CVE-2016-1000109

Public Exploit

Description

HHVM does not attempt to address RFC 3875 section 4.1.18 namespace conflicts and therefore does not protect CGI applications from the presence of untrusted client data in the HTTP_PROXY environment variable, which might allow remote attackers to redirect a CGI application's outbound HTTP traffic to an arbitrary proxy server via a crafted Proxy header in an HTTP request, aka an "httpoxy" issue. This issue affects HHVM versions prior to 3.9.6, all versions between 3.10.0 and 3.12.4 (inclusive), and all versions between 3.13.0 and 3.14.2 (inclusive).

Category

5.3
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.69% Top 30%
Third-Party Advisory github.com Third-Party Advisory httpoxy.org Third-Party Advisory facebook.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://httpoxy.org/ mitigation third party advisory exploit
https://github.com/facebook/hhvm/commit/423b4b719afd5ef4e6e19d8447fbf7b6bc0d0a25 third party advisory patch
https://www.facebook.com/security/advisories/cve-2016-1000109 third party advisory

Frequently Asked Questions

What is the severity of CVE-2016-1000109?
CVE-2016-1000109 has been scored as a medium severity vulnerability.
How to fix CVE-2016-1000109?
To fix CVE-2016-1000109, 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-2016-1000109 being actively exploited in the wild?
It is possible that CVE-2016-1000109 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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