CVE-2016-5388

Description

Apache Tomcat 7.x through 7.0.70 and 8.x through 8.5.4, when the CGI Servlet is enabled, 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 "A mitigation is planned for future releases of Tomcat, tracked as CVE-2016-5388"; in other words, this is not a CVE ID for a vulnerability.

Category

8.1
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 69.06% Top 5%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory securitytracker.com Vendor Advisory apache.org Vendor Advisory apache.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/errata/RHSA-2016:1635 third party advisory vendor advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05320149 third party advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05324759 third party advisory
http://www.kb.cert.org/vuls/id/797896 third party advisory us government resource
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html third party advisory
http://rhn.redhat.com/errata/RHSA-2016-2045.html third party advisory vendor advisory
http://rhn.redhat.com/errata/RHSA-2016-2046.html third party advisory vendor advisory
https://tomcat.apache.org/tomcat-7.0-doc/changelog.html release notes vendor advisory
http://www.securityfocus.com/bid/91818 vdb entry third party advisory
http://lists.opensuse.org/opensuse-updates/2016-09/msg00025.html third party advisory vendor advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722 third party advisory
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03770en_us third party advisory
http://rhn.redhat.com/errata/RHSA-2016-1624.html third party advisory vendor advisory
https://www.apache.org/security/asf-httpoxy-response.txt vendor advisory
https://httpoxy.org/ third party advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html third party advisory patch
http://www.securitytracker.com/id/1036331 vdb entry third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2016:1636 third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2019/08/msg00015.html mailing list
https://lists.apache.org/thread.html/053d9ce4d579b02203db18545fee5e33f35f2932885459b74d1e4272%40%3Cissues.activemq.apache.org%3E mailing list
https://lists.apache.org/thread.html/6d3d34adcf3dfc48e36342aa1f18ce3c20bb8e4c458a97508d5bfed1%40%3Cissues.activemq.apache.org%3E mailing list
https://lists.apache.org/thread.html/6b414817c2b0bf351138911c8c922ec5dd577ebc0b9a7f42d705752d%40%3Cissues.activemq.apache.org%3E mailing list
https://lists.apache.org/thread.html/rc6b2147532416cc736e68a32678d3947b7053c3085cf43a9874fd102%40%3Cusers.tomcat.apache.org%3E mailing list
https://lists.apache.org/thread.html/r2853582063cfd9e7fbae1e029ae004e6a83482ae9b70a698996353dd%40%3Cusers.tomcat.apache.org%3E mailing list
https://lists.apache.org/thread.html/rf21b368769ae70de4dee840a3228721ae442f1d51ad8742003aefe39%40%3Cusers.tomcat.apache.org%3E mailing list

Frequently Asked Questions

What is the severity of CVE-2016-5388?
CVE-2016-5388 has been scored as a high severity vulnerability.
How to fix CVE-2016-5388?
To fix CVE-2016-5388, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-5388 being actively exploited in the wild?
It is possible that CVE-2016-5388 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~69% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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