Products & Services
Support

Product Categories


Popular Downloads


Manage Software

How to Buy

For Home

Linksys Products Store
Linksys is now part of Belkin
Products for everyone

All Ordering Options

Training & Events Partners
Guest

Vulnerability Alert

Apache HTTP Server MERGE Request Denial of Service Vulnerability

 
Threat Type:CWE-20: Input Validation
IntelliShield ID:30031
Version:8
First Published:2013 July 11 17:33 GMT
Last Published:2013 September 26 16:07 GMT
Port: Not available
CVE:CVE-2013-1896
BugTraq ID:61129
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:7.8 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:5.8
 
 
Version Summary:Oracle has released a security advisory and patches to address the Apache HTTP Server MERGE request denial of service vulnerability.
 
 
Description
A vulnerability in the mod_dav component of the Apache HTTP Server could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition.

The vulnerability is due to insufficient validation of user-supplied input while handling URI requests. An attacker could exploit the vulnerability by transmitting crafted URI requests to the targeted system. A successful exploit could allow the attacker to cause a DoS condition.

Apache has confirmed the vulnerability and released software updates.
 
Warning Indicators
Apache HTTP Server versions prior to 2.2.25 and prior to 2.4.6 are vulnerable.
 
IntelliShield Analysis
To exploit the vulnerability, the attacker would need access to trusted, internal networks to be able to transmit crafted requests to the targeted system. This access requirement may limit the likelihood of a successful exploit.
 
Vendor Announcements
Apache has released changelogs at the following links: Apache HTTP Server 2.2.25 and Apache HTTP Server 2.4.6

FreeBSD has released a VuXML document at the following link: apache24 -- several vulnerabilities

HP has released security bulletin c03922406 at the following link: HPSBUX02927 SSRT101288

Oracle has released a security advisory at the following link: CVE-2013-1896

Red Hat has released an official CVE statement and security advisories for bug 983549
at the following links: CVE-2013-1896, RHSA-2013:1133, RHSA-2013:1134, RHSA-2013:1156, RHSA-2013:1207, RHSA-2013:1208, and RHSA-2013:1209
 
Impact
An unauthenticated, remote attacker could exploit the vulnerability to cause a segfault error that may terminate the server daemon process, which may lead to a DoS condition.
 
Technical Information
The vulnerability is in the mod_dav component due to insufficient validation of user-supplied URI requests. The component incorrectly handles a MERGE request against a URI by the mod_dav_svn module with the source href pointing to a URI that is not configured for DAV, which could cause the server to stop responding.

An unauthenticated, remote attacker could exploit the vulnerability by transmitting a crafted MERGE request to a targeted system. A successful exploit could allow the attacker to cause a segfault error that could lead to a DoS condition on the server.
 
Safeguards
Administrators are advised to apply the appropriate updates.

Administrators are advised to allow only trusted users to have network access.

Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
 
Patches/Software
Apache has released updated version at the following links:

Apache HTTP Server 2.2.25
Apache HTTP Server 2.4.6

CentOS packages can be updated using the up2date or yum command.

FreeBSD releases ports collection updates at the following link: Ports Collection Index

HP has released software updates at the following link: HP-UX Web Server Suite v3.28 containing Apache v2.2.15.16

Oracle has released patches for registered users at the following link: Solaris 11.1 11.1.11.4.0

Red Hat has released updated software for registered subscribers at the following link: Red Hat Network. Red Hat packages can be updated on Red Hat Enterprise Linux versions 5 and later using the yum tool.
 
Alert History
 
Version 7, September 19, 2013, 4:49 PM: HP has released a security bulletin and software updates to address the Apache HTTP Server MERGE request denial of service vulnerability.

Version 6, September 5, 2013, 6:14 PM: Red Hat has released additional security advisories and updated packages to address the Apache HTTP Server MERGE request denial of service vulnerability.

Version 5, August 14, 2013, 12:10 PM: Red Hat has released an additional security advisory and updated packages to address the Apache HTTP Server MERGE request denial of service vulnerability. CentOS has also released updated packages to address this vulnerability.

