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centosCentOS ProjectCESA-2016:1421
HistoryJul 18, 2016 - 3:57 p.m.

httpd, mod_ssl security update

2016-07-1815:57:06
CentOS Project
lists.centos.org
59

6.8 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

8.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

0.2 Low

EPSS

Percentile

96.4%

CentOS Errata and Security Advisory CESA-2016:1421

The httpd packages provide the Apache HTTP Server, a powerful, efficient, and
extensible web server.

Security Fix(es):

  • It was discovered that httpd used the value of the Proxy header from HTTP
    requests to initialize the HTTP_PROXY environment variable for CGI scripts,
    which in turn was incorrectly used by certain HTTP client implementations to
    configure the proxy for outgoing HTTP requests. A remote attacker could possibly
    use this flaw to redirect HTTP requests performed by a CGI script to an
    attacker-controlled proxy via a malicious HTTP request. (CVE-2016-5387)

Note: After this update, httpd will no longer pass the value of the Proxy
request header to scripts via the HTTP_PROXY environment variable.

Red Hat would like to thank Scott Geary (VendHQ) for reporting this issue.

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2016-July/084140.html
https://lists.centos.org/pipermail/centos-announce/2016-July/084142.html

Affected packages:
httpd
httpd-devel
httpd-manual
httpd-tools
mod_ssl

Upstream details at:
https://access.redhat.com/errata/RHSA-2016:1421

6.8 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

8.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

0.2 Low

EPSS

Percentile

96.4%