CVE-2016-1000109

MEDIUM

HHVM < 3.9.6, 3.10.0-3.12.4, 3.13.0-3.14.2 - HTTP Proxy Header Injection via HTTP_PROXY Environment Variable

Title source: llm
STIX 2.1

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).

References (3)

Core 3
Core References
Exploit, Mitigation, Third Party Advisory x_refsource_misc
https://httpoxy.org/
Third Party Advisory x_refsource_confirm
https://www.facebook.com/security/advisories/cve-2016-1000109

Scores

CVSS v3 5.3
EPSS 0.0495
EPSS Percentile 91.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Details

CWE
CWE-665
Status published
Products (1)
facebook/hhvm < 3.9.6
Published Feb 19, 2020
Tracked Since Feb 18, 2026