Version 4, August 6, 2013, 12:36 PM: Red Hat has released additional security advisories and updated software to address the Apache HTTP Server MERGE request denial of service vulnerability.

Version 3, July 23, 2013, 3:17 PM: Apache has released a changelog and updated software to address the Apache HTTP Server MERGE request denial of service vulnerability.

Version 2, July 22, 2013, 6:49 PM: FreeBSD has released a VuXML document and updated ports collection to address the Apache HTTP Server MERGE request denial of service vulnerability.

Version 1, July 11, 2013, 5:33 PM: Apache HTTP Server contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition. Updates are available.


Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
Apache Software FoundationApache HTTP Server 2.2 .0, .1, .2, .3, .4, .6, .7, .8, .9, .10, .11, .12, .13, .14, .15, .16, .17, .18, .19, .20, .21, .22, .23, .24 | 2.4 .0, .1, .2, .3, .4, .5

Associated Products:
CentOS ProjectCentOS 5 .0 i386, .0 x86_64, .1 i386, .1 x86_64, .2 i386, .2 x86_64, .3 i386, .3 x86_64, .4 i386, .4 x86_64, .5 i386, .5 x86_64 | 6 .0 i386, .0 x86_64, .1 i386, .1 x86_64, .2 i386, .2 x86_64
FreeBSD ProjectFreeBSD 6.3 Base | 6.4 Base | 7.0 Base | 7.1 Base | 7.2 Base | 7.3 Base | 7.4 Base | 8.0 Base | 8.1 Base | 8.2 Base | 8.3 Base | 9.0 Base | 9.1 Base
HPHP-UX 11.23 Base | 11.31 Base
HPHP-UX Web Server Suite (HPUXWSSUITE) 3.0 Base | 3.12 Base | 3.13 Base | 3.14 Base | 3.15 Base | 3.17 Base | 3.18 Base | 3.19 Base | 3.20 Base | 3.21 Base | 3.22 Base | 3.23 Base | 3.24 Base | 3.25 Base | 3.26 Base | 3.27 Base
Oracle CorporationSolaris 11.1 Base
Red Hat, Inc.JBoss Enterprise Application Platform 6 EL5 IA-32, x86_64 | 6 EL6 IA-32, x86_64 | 6.1.0 Base
Red Hat, Inc.JBoss Enterprise Web Server EL5 IA-32, x86_64 | EL6 IA-32, x86_64
Red Hat, Inc.Red Hat Enterprise Linux 5 IA-32, IA-64, PPC, ppc64, s390, s390x, x86_64
Red Hat, Inc.Red Hat Enterprise Linux Server AUS 6.4 IA-32, x86_64
Red Hat, Inc.Red Hat Enterprise Linux Desktop 5 IA-32, x86_64 | 6 IA-32, x86_64
Red Hat, Inc.Red Hat Enterprise Linux Desktop Workstation 5 IA-32, x86-64
Red Hat, Inc.Red Hat Enterprise Linux EUS (Extended Update Support) 5.9.z Base, IA-32, IA-64, PPC, PPC-64, s390x, x86_64
Red Hat, Inc.Red Hat Enterprise Linux HPC Node 6 x86_64
Red Hat, Inc.Red Hat Enterprise Linux Long Life 5.9 IA-32, IA-64, x86_64
Red Hat, Inc.Red Hat Enterprise Linux Server 6 IA-32, PPC, PPC 64, s390, s390x, x86_64
Red Hat, Inc.Red Hat Enterprise Linux Server EUS 6.4z Base, IA-32, x86_64, PPC, PPC64, s390, s390x
Red Hat, Inc.Red Hat Enterprise Linux Workstation 6 IA-32, x86_64




Alerts and bulletins on the Cisco Security Intelligence Operations Portal are highlighted by analysts in the Cisco Threat Operations Center and represent a subset of the comprehensive content that is available through Cisco Security IntelliShield Alert Manager Service. This customizable threat and vulnerability alert service provides security staff with access to timely, accurate, and credible information about threats and vulnerabilities that may affect their environment.


LEGAL DISCLAIMER
The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.
Powered by  IntelliShield