The Apache HTTP Server through 2.4.23 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 "This mitigation has been assigned the identifier CVE-2016-5387"; in other words, this is not a CVE ID for a vulnerability.

References[email protected][email protected][email protected]/message/6WCTE7443AYZ4EGELWLVNANA2WJCJIYI/[email protected]/message/NEKZAB7MTWVSMORHTEMCQNFFMIHCYF76/[email protected]/message/QPQAPWQA774JPDRV4UIB2SZAX6D3UZCV/[email protected]/message/TGNHXJJSWDXAOEYH5TMXDPQVJMQQJOAZ/


Source: MITRE

Published: 2016-07-19

Updated: 2019-12-27

Type: CWE-284

Risk Information

CVSS v2.0

Base Score: 5.1

Vector: AV:N/AC:H/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 4.9

Severity: MEDIUM

CVSS v3.0

Base Score: 8.1

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 2.2

Severity: HIGH