Apache HTTP Server mod_proxy module denial of service
| apache-modproxy-module-dos (42987) |  Low Risk |
Description:
Apache HTTP Server is vulnerable to a denial of service, caused by an error in the mod_proxy module ap_proxy_http_process_response function. A remote attacker could exploit this vulnerability via forwarded "Expect: 100-continue" requests from the server to the client to cause the consumption of memory resources.
Note: This vulnerability affects multiple vendor HTTP server components that utilize the Apache mod_status module. See References.IBM3
Platforms Affected:
- Apache, HTTP Server 2.0.63
- Apache, HTTP Server 2.2.8
- Apple, Mac OS X 10.5.5
- Apple, Mac OS X Server 10.5.5
- Canonical, Ubuntu 6.06 LTS
- Canonical, Ubuntu 7.10
- Canonical, Ubuntu 8.04 LTS
- Gentoo, Linux
- HP, HP-UX B.11.11
- HP, HP-UX B.11.23
- HP, HP-UX B.11.31
- IBM, WebSphere Application Server 6.0.2
- IBM, WebSphere Application Server 6.1
- MandrakeSoft, Mandrake Linux 2007.1 X86_64
- MandrakeSoft, Mandrake Linux 2007.1
- MandrakeSoft, Mandrake Linux 2008.0 X86_64
- MandrakeSoft, Mandrake Linux 2008.0
- MandrakeSoft, Mandrake Linux 2008.1
- MandrakeSoft, Mandrake Linux 2008.1 X86_64
- MandrakeSoft, Mandrake Linux Corporate Server 3.0 X86_64
- MandrakeSoft, Mandrake Linux Corporate Server 3.0
- MandrakeSoft, Mandrake Linux Corporate Server 4.0 X86_64
- MandrakeSoft, Mandrake Linux Corporate Server 4.0
- MandrakeSoft, Mandrake Multi Network Firewall 2.0
- RedHat, Enterprise Linux 3 Desktop
- RedHat, Enterprise Linux 3 WS
- RedHat, Enterprise Linux 3 AS
- RedHat, Enterprise Linux 3 ES
- RedHat, Enterprise Linux 4 Desktop
- RedHat, Enterprise Linux 4 AS
- RedHat, Enterprise Linux 4 ES
- RedHat, Enterprise Linux 4 WS
- RedHat, Enterprise Linux 5 Client
- RedHat, Enterprise Linux 5
- RedHat, Enterprise Linux 5 Client Workstation
- RedHat, RHEL Application Stack 2
- Sun, Solaris 10 SPARC
- Sun, Solaris 10 x86
- Turbolinux, Turbolinux 10 Server
- Turbolinux, Turbolinux 10 Server x64 Ed
- Turbolinux, Turbolinux 11 Server
- Turbolinux, Turbolinux 11 Server x64 Ed
- Turbolinux, Turbolinux FUJI
- Turbolinux, Turbolinux Multimedia
- Turbolinux, Turbolinux Personal
- Turbolinux, Turbolinux Appliance Server 2.0
Remedy:
Apply the patch for this vulnerability, available from the Apache-SVN Repository. See References.
For WebSphere Application Server 6.0.2:
Apply the latest Fix Pack (6.0.2.31 or later) or APAR PK67579. See References.
For WebSphere Application Server 6.1.0:
Apply the latest Fix Pack (6.0.2.19 or later) or APAR PK67579. See References.
——OR——
As a workaround, ensure the directive starting with the following text is commented out in the HIS configuration: LoadModule proxy_module
For other distributions:
Apply the appropriate update for your system. See References.
Consequences:
Denial of Service
References:
- Apache Web site, Welcome! - The Apache HTTP Server Project at http://httpd.apache.org/.
- Apache-SVN Repository, Diff of /httpd/httpd/trunk/CHANGES at http://svn.apache.org/viewvc/httpd/httpd/trunk/CHANGES?r1=666154&r2=666153&pathrev=666154.
- Apache-SVN Repository, Diff of /httpd/httpd/trunk/modules/proxy/mod_proxy_http.c at http://svn.apache.org/viewvc/httpd/httpd/trunk/modules/proxy/mod_proxy_http.c?r1=666154&r2=666153&pathrev=666154.
- Apple Web site, About Security Update 2008-007 at http://support.apple.com/kb/HT3216.
- HPSBUX02365 SSRT080118 rev.1, HP-UX Running Apache, Remote Cross Site Scripting (XSS) or Denial of Service (DoS) at http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01539432.
- HPSBUX02401 SSRT090005 rev.1, HP-UX Running Apache Web Server Suite, Remote Denial of Service (DoS), Cross-site Scripting (XSS), Execution of Arbitrary Code, Cross-Site Request Forgery (CSRF) at http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&objectID=c01650939.
- IBM Support & downloads, Fix list for IBM WebSphere Application Server version 6.1 at http://www-01.ibm.com/support/docview.wss?uid=swg27007951.
- IBM Support & downloads, Fix list for WebSphere Application Server Version 6.0.2 at http://www-01.ibm.com/support/docview.wss?uid=swg27006876.
- IBM Support & downloads, Fix list for IBM HTTP Server Version 6.1 at http://www-01.ibm.com/support/docview.wss?uid=swg27008517.
- Sun Alert ID: 247666, Security Vulnerabilities in the Apache 2.0 "mod_proxy_http" and "mod_proxy_ftp" Modules may Lead to Denial of Service (DoS) or Cross Site Scripting (XSS) at http://sunsolve.sun.com/search/document.do?assetkey=1-66-247666-1.
- ASA-2008-468: Red Hat Application Stack v2.2 security and enhancement update (RHSA-2008-0966)
- ASA-2008-472: httpd security and bug fix update (RHSA-2008-0967)
- BID-29653: Apache 'mod_proxy_http' Interim Response Denial of Service Vulnerability
- BID-31681: RETIRED: Apple Mac OS X 2008-007 Multiple Security Vulnerabilities
- CVE-2008-2364: The ap_proxy_http_process_response function in mod_proxy_http.c in the mod_proxy module in the Apache HTTP Server 2.0.63 and 2.2.8 does not limit the number of forwarded interim responses, which allows remote HTTP servers to cause a denial of service (memory consumption) via a large number of interim responses.
- GLSA-200807-06: Apache: Denial of Service
- MDVSA-2008:195: apache
- MDVSA-2008:237: apache2
- RHSA-2008-0966: Moderate: Red Hat Application Stack v2.2 security and enhancement update
- RHSA-2008-0967: Moderate: httpd security and bug fix update
- SA30621: Apache mod_proxy Interim Responses Denial of Service
- SA31904: IBM HTTP Server mod_proxy Interim Responses Denial of Service
- SA32222: Apple Mac OS X Security Update Fixes Multiple Vulnerabilities
- SA33156: Sun Solaris Apache "mod_proxy_http" and "mod_proxy_ftp" Vulnerabilities
- SECTRACK ID: 1020267: Apache mod_proxy Interim Response Process Bug Lets Remote Users Deny Service
- SUSE-SR:2009:006: SUSE Security Summary Report
- SUSE-SR:2009:007: SUSE Security Summary Report
Reported:
Jun 10, 2008
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