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.
References
- https://nvd.nist.gov/vuln/detail/CVE-2016-5385
- https://bugzilla.redhat.com/show_bug.cgi?id=1353794
- https://github.com/FriendsOfPHP/security-advisories/blob/master/guzzlehttp/guzzle/CVE-2016-5385.yaml
- https://github.com/guzzle/guzzle/releases/tag/6.2.1
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03770en_us
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05320149
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05333297
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722
- https://httpoxy.org/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7RMYXAVNYL2MOBJTFATE73TOVOEZYC5R/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GXFEIMZPSVGZQQAYIQ7U7DFVX3IBSDLF/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KZOIUYZDBWNDDHC6XTOLZYRMRXZWTJCP/
- https://security.gentoo.org/glsa/201611-22
- https://www.drupal.org/SA-CORE-2016-003
- http://lists.opensuse.org/opensuse-updates/2016-08/msg00003.html
- http://rhn.redhat.com/errata/RHSA-2016-1609.html
- http://rhn.redhat.com/errata/RHSA-2016-1610.html
- http://rhn.redhat.com/errata/RHSA-2016-1611.html
- http://rhn.redhat.com/errata/RHSA-2016-1612.html
- http://rhn.redhat.com/errata/RHSA-2016-1613.html
- http://www.debian.org/security/2016/dsa-3631
- http://www.kb.cert.org/vuls/id/797896
- http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
- http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
- http://www.securityfocus.com/bid/91821
- http://www.securitytracker.com/id/1036335
- https://github.com/advisories/GHSA-m6ch-gg5f-wxx3