OpenSSL libssl denial of service
| openssl-libssl-dos (43948) |  Low Risk |
Description:
OpenSSL and the Apache HTTP Server are vulnerable to a denial of service, caused by a memory leak within the libssl library and the mod_ssl module. By invoking multiple SSL connections with zlib support, a remote attacker could exploit this vulnerability to consume an overly large amount of memory resulting in a denial of service.
Platforms Affected:
- Apache, HTTP Server 2.2.8
- Apple, Mac OS X 10.5.5
- Apple, Mac OS X Server 10.5.5
- Canonical, Ubuntu 6.06 LTS
- Canonical, Ubuntu 7.10
- Canonical, Ubuntu 8.04 LTS
- Gentoo, Linux
- MandrakeSoft, Mandrake Linux 2008.1
- MandrakeSoft, Mandrake Linux 2008.1 X86_64
- MandrakeSoft, Mandrake Linux Corporate Server 4.0 X86_64
- MandrakeSoft, Mandrake Linux Corporate Server 4.0
- Mandriva, Linux 2009.0
- Mandriva, Linux 2009.0 X86_64
- OpenSSL, OpenSSL 0.9.8f
- OpenSSL, OpenSSL 0.9.8g
- OpenSSL, OpenSSL 0.9.8h
- RedHat, Enterprise Linux 5 Client
- RedHat, Enterprise Linux 5 Client Workstation
- RedHat, Enterprise Linux 5
- RedHat, Enterprise Linux 5.3.z EUS
Remedy:
For Apache HTTP Server:
Upgrade to the latest version of Apache (2.2.9 or later), available from the Apache Web site. See References.
For other distributions:
Apply the appropriate update for your system. See References.
Consequences:
Denial of Service
References:
- Apache Web site, Apache at http://apache.org.
- Apple Web site, About Security Update 2008-007 at http://support.apple.com/kb/HT3216.
- Gentoo Bugzilla Bug 222643, www-servers/apache <2.2.8-r3 memory leak with mod_ssl and zlib compression (CVE-2008-1678) at http://bugs.gentoo.org/show_bug.cgi?id=222643.
- OpenSSL Web site, OpenSSL: The Open Source toolkit for SSL/TLS at http://www.openssl.org/.
- openssl-dev Mailing List, 2008-05-12 15:38:20, possible memory leak in zlib compression at http://marc.info/?l=openssl-dev&m=121060672602371&w=2.
- ASA-2009-200: httpd security update (RHSA-2009-1075)
- BID-31681: RETIRED: Apple Mac OS X 2008-007 Multiple Security Vulnerabilities
- BID-31692: OpenSSL 'zlib' Compression Memory Leak Remote Denial of Service Vulnerability
- CVE-2008-1678: Memory leak in the zlib_stateful_init function in crypto/comp/c_zlib.c in libssl in OpenSSL 0.9.8f through 0.9.8h allows remote attackers to cause a denial of service (memory consumption) via multiple calls, as demonstrated by initial SSL client handshakes to the Apache HTTP Server mod_ssl that specify a compression algorithm.
- GLSA-200807-06: Apache: Denial of Service
- MDVSA-2009:124: apache
- RHSA-2009-1075: Moderate: httpd security update
- SA28046: Apache mod_imagemap Module Cross-Site Scripting Vulnerability
- SA32222: Apple Mac OS X Security Update Fixes Multiple Vulnerabilities
- SUSE-SR:2008:024: SUSE Security Summary Report
- USN-731-1: Apache vulnerabilities
- VUPEN/ADV-2008-2780: Apple Mac OS X Code Execution and Security Bypass Vulnerabilities
Reported:
Jul 09, 2008
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