CVE-2016-1000109 Information

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).

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Reference

https://github.com/facebook/hhvm/commit/423b4b719afd5ef4e6e19d8447fbf7b6bc0d0a25 https://httpoxy.org/ https://www.facebook.com/security/advisories/cve-2016-1000109

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

LOW

Base Score

NONE

Base Severity

5.3