXY environment variable is set based on untrusted user data in the 'Proxy' header of HTTP requests. The HTTP_PROXY environment variable is used by some web client libraries to specify a remote proxy server. An unauthenticated, remote attacker can exploit this, via a crafted 'Proxy' header in an HTTP request, to redirect an application's internal HTTP traffic to an arbitrary proxy server where it may be observed or manipulated.

- Multiple unspecified flaws exist that are related to the RC4 algorithm that allow an unauthenticated, remote attacker to defeat cryptographic protection mechanisms.


Upgrade to macOS Server version 5.2 or later. Note that macOS Server version 5.2 is available only for macOS 10.12 or later.

See Also

Plugin Details

Severity: High

ID: 93813

File Name: macos_server_5_2.nasl

Version: 1.7

Type: local

Agent: macosx

Published: 2016/09/30

Updated: 2018/07/14

Dependencies: 50680

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.5

Temporal Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 9.1

Temporal Score: 7.9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:apple:os_x_server

Required KB Items: Host/local_checks_enabled, Host/MacOSX/Version, MacOSX/Server/Version

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2016/09/20

Vulnerability Publication Date: 2016/03/21

Reference Information

CVE: CVE-2016-4694, CVE-2016-4754

BID: 93060, 93061

APPLE-SA: APPLE-SA-2016-09-20-4