Title	:	Apache vulnerabilities
Name	:	USN-787-1	First Publication	:	2009-06-12
Vendor	:	Ubuntu	Last Modification	:	2009-06-12
Revision	:	N/A
Severity (Vendor)	:	N/A

Cvss Base Score	:	6.4	Attack Range	:	Network
Cvss Impact Score	:	4.9	Attack Complexity	:	Low
Cvss Expoit Score	:	10	Authentification	:	None Required

: A security issue affects the following Ubuntu releases:

Ubuntu 6.06 LTS
Ubuntu 8.04 LTS
Ubuntu 8.10
Ubuntu 9.04

This advisory also applies to the corresponding versions of
Kubuntu, Edubuntu, and Xubuntu.

The problem can be corrected by upgrading your system to the
following package versions:

Ubuntu 6.06 LTS:
apache2-common 2.0.55-4ubuntu2.5
apache2-mpm-perchild 2.0.55-4ubuntu2.5
apache2-mpm-prefork 2.0.55-4ubuntu2.5
apache2-mpm-worker 2.0.55-4ubuntu2.5
libapr0 2.0.55-4ubuntu2.5

Ubuntu 8.04 LTS:
apache2-mpm-event 2.2.8-1ubuntu0.8
apache2-mpm-perchild 2.2.8-1ubuntu0.8
apache2-mpm-prefork 2.2.8-1ubuntu0.8
apache2-mpm-worker 2.2.8-1ubuntu0.8
apache2.2-common 2.2.8-1ubuntu0.8

Ubuntu 8.10:
apache2-mpm-event 2.2.9-7ubuntu3.1
apache2-mpm-prefork 2.2.9-7ubuntu3.1
apache2-mpm-worker 2.2.9-7ubuntu3.1
apache2.2-common 2.2.9-7ubuntu3.1

Ubuntu 9.04:
apache2-mpm-event 2.2.11-2ubuntu2.1
apache2-mpm-prefork 2.2.11-2ubuntu2.1
apache2-mpm-worker 2.2.11-2ubuntu2.1
apache2.2-common 2.2.11-2ubuntu2.1

In general, a standard system upgrade is sufficient to effect the
necessary changes.

Details follow:

Matthew Palmer discovered an underflow flaw in apr-util as included in
Apache. An attacker could cause a denial of service via application crash
in Apache using a crafted SVNMasterURI directive, .htaccess file, or when
using mod_apreq2. This issue only affected Ubuntu 6.06 LTS. (CVE-2009-0023)

Sander de Boer discovered that mod_proxy_ajp would reuse connections when
a client closed a connection without sending a request body. A remote
attacker could exploit this to obtain sensitive response data. This issue
only affected Ubuntu 9.04. (CVE-2009-1191)

Jonathan Peatfield discovered that Apache did not process Includes options
correctly. With certain configurations of Options and AllowOverride, a
local attacker could use an .htaccess file to override intended
restrictions and execute arbitrary code via a Server-Side-Include file.
This issue affected Ubuntu 8.04 LTS, 8.10 and 9.04. (CVE-2009-1195)

It was discovered that the XML parser did not properly handle entity
expansion. A remote attacker could cause a denial of service via memory
resource consumption by sending a crafted request to an Apache server
configured to use mod_dav or mod_dav_svn. This issue only affected Ubuntu
6.06 LTS. (CVE-2009-1955)

C. Michael Pilato discovered an off-by-one buffer overflow in apr-util when
formatting certain strings. For big-endian machines (powerpc, hppa and
sparc in Ubuntu), a remote attacker could cause a denial of service or
information disclosure leak. All other architectures for Ubuntu are not
considered to be at risk. This issue only affected Ubuntu 6.06 LTS.
(CVE-2009-1956)

Weakness : CWE-776 - Unrestricted Recursive Entity References in DTDs ('XML Bomb') (From Oval)
Weakness : CWE-16 - Configuration (From NVD)
Weakness : CWE-119 - Failure to Constrain Operations within the Bounds of a Memory Buffer (From NVD)
Weakness : CWE-20 - Improper Input Validation (From NVD)
Weakness : CWE-189 - Numeric Errors (From NVD)
Weakness : CWE-399 - Resource Management Errors (From NVD)

53921 : Apache mod_proxy_ajp Cross Thread/Session Information Disclosure.
54733 : Apache HTTP Server AllowOverride Directive .htaccess Options Bypass.
55059 : Apache APR-util strmatch/apr_strmatch.c apr_strmatch_precompile Function Crafted Input Remote DoS.
55057 : Apache APR-util xml/apr_xml.c apr_xml_* Interface Expat XML Parser Crafted XML Document Remote DoS.
55058 : Apache APR-util apr_brigade_vprintf Function Crafted Input Off-by-one Remote DoS.