Medium severity · published Feb 19, 2020
CVE-2016-1000109
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…
5.3
CVSS
5.1%
EPSS
No
On KEV
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
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)5.1% · higher than 92% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HH
Hhvm · Facebook
before 3.9.6; 3.10.0 through 3.12.4; 3.13.0 through 3.14.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-1000109
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-1000109
Patch
https://github.com/facebook/hhvm/commit/423b4b719afd5ef4e6e19d8447fbf7b6bc0d0a25
Exploit
https://httpoxy.org/
Third Party Advisory
https://www.facebook.com/security/advisories/cve-2016-1000109
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