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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.557 (99.0th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.557 · newest: 0.557 · change: 0.000
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 Linux — versions 8.0
- Fedoraproject Fedora — versions 23, 24
- openSUSE Leap — versions 42.1
Public proof-of-concept exploits
References
- www.securitytracker.com/id/1036330 (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
- access.redhat.com/errata/RHSA-2016:1420 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2016:1635 (vendor-advisory, Third Party Advisory)
- support.apple.com/HT208221 (Third Party Advisory)
- h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay (Third Party Advisory)
- www.securityfocus.com/bid/91816 (VDB Entry, Third Party Advisory, vdb-entry)
- access.redhat.com/errata/RHSA-2016:1851 (vendor-advisory, Third Party Advisory)
- www.ubuntu.com/usn/USN-3038-1 (vendor-advisory, Third Party Advisory)
- www.kb.cert.org/vuls/id/797896 (US Government Resource, Third Party Advisory, third-party-advisory)
- www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html (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.