Vulnerability in Apache HTTP Server
CVE-2016-5387
The Apache HTTP Server through 2.4.23 follows RFC 3875 section 4.1.18 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, aka an "httpoxy" issue. NOTE: the vendor states "This mitigation has been assigned the identifier CVE-2016-5387"; in other words, this is not a CVE ID for a vulnerability.
EPSS: 0.557 (99.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Apache Http_server
- Hp System_management_homepage
- Oracle Communications_user_data_repository
- Oracle Enterprise_manager_ops_center — versions 12.2.2, 12.3.2
- Oracle Linux — versions 5, 6, 7
- Oracle Solaris — versions 11.3
- Canonical Ubuntu_linux — versions 12.04, 14.04, 15.10
- Debian Debian_linux — versions 8.0
- Fedoraproject Fedora — versions 23, 24
- Opensuse Leap — versions 42.1
Public proof-of-concept exploits
References
- secalert@redhat.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_SECTRACK, Broken Link)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_CONFIRM, Third Party Advisory)
- secalert@redhat.com (x_refsource_CONFIRM, Third Party Advisory)
- secalert@redhat.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_UBUNTU, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (US Government Resource, x_refsource_CERT-VN, Third Party Advisory, third-party-advisory)
- secalert@redhat.com (x_refsource_CONFIRM, Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2016-5387?
- CVE-2016-5387 is a high-severity vulnerability in Apache HTTP Server. CVSS score: 8.1/10. Published 2016-07-19.
- How severe is CVE-2016-5387?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2016-5387 known to be exploited?
- 64 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.