CVE-2016-6287

Name: CVE-2016-6287
Creator: NVD / NIST
Published: 2017-01-10T15:59:00.347+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.48%

Last modified Jun 17, 2026

CVE-2016-6287 is a vulnerability of currently unknown severity. The "http-client" egg always used a HTTP_PROXY environment variable to determine whether HTTP traffic should be routed via a proxy, even when running as a CGI process. Under several web servers this would mean a user-supplied "Proxy" header could allow an attacker to direct all HTTP requests through a proxy (also known as a "httpoxy" attack). EPSS estimates a 1.48% chance of exploitation in the next 30 days.

Description

The "http-client" egg always used a HTTP_PROXY environment variable to determine whether HTTP traffic should be routed via a proxy, even when running as a CGI process. Under several web servers this would mean a user-supplied "Proxy" header could allow an attacker to direct all HTTP requests through a proxy (also known as a "httpoxy" attack). This affects all versions of http-client before 0.10.

Metrics

EPSS Probability

1.48%

70.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-19

Affected Software

Vendor	Product	Versions
Call-Cc	Http-Client	<= 0.9

References

http://lists.gnu.org/archive/html/chicken-announce/2016-07/msg00000.htmlMitigation, Third Party Advisory
http://www.securityfocus.com/bid/92105Third Party Advisory, VDB Entry
http://lists.gnu.org/archive/html/chicken-announce/2016-07/msg00000.htmlMitigation, Third Party Advisory
http://www.securityfocus.com/bid/92105Third Party Advisory, VDB Entry

Timeline

Published: Jan 10, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-6287?

How severe is CVE-2016-6287?

Severity scoring for CVE-2016-6287 is pending analysis. The EPSS model estimates a 1.48% probability of exploitation in the next 30 days.

How do I fix CVE-2016-6287?

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-2016-6287?

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

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Source: NVD / NIST