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HTTP Request Redirection Affecting guzzlehttp/guzzle package, versions >=6, <6.2.1 >=5, <5.3.1 >=4.0.0-rc2, <4.2.4

0.0
high

Snyk CVSS

    Attack Complexity High
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 95.07% (100th percentile)
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NVD
8.1 high
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Red Hat
5 medium

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  • Snyk ID SNYK-PHP-GUZZLEHTTPGUZZLE-70104
  • published 15 Jul 2015
  • disclosed 15 Jul 2015
  • credit Unknown
Report a new vulnerability Found a mistake?

Introduced: 15 Jul 2015

CVE-2016-5385 Open this link in a new tab
CWE-601 Open this link in a new tab

How to fix?

Upgrade guzzlehttp/guzzle to version 6.2.1, 5.3.1, 4.2.4 or higher.

Overview

Affected versions of guzzlehttp/guzzle are vulnerable to HTTP Proxy header vulnerability.

PHP through 7.0.8 does not attempt to address RFC 3875 section 4.1.18 namespace conflicts and therefore does not protect applications from the presence of untrusted 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, as demonstrated by (1) an application that makes a getenv('HTTP_PROXY') call or (2) a CGI configuration of PHP, aka an "httpoxy" issue.