CVE-2016-5387

high

Published 2016-07-19 · Modified 2026-05-06

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CVSS v3

8.1

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

CVSS v4 NEW

—

not yet in upstream

VIR risk

8.1

Description

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.

Predictions

Exploit likelihood

88%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

Fedora Affected 2 releases

Version	Status	Fixed in
24	Affected	—
23	Affected	—

SUSE Affected 3 releases

Version	Status	Fixed in
42.1	Affected	—
13.2	Affected	—
—	Affected	—

Ubuntu Affected 4 releases

Version	Status	Fixed in
16.04	Affected	—
15.10	Affected	—
14.04	Affected	—
12.04	Affected	—

Debian Mixed 6 releases

Version	Status	Fixed in
trixie	Fixed	`2.4.23-2`
sid	Fixed	`2.4.23-2`
forky	Fixed	`2.4.23-2`
bullseye	Fixed	`2.4.23-2`
bookworm	Fixed	`2.4.23-2`
8.0	Affected	—

Red Hat Mixed 8 releases

Version	Status	Fixed in
7.7	Affected	—
7.6	Affected	—
7.5	Affected	—
7.4	Affected	—
7.3	Affected	—
7.2	Affected	—
7.0	Not affected	—
6.0	Not affected	—

Application impact

Vendor	Product	Versions
apache	http_server	`{"startIncluding":"2.2.0","endIncluding":"2.2.31"}`
hp	system_management_homepage	`{"endIncluding":"7.5.5.0"}`
oracle	communications_user_data_repository	`{"startIncluding":"10.0.0","endIncluding":"12.4"}`
oracle	enterprise_manager_ops_center	`12.2.2`
oracle	enterprise_manager_ops_center	`12.3.2`
redhat	jboss_web_server	`2.1.0`
redhat	jboss_enterprise_web_server	`2.0.0`
redhat	jboss_enterprise_web_server	`3.0.0`
redhat	jboss_core_services	`1.0`
apache	http_server	`{"startIncluding":"2.4.1","endIncluding":"2.4.23"}`

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.