Apache mod_proxy_balancer balancer_handler function denial of service
| apache-modproxybalancer-dos (39476) |  Medium Risk |
Description:
Apache is vulnerable to a denial of service, caused by an error in the mod_proxy_balancer module balancer_handler function when using a threaded Multi-Processing Module. By sending a specially-crafted request to the bb variable during the editing of worker settings, a remote authenticated attacker could crash the child process handling the request.
*CVSS:
| Base Score: | 4 |
| Access Vector: | Network |
| Access Complexity: | Low |
| Authentication: | Single |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Partial |
| Temporal Score: | 3 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
Upgrade to the latest version of Apache (2.2.7-dev or later), available from the Apache Web site. See References.
For other distributions: Apply the appropriate update for your system.
References:
- Apache Web site: Fixed in Apache httpd 2.2.7-dev - low: mod_proxy_balancer DoS CVE-2007-6422.
- HPSBMA02442 SSRT090108: HP Business Availability Center Running Apache, Remote Cross Site Scripting (XSS), Cross Site Request Forgery (CSRF), Denial of Service (DoS).
- SecurityReason Advisory: SecurityAlert : 48: Apache2 CSRF, XSS, Memory Corruption and Denial of Service Vulnerability.
- ASA-2008-027: httpd security update (RHSA-2008-0007)
- BID-27236: Apache 'mod_proxy_balancer' Multiple Vulnerabilities
- CVE-2007-6422: The balancer_handler function in mod_proxy_balancer in the Apache HTTP Server 2.2.0 through 2.2.6, when a threaded Multi-Processing Module is used, allows remote authenticated users to cause a denial of service (child process crash) via an invalid bb variable.
- GLSA-200803-19: Apache: Multiple vulnerabilities
- MDVSA-2008:016: Updated apache 2.2.x packages fix multiple vulnerabilities
- RHSA-2008-0008: Moderate: httpd security update
- RHSA-2008-0009: Moderate: httpd security update
- SA39944: HP Business Availability Center Multiple Vulnerabilities
- SUSE-SA:2008:021: Apache security problems
Platforms Affected:
- Apache HTTP Server 2.2
- Apache HTTP Server 2.2.1
- Apache HTTP Server 2.2.2
- Apache HTTP Server 2.2.3
- Apache HTTP Server 2.2.4
- Apache HTTP Server 2.2.5 Dev
- Apache HTTP Server 2.2.6
- Canonical Ubuntu 6.06 LTS
- Canonical Ubuntu 6.10
- Canonical Ubuntu 7.04
- Canonical Ubuntu 7.10
- Gentoo Linux
- HP Business Availability Center 8.01
- MandrakeSoft Mandrake Linux 2007
- MandrakeSoft Mandrake Linux 2007 X86_64
- 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 Corporate Server 4.0
- MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
- Novell Linux Desktop 9
- Novell Linux Desktop 9 SDK
- Novell Linux POS 9
- Novell Open Enterprise Server
- Novell Open Enterprise Server
- Novell OpenSUSE 10.2
- Novell OpenSUSE 10.3
- Novell SLE SDK 10 SP1
- Novell SLE SDK 10
- Novell SUSE Linux Enterprise Desktop 10 SP1
- Novell SUSE Linux Enterprise Server 10 SP1
- Novell SUSE Linux Enterprise Server 10
- RedHat Enterprise Linux 5 Client Workstation
- RedHat Enterprise Linux 5 Client
- RedHat Enterprise Linux 5
- RedHat RHEL Application Stack 2
- SuSE SuSE SLES 9
- 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 1.0 Hosting Ed
- Turbolinux Turbolinux Appliance Server 1.0 Workgroup Ed
- Turbolinux Turbolinux Appliance Server 2.0
Reported:
Jan 04, 2008
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.