Oracle Linux 6 : httpd (ELSA-2017-1721)

Medium Nessus Plugin ID 101382


The remote Oracle Linux host is missing one or more security updates.


From Red Hat Security Advisory 2017:1721 :

An update for httpd is now available for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

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

Security Fix(es) :

* It was discovered that the HTTP parser in httpd incorrectly allowed certain characters not permitted by the HTTP protocol specification to appear unencoded in HTTP request headers. If httpd was used in conjunction with a proxy or backend server that interpreted those characters differently, a remote attacker could possibly use this flaw to inject data into HTTP responses, resulting in proxy cache poisoning. (CVE-2016-8743)

Note: The fix for the CVE-2016-8743 issue causes httpd to return '400 Bad Request' error to HTTP clients which do not strictly follow HTTP protocol specification. A newly introduced configuration directive 'HttpProtocolOptions Unsafe' can be used to re-enable the old less strict parsing. However, such setting also re-introduces the CVE-2016-8743 issue.

Note: Administrators of Red Hat Satellite 5 and Red Hat Satellite Proxy 5 systems should consult Red Hat Knowledgebase article 3013361 linked to in the Reference section before installing this update.

Bug Fix(es) :

* Previously, httpd was unable to correctly check a boundary of an array, and in rare cases it attempted to access an element of an array that was out of bounds. Consequently, httpd terminated unexpectedly with a segmentation fault at proxy_util.c. With this update, bounds checking has been fixed, and httpd no longer crashes. (BZ#1463354)


Update the affected httpd packages.

See Also

Plugin Details

Severity: Medium

ID: 101382

File Name: oraclelinux_ELSA-2017-1721.nasl

Version: $Revision: 3.4 $

Type: local

Agent: unix

Published: 2017/07/12

Modified: 2018/02/01

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 5

Temporal Score: 4.1

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N

Temporal Vector: CVSS2#E:F/RL:OF/RC:ND


Base Score: 7.5

Temporal Score: 6.9

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

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:X

Vulnerability Information

CPE: p-cpe:/a:oracle:linux:httpd, p-cpe:/a:oracle:linux:httpd-devel, p-cpe:/a:oracle:linux:httpd-manual, p-cpe:/a:oracle:linux:httpd-tools, p-cpe:/a:oracle:linux:mod_ssl, cpe:/o:oracle:linux:6

Required KB Items: Host/local_checks_enabled, Host/OracleLinux, Host/RedHat/release, Host/RedHat/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2017/07/12

Reference Information

CVE: CVE-2016-8743

OSVDB: 149054

RHSA: 2017:1721