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Test ID:
Category:Red Hat Local Security Checks
Title:RedHat Update for httpd RHSA-2017:1721-01
Summary:The remote host is missing an update for the 'httpd'; package(s) announced via the referenced advisory.
The remote host is missing an update for the 'httpd'
package(s) announced via the referenced advisory.

Vulnerability Insight:
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 references 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)

Affected Software/OS:
httpd on
Red Hat Enterprise Linux Desktop (v. 6),
Red Hat Enterprise Linux Server (v. 6),
Red Hat Enterprise Linux Workstation (v. 6)

Please Install the Updated Packages.

CVSS Score:

CVSS Vector:

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2016-8743
BugTraq ID: 95077
Debian Security Information: DSA-3796 (Google Search)
RedHat Security Advisories: RHSA-2017:0906
RedHat Security Advisories: RHSA-2017:1161
RedHat Security Advisories: RHSA-2017:1413
RedHat Security Advisories: RHSA-2017:1414
RedHat Security Advisories: RHSA-2017:1415
RedHat Security Advisories: RHSA-2017:1721
CopyrightCopyright (C) 2017 Greenbone Networks GmbH

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