Apache HTTP Server mod_ssl plain HTTP request denial of service
| apache-modssl-plain-dos (15419) |  Medium Risk |
Description:
Apache HTTP Server is vulnerable to a denial of service, caused by a memory leak in the mod_ssl authentication module. If a vulnerable server is enabled for SSL, a remote attacker could send plain HTTP requests to the SSL port to cause the daemon to crash.
Platforms Affected:
- Apache, HTTP Server 2.0.35
- Apache, HTTP Server 2.0.36
- Apache, HTTP Server 2.0.37
- Apache, HTTP Server 2.0.38
- Apache, HTTP Server 2.0.39
- Apache, HTTP Server 2.0.40
- Apache, HTTP Server 2.0.41
- Apache, HTTP Server 2.0.42
- Apache, HTTP Server 2.0.43
- Apache, HTTP Server 2.0.44
- Apache, HTTP Server 2.0.45
- Apache, HTTP Server 2.0.46
- Apache, HTTP Server 2.0.47
- Apache, HTTP Server 2.0.48
- Compaq, Tru64 5.1b
- Conectiva, Linux 8.0
- Conectiva, Linux 9.0
- Gentoo, Linux
- MandrakeSoft, Mandrake Linux 10.0 AMD64
- MandrakeSoft, Mandrake Linux 10.0
- MandrakeSoft, Mandrake Linux 9.1
- MandrakeSoft, Mandrake Linux 9.1 PPC
- MandrakeSoft, Mandrake Linux 9.2 AMD64
- MandrakeSoft, Mandrake Linux 9.2
- Novell, UnitedLinux 1.0
- RedHat, Enterprise Linux 3 AS
- RedHat, Enterprise Linux 3 ES
- RedHat, Enterprise Linux 3 WS
- RedHat, Linux 9.0
- SuSE, SuSE Linux 8.1
- SuSE, SuSE Linux 9.0
- SuSE, SuSE Linux 9.1
- SuSE, SuSE Linux Connectivity Server
- SuSE, SuSE Linux Database Server
- SuSE, SuSE Linux Enterprise Server 7.0
- SuSE, SuSE Linux Office Server
- Trustix, Secure Linux 2.0
- Trustix, Secure Linux 2.1
- Turbolinux, Turbolinux 10 Desktop
Remedy:
Upgrade to the latest version of Apache HTTP Server (2.0.49-dev or later), available from the Apache HTTP Server Web site. See References.
For Red Hat Linux:
Upgrade to the latest httpd package, as listed below. Refer to RHSA-2004:084-14 for more information. See References.
Red Hat Enterprise Linux AS (v. 3), ES (v. 3), and WS (v.3): 2.0.46-32 or later
For Red Hat Linux 9:
Upgrade to the latest httpd package (2.0.40-21.11 or later), as listed in RHSA-2004:182-03. See References.
For Trustix Secure Linux:
Upgrade to the latest apache package, as listed below. Refer to Trustix Secure Linux Security Advisory #2004-0017 for more information. See References.
Trustix Secure Linux 2.0: 2.0.49-2tr or later
Trustix Secure Linux 2.1: 2.0.49-2tr or later
For Turbolinux:
Upgrade to the latest httpd package, as listed below. Refer to Turbolinux Security Advisory TLSA-2004-11 for more information. See References.
Turbolinux 10 Desktop: 2.0.47-8 or later
For Conectiva Linux:
Upgrade to the latest apache package, as listed below. Refer to Conectiva Linux Security Announcement CLSA-2004:839. See References.
Conectiva Linux 8: 1.3.28-1U80_3cl or later
Conectiva Linux 9: 2.0.45-2879OU90_6cl or later
For Mandrake Linux:
Upgrade to the latest apache2 package, as listed below. Refer to MandrakeSoft Security Advisory MDKSA-2004:043 : apache2 for more information. See References.
Mandrake Linux 9.1: 2.0.47-1.7.91mdk or later
Mandrake Linux 9.2: 2.0.47-6.4.92mdk or later
Mandrake Linux 10.0: 2.0.48-6.1.100mdk or later
For HP Tru64 UNIX 5.1B:
Apply the appropriate Early Release Patches (ERPs) for your system, as listed in HP Security Bulletin HPSBTU01049. See References.
For other distributions:
Apply the appropriate update for your system. See References.
Consequences:
Denial of Service
References:
- Apache Bug 27106, Possible memory leak when accessing SSL port with plain HTTP at http://nagoya.apache.org/bugzilla/show_bug.cgi?id=27106.
- Apache HTTP Server Project Web site, Welcome! - The Apache HTTP Server Project at http://httpd.apache.org/.
- CIAC Information Bulletin O-128, Apache HTTP Server 2.0.49 Release Fixes Security Vulnerabilities at http://www.ciac.org/ciac/bulletins/o-128.shtml.
- CIAC Information Bulletin O-128, Apache HTTP Server 2.0.49 Release Fixes Security Vulnerabilities [REVISED 4 Aug 2004] at http://www.ciac.org/ciac/bulletins/o-128.shtml.
- CIAC Information Bulletin O-128, Apache HTTP Server 2.0.49 Release Fixes Security Vulnerabilities Apache HTTP Server 2.0.49 Release Fixes Security VulnerabilitiesApache HTTP Server 2.0.49 Release Fixes Security Vulnerabilities [REVISED 7 July 2004] at http://www.ciac.org/ciac/bulletins/o-128.shtml.
- CIAC Information Bulletin O-138, Apple Mac OS X Jaguar and Panther Security Vulnerabilities at http://www.ciac.org/ciac/bulletins/o-138.shtml.
- Conectiva Linux Security Announcement CLSA-2004:839, DoS in mod_ssl and log escape sequences vulnerability at http://distro.conectiva.com/atualizacoes/index.php?id=a&anuncio=000839.
- IBM Systems Support Web site, Support for HMC at https://www14.software.ibm.com/webapp/set2/sas/f/hmc/power5/install/v61.Readme.html#MH01110.
- Trustix Secure Linux Security Advisory #2004-0017, apache at http://www.linuxsecurity.com/content/view/105880/109/. (From LinuxSecurity archive)
- BID-9826: Apache Mod_SSL HTTP Request Remote Denial Of Service Vulnerability
- CVE-2004-0113: Memory leak in ssl_engine_io.c for mod_ssl in Apache 2 before 2.0.49 allows remote attackers to cause a denial of service (memory consumption) via plain HTTP requests to the SSL port of an SSL-enabled server.
- GLSA-200403-04: Multiple security vulnerabilities in Apache 2
- MDKSA-2004:043: Updated apache2 packages fixes a denial of service vulnerability in mod_ssl
- OSVDB ID: 4182: Apache HTTP Server mod_ssl Plain HTTP Request DoS
- RHSA-2004-084: httpd security update
- RHSA-2004-182: Updated httpd packages fix mod_ssl security issue
- SUSE-SA:2004:008: cvs: remote code execution
- SUSE-SA:2004:009: Linux Kernel: local privilege escalation / information leakage
- SUSE-SA:2004:012: mc: local privilege escalation
Reported:
Mar 09, 2004
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 the author/distributor (Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.
Copyright (c) 1994-2008 Internet Security Systems, Inc. All rights reserved worldwide.
For corrections or additions please email xforce@iss.net