CVE-2016-4694

Name: CVE-2016-4694
Creator: NVD / NIST
Published: 2016-09-25T10:59:03.45+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.34%

Last modified Jun 17, 2026

CVE-2016-4694 is a vulnerability of currently unknown severity. The Apache HTTP Server in Apple OS X before 10.12 and OS X Server before 5.2 follows RFC 3875 section 4.1.18 and therefore does not protect applications from the presence of untrusted CGI client data in the HTTP_PROXY environment variable, which might allow remote attackers to redirect an application's outbound HTTP traffic to an arbitrary proxy server via a crafted Proxy header in an HTTP request, aka an "httpoxy" issue, a related issue to CVE-2016-5387.. EPSS estimates a 1.34% chance of exploitation in the next 30 days.

Description

The Apache HTTP Server in Apple OS X before 10.12 and OS X Server before 5.2 follows RFC 3875 section 4.1.18 and therefore does not protect applications from the presence of untrusted CGI client data in the HTTP_PROXY environment variable, which might allow remote attackers to redirect an application's outbound HTTP traffic to an arbitrary proxy server via a crafted Proxy header in an HTTP request, aka an "httpoxy" issue, a related issue to CVE-2016-5387.

Metrics

EPSS Probability

1.34%

67.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-284

Affected Software

Vendor	Product	Versions
Apple	Mac Os X	<= 10.11.6
Apple	Os X Server	<= 5.1

References

http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.htmlMailing List, Vendor Advisory
http://lists.apple.com/archives/security-announce/2016/Sep/msg00009.htmlMailing List, Vendor Advisory
http://www.securityfocus.com/bid/93060
http://www.securitytracker.com/id/1036853
https://support.apple.com/HT207170Vendor Advisory
https://support.apple.com/HT207171Vendor Advisory
http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.htmlMailing List, Vendor Advisory
http://lists.apple.com/archives/security-announce/2016/Sep/msg00009.htmlMailing List, Vendor Advisory
http://www.securityfocus.com/bid/93060
http://www.securitytracker.com/id/1036853
https://support.apple.com/HT207170Vendor Advisory
https://support.apple.com/HT207171Vendor Advisory

Timeline

Published: Sep 25, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-4694?

How severe is CVE-2016-4694?

Severity scoring for CVE-2016-4694 is pending analysis. The EPSS model estimates a 1.34% probability of exploitation in the next 30 days.

How do I fix CVE-2016-4694?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-4694?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST