CVE-2016-5385
HighHTTP Proxy header vulnerability
Published Apr 7, 2022 · Updated Oct 14, 2026 · Also known as DEBIAN-CVE-2016-5385, DEBIAN-CVE-2016-7124, DEBIAN-CVE-2016-7128, DEBIAN-CVE-2016-7129, DEBIAN-CVE-2016-7130, DEBIAN-CVE-2016-7131, DEBIAN-CVE-2016-7132, DEBIAN-CVE-2016-7411, DEBIAN-CVE-2016-7412, DEBIAN-CVE-2016-7413, DEBIAN-CVE-2016-7414, DEBIAN-CVE-2016-7416, DEBIAN-CVE-2016-7417, DEBIAN-CVE-2016-7418, DLA-749-1, DSA-3631-1, GHSA-m6ch-gg5f-wxx3, SUSE-SU-2016:2941-1, UBUNTU-CVE-2016-5385
Key Facts
Patch immediately- CVE-2016-5385 is a high-severity vulnerability (CVSS 8.1 v3.1) affecting Drupal, System Management Homepage (Hp), Communications User Data Repository (Oracle) and 22 more products.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 50% probability of exploitation in the next 30 days.
- Fixed versions are available, including amphp/artax 1.0.4, amphp/artax 2.0.4, apache2-mod_php5 5.5.14-56.1.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
8.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
50%
Higher than 98.9% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2016-5385 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
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.
Affected Products
379 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| DrupalDrupal | See advisory | 8.1.7 |
| System Management HomepageHp | See advisory | 7.5.5.0 |
| Communications User Data RepositoryOracle | 10.0.0, 10.0.1, 12.0.0 | n/a |
| Enterprise Manager Ops CenterOracle | 12.2.2, 12.3.2 | n/a |
| PHPPHP | See advisory | 5.5.38 |
Patched Releases
amphp/artax
1.0.4, 2.0.4
apache2-mod_php5
5.5.14-56.1, 5.5.14-68.1
apache2-mod_php7
7.0.7-25.1, 7.0.7-6.2
bugsnag/bugsnag-laravel
2.0.2
Drupal
8.1.7
drupal/core
8.1.7
drupal/drupal
8.1.7
guzzlehttp/guzzle
4.2.4, 5.3.1, 6.2.1
Storeever Msl6480 Tape Library Firmware
5.09
System Management Homepage
7.5.5.0
padraic/humbug_get_contents
1.1.2
PHP
0:5.3.3-48.el6_8, 0:5.4.16-36.3.el7_2, 5.3.3-48.el6_8, 5.4.16-36.3.el7_2, 5.5.38
php-bcmath
5.3.3-48.el6_8, 5.4.16-36.3.el7_2
php-cli
5.3.3-48.el6_8, 5.4.16-36.3.el7_2
php-common
5.3.3-48.el6_8, 5.4.16-36.3.el7_2
php-dba
5.3.3-48.el6_8, 5.4.16-36.3.el7_2
php-devel
5.3.3-48.el6_8, 5.4.16-36.3.el7_2
php-embedded
5.3.3-48.el6_8, 5.4.16-36.3.el7_2
php-enchant
5.3.3-48.el6_8, 5.4.16-36.3.el7_2
php-fpm
5.3.3-48.el6_8, 5.4.16-36.3.el7_2
php-gd
5.3.3-48.el6_8, 5.4.16-36.3.el7_2
php-imap
5.3.3-48.el6_8
php-intl
5.3.3-48.el6_8, 5.4.16-36.3.el7_2
php-ldap
5.3.3-48.el6_8, 5.4.16-36.3.el7_2
php-mbstring
5.3.3-48.el6_8, 5.4.16-36.3.el7_2
Timeline
Publicly disclosed
Apr 7, 2022
Last updated
Oct 14, 2026
Weakness Type
- CWE-20 Improper Input Validation
- CWE-601 URL Redirection to Untrusted Site ('Open Redirect')
References
- advisoryopenSUSE-SU-2016:1922
- advisoryhttp://php.net/ChangeLog-7.php#7.0.9
- advisoryRHSA-2016:1609
- advisoryRHSA-2016:1610
- advisoryRHSA-2016:1611
FAQ
Common Questions.
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…
Affected: Drupal; System Management Homepage (Hp); Communications User Data Repository (Oracle) versions 10.0.0, 10.0.1, 12.0.0, among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including amphp/artax 1.0.4, amphp/artax 2.0.4, apache2-mod_php5 5.5.14-56.1.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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