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.
Consequences:
Denial of Service
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.
References:
- Apache Bug 27106: Possible memory leak when accessing SSL port with plain HTTP .
- Apache HTTP Server Project Web site: Welcome! - The Apache HTTP Server Project.
- CIAC Information Bulletin O-128: Apache HTTP Server 2.0.49 Release Fixes Security Vulnerabilities [REVISED 4 Aug 2004].
- CIAC Information Bulletin O-128: Apache HTTP Server 2.0.49 Release Fixes Security Vulnerabilities.
- 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].
- CIAC Information Bulletin O-138: Apple Mac OS X Jaguar and Panther Security Vulnerabilities.
- Conectiva Linux Security Announcement CLSA-2004:839: DoS in mod_ssl and log escape sequences vulnerability.
- IBM Systems Support Web site: Support for HMC.
- Trustix Secure Linux Security Advisory #2004-0017: apache. (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
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 PPC
- MandrakeSoft Mandrake Linux 9.1
- MandrakeSoft Mandrake Linux 9.2 AMD64
- MandrakeSoft Mandrake Linux 9.2
- Novell SuSE Linux Enterprise Server 7.0
- Novell UnitedLinux 1.0
- RedHat Enterprise Linux 3 WS
- RedHat Enterprise Linux 3 AS
- RedHat Enterprise Linux 3 ES
- 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 Office Server
- Trustix Secure Linux 2.0
- Trustix Secure Linux 2.1
- Turbolinux Turbolinux 10 Desktop
Reported:
Mar 09, 2004
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