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CVE-2005-2700

Status Candidate

Overview

ssl_engine_kernel.c in mod_ssl before 2.8.24, when using "SSLVerifyClient optional" in the global virtual host configuration, does not properly enforce "SSLVerifyClient require" in a per-location context, which allows remote attackers to bypass intended access restrictions.

Related Files

Apple Security Advisory 2005-11-29
Posted Dec 2, 2005
Authored by Apple | Site apple.com

Apple Security Advisory - Apple has released a security update which addresses over a dozen vulnerabilities.

tags | advisory, vulnerability
systems | apple
advisories | CVE-2005-2088, CVE-2005-2700, CVE-2005-2757, CVE-2005-3185, CVE-2005-3700, CVE-2005-2969, CVE-2005-3701, CVE-2005-2491, CVE-2005-3702, CVE-2005-3703, CVE-2005-3705, CVE-2005-1993, CVE-2005-3704
SHA-256 | e7bb6ec0504327630e33ae50f3e506dd37e28fb70583d43167e478159852984a
HP Security Bulletin 2005-10.43
Posted Oct 8, 2005
Authored by Hewlett Packard | Site hp.com

HP Security Bulletin - A potential security vulnerability has been identified with Apache running on HP-UX where the vulnerability could be exploited remotely to bypass client-based certificate authentication and gain unauthorized access to certain web pages.

tags | advisory, web
systems | hpux
advisories | CVE-2005-2700
SHA-256 | 236ac9f717d5af9a85f8bb1175d7955ec053fed46743ec7fd8f31ab7e23f6953
Gentoo Linux Security Advisory 200509-12
Posted Sep 22, 2005
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory GLSA 200509-12 - mod_ssl contains a security issue when SSLVerifyClient optional is configured in the global virtual host configuration (CVE-2005-2700). Also, Apache's httpd includes a PCRE library, which makes it vulnerable to an integer overflow (CVE-2005-2491). Versions less than 2.8.24 are affected.

tags | advisory, overflow
systems | linux, gentoo
advisories | CVE-2005-2491, CVE-2005-2700
SHA-256 | a3b8bf8a9ed588fcf293e0f39c75f16aebcec3ebad2d43c5b100569496f78336
Debian Linux Security Advisory 807-1
Posted Sep 13, 2005
Authored by Debian | Site debian.org

Debian Security Advisory DSA 807-1 - A problem has been discovered in mod_ssl, which provides strong cryptography (HTTPS support) for Apache that allows remote attackers to bypass access restrictions.

tags | advisory, remote, web
systems | linux, debian
advisories | CVE-2005-2700
SHA-256 | 64c4fd269f6db8701f4f4fe549738e4f401dac7d4390012b1519e374c2461b6c
Mandriva Linux Security Advisory 2005.161
Posted Sep 13, 2005
Authored by Mandriva | Site mandriva.com

Mandriva Linux Security Update Advisory - A flaw was discovered in mod_ssl's handling of the SSLVerifyClient directive. This flaw occurs if a virtual host is configured using SSLVerifyClient optional and a directive SSLVerifyClient required is set for a specific location. For servers configured in this fashion, an attacker may be able to access resources that should otherwise be protected, by not supplying a client certificate when connecting. A flaw was discovered in Apache httpd where the byterange filter would buffer certain responses into memory. If a server has a dynamic resource such as a CGI script or PHP script that generates a large amount of data, an attacker could send carefully crafted requests in order to consume resources, potentially leading to a Denial of Service.

tags | advisory, denial of service, cgi, php
systems | linux, mandriva
advisories | CVE-2005-2700, CVE-2005-2728
SHA-256 | d8ac7a09a10fda0bcf0e418be47a3e0e0888e664ca28011b661fb6856ae40716
Debian Linux Security Advisory 805-1
Posted Sep 10, 2005
Authored by Debian | Site debian.org

Debian Security Advisory DSA 805-1 - Several problems have been discovered in Apache2, the next generation, scalable, extendible web server. The Common Vulnerabilities and Exposures project identifies the following problems:

tags | advisory, web, vulnerability
systems | linux, debian
advisories | CVE-2005-1268, CVE-2005-2088, CVE-2005-2700, CVE-2005-2728
SHA-256 | 76ee9e0a891c5fe605b17c1465e881628ca40b4b293425b87ac49a639a55e4c0
Ubuntu Security Notice 177-1
Posted Sep 8, 2005
Authored by Ubuntu, Martin Pitt | Site security.ubuntu.com

Ubuntu Security Notice USN-177-1 - apache2, libapache-mod-ssl vulnerabilities - Apache did not honour the "SSLVerifyClient require" directive within a block if the surrounding block contained a directive "SSLVerifyClient optional". This allowed clients to bypass client certificate validation on servers with the above configuration. Also, Filip Sneppe discovered a Denial of Service vulnerability in the byte range filter handler. By requesting certain large byte ranges, a remote attacker could cause memory exhaustion in the server.

tags | advisory, remote, denial of service, vulnerability
systems | linux, ubuntu
advisories | CVE-2005-2700, CVE-2005-2728
SHA-256 | f63bd9e3e650b2f1d6cbf6e4bceff6b9f82ee6c95a22dc5b50cef9f0bab677b0
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