Apache HTTP Server speculative mode denial of service
| apache-modssl-speculative-dos (17273) |  Low Risk |
Description:
Apache HTTP Server is vulnerable to a denial of service attack, caused by a vulnerability in the mod_ssl authentication module when running in speculative mode. A remote attacker could send a specially-crafted proxy request to the vulnerable server to cause a denial of service.
Platforms Affected:
- Apache, HTTP Server 2.0
- Apache, HTTP Server 2.0.28
- Apache, HTTP Server 2.0.32
- 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
- Apache, HTTP Server 2.0.49
- Apache, HTTP Server 2.0.50
- Apple, Mac OS X Server 10.2.8
- Apple, Mac OS X Server 10.3.6
- Conectiva, Linux 10
- Conectiva, Linux 9.0
- Gentoo, Linux
- HP, HP-UX 11.00
- HP, HP-UX 11.11
- HP, HP-UX 11.22
- HP, HP-UX 11.23
- MandrakeSoft, Mandrake Linux 10.0
- MandrakeSoft, Mandrake Linux 10.0 AMD64
- MandrakeSoft, Mandrake Linux 9.2
- MandrakeSoft, Mandrake Linux 9.2 AMD64
- RedHat, Enterprise Linux 3 WS
- RedHat, Enterprise Linux 3 ES
- RedHat, Enterprise Linux 3 Desktop
- RedHat, Enterprise Linux 3 AS
- SuSE, Linux Enterprise Server 9
- SuSE, SuSE Linux 8.1
- SuSE, SuSE Linux 8.2
- SuSE, SuSE Linux 9.0
- SuSE, SuSE Linux 9.1
- SuSE, SuSE SLES 9
- Trustix, Enterprise Server 2
- Trustix, Secure Linux 2.0
- Trustix, Secure Linux 2.1
- Turbolinux, Turbolinux 10 Desktop
- Turbolinux, Turbolinux 10 F...
- Turbolinux, Turbolinux 10 Server
- Turbolinux, Turbolinux Home
Remedy:
For SuSE Linux:
Upgrade to the latest apache2 package, as listed below. Refer to SuSE Security Announcement SUSE-SA:2004:030 for more information. See References.
SuSE Linux 9.1: 2.0.49-27.11 or later
SuSE Linux 9.0, 8.2 and 8.1: 2.0.48-135 or later
For Red Hat Linux:
Upgrade to the latest httpd package, as listed below. Refer to RHSA-2004:463-09 for more information. See References.
Red Hat Enterprise Linux AS (v. 3), ES (v. 3), WS (v. 3), Desktop: 2.0.46-40.ent.x86_64 or later
For Mandrake Linux:
Upgrade to the latest apache2 package, as listed below. Refer to MandrakeSoft Security Advisory MDKSA-2004:096 : apache2 for more information. See References.
Mandrake Linux 9.2: 2.0.47-6.9.92mdk or later
Mandrake Linux 10.0: 2.0.48-6.6.100mdk or later
For Trustix Secure Linux:
Upgrade to the latest apache package, as listed below. Refer to Trustix Secure Linux Security Advisory #2004-0047 for more information. See References.
Trustix Secure Linux 2.0: 2.0.51-0.1tr or later
Trustix Secure Linux 2.1 and Enterprise Server 2: 2.0.51-1tr or later
For Gentoo Linux:
Upgrade to the latest version of apache (2.0.51, < 2.0 or later) or mod_dav (1.0.3-r2 or later), as listed in GLSA 200409-21. See References.
For Conectiva Linux:
Upgrade to the latest apache package, as listed below. Refer to Conectiva Linux Security Announcement CLSA-2004:868 for more information. See References.
Conectiva Linux 10: 2.0.49-61251U10_1cl or later
Conectiva Linux 9: 2.0.45-28790U90_8cl or later
For HP 11.00, 11.11, 11.22, and 11.23:
Apply the appropriate patch for your system, as listed in Hewlett-Packard Company Security Bulletin HPSBUX01090 for more information. See References.
For Mac OS:
Apply Security Update 2004-12-02, as listed in AppleCare Knowledge Base Document 61798. See References.
For TurboLinux:
Upgrade to the latest httpd package (2.0.51-8 or later), as listed in Turbolinux Security Advisory TLSA-2005-2. See References.
For other distributions:
Apply the appropriate update for your system. See References.
Consequences:
Denial of Service
References:
- AppleCare Knowledge Base Document 61798, Security Update 2004-12-02 at http://docs.info.apple.com/article.html?artnum=61798.
- BugTraq Mailing List, Sat Sep 11 2004 - 01:14:06 CDT, Remote buffer overflow in Apache mod_ssl when reverse proxying SSL at http://archives.neohapsis.com/archives/bugtraq/2004-09/0096.html.
- CIAC Information Bulletin P-049, Apple Security Update 2004-12-02 at http://www.ciac.org/ciac/bulletins/p-049.shtml.
- Conectiva Linux Security Announcement CLSA-2004:868, Several vulnerabilities in apache, mod_ssl and mod_dav at http://distro.conectiva.com.br/atualizacoes/index.php?id=a&anuncio=000868.
- 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 #2004-0047, Several security holes at http://www.trustix.net/errata/2004/0047/.
- BID-11154: Apache mod_ssl Remote Denial of Service Vulnerability
- CVE-2004-0751: The char_buffer_read function in the mod_ssl module for Apache 2.x, when using reverse proxying to an SSL server, allows remote attackers to cause a denial of service (segmentation fault).
- GLSA-200409-21: Apache 2, mod_dav: Multiple vulnerabilities
- MDKSA-2004:096: Updated apache2 packages fix multiple vulnerabilities
- RHSA-2004-463: httpd security update
- SUSE-SA:2004:030: apache2: remote DoS condition
Reported:
Sep 06, 2004
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