RHEL 3 : httpd (RHSA-2009:1108)

This script is Copyright (C) 2009-2014 Tenable Network Security, Inc.


Synopsis :

The remote Red Hat host is missing one or more security updates.

Description :

Updated httpd packages that fix multiple security issues are now
available for Red Hat Enterprise Linux 3.

This update has been rated as having moderate security impact by the
Red Hat Security Response Team.

The Apache HTTP Server is a popular Web server. The httpd package
shipped with Red Hat Enterprise Linux 3 contains an embedded copy of
the Apache Portable Runtime (APR) utility library, a free library of C
data structures and routines, which includes interfaces to support XML
parsing, LDAP connections, database interfaces, URI parsing, and more.

An off-by-one overflow flaw was found in the way apr-util processed a
variable list of arguments. An attacker could provide a specially
crafted string as input for the formatted output conversion routine,
which could, on big-endian platforms, potentially lead to the
disclosure of sensitive information or a denial of service
(application crash). (CVE-2009-1956)

Note: The CVE-2009-1956 flaw only affects big-endian platforms, such
as the IBM S/390 and PowerPC. It does not affect users using the httpd
package on little-endian platforms, due to their different
organization of byte ordering used to represent particular data.

A denial of service flaw was found in the apr-util Extensible Markup
Language (XML) parser. A remote attacker could create a specially
crafted XML document that would cause excessive memory consumption
when processed by the XML decoding engine. (CVE-2009-1955)

A heap-based underwrite flaw was found in the way apr-util created
compiled forms of particular search patterns. An attacker could
formulate a specially crafted search keyword, that would overwrite
arbitrary heap memory locations when processed by the pattern
preparation engine. (CVE-2009-0023)

All httpd users should upgrade to these updated packages, which
contain backported patches to correct these issues. After installing
the updated packages, the httpd daemon must be restarted for the
update to take effect.

See also :

https://www.redhat.com/security/data/cve/CVE-2009-0023.html
https://www.redhat.com/security/data/cve/CVE-2009-1955.html
https://www.redhat.com/security/data/cve/CVE-2009-1956.html
http://rhn.redhat.com/errata/RHSA-2009-1108.html

Solution :

Update the affected httpd, httpd-devel and / or mod_ssl packages.

Risk factor :

High / CVSS Base Score : 7.8
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C)
CVSS Temporal Score : 5.8
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Red Hat Local Security Checks

Nessus Plugin ID: 39432 ()

Bugtraq ID: 35221
35251
35253

CVE ID: CVE-2009-0023
CVE-2009-1955
CVE-2009-1956