Vulnerability in Apache HTTP Server
CVE-2016-8743
Apache HTTP Server, in all releases prior to 2.2.32 and 2.4.25, was liberal in the whitespace accepted from requests and sent in response lines and headers. Accepting these different behaviors represented a security concern when httpd participates in any chain of proxies or interacts with back-end application servers, either through mod_proxy or using conventional CGI mechanisms, and may result in request smuggling, response splitting and cache pollution.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.133 (96.3th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.133 · newest: 0.133 · change: 0.000
Affected products
- Apache HTTP Server
- Apache Software Foundation HTTP Server — versions 2.2.0 to 2.2.31, 2.4.1 to 2.4.23
- NetApp Clustered Data Ontap
- NetApp Oncommand Unified Manager
- Debian Linux — versions 8.0, 9.0
- Red Hat Enterprise Linux — versions 6.0, 7.0
- Red Hat Enterprise Linux Desktop — versions 6.0, 7.0
- Red Hat Enterprise Linux Eus — versions 7.3, 7.4, 7.5
- Red Hat Enterprise Linux Server — versions 6.0, 7.0
- Red Hat Enterprise Linux Server Aus — versions 7.3, 7.4, 7.6
Public proof-of-concept exploits
References
- support.apple.com/HT208221 (Third Party Advisory)
- www.debian.org/security/2017/dsa-3796 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:1721 (vendor-advisory, Third Party Advisory)
- www.securitytracker.com/id/1037508 (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
- access.redhat.com/errata/RHSA-2017:1413 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:1161 (vendor-advisory, Third Party Advisory)
- www.tenable.com/security/tns-2017-04 (Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:1414 (vendor-advisory, Third Party Advisory)
- h20566.www2.hpe.com/hpsc/doc/public/display (Third Party Advisory)
- www.securityfocus.com/bid/95077 (VDB Entry, Third Party Advisory, vdb-entry)
Frequently asked questions
- What is CVE-2016-8743?
- CVE-2016-8743 is a high-severity vulnerability in Apache HTTP Server. CVSS score: 7.5/10. Published 2017-07-27.
- How severe is CVE-2016-8743?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2016-8743 known to be exploited?
- 22 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.