OpenSSL libssl denial of service
| openssl-libssl-dos (43948) |  Medium 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.
*CVSS:
| Base Score: | 5 |
| Access Vector: | Network |
| Access Complexity: | Low |
| Authentication: | None |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Partial |
| Temporal Score: | 3.7 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
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.
References:
- Apache Web site: Apache.
- Apple Web site: About Security Update 2008-007 .
- Gentoo Bugzilla Bug 222643: www-servers/apache <2.2.8-r3 memory leak with mod_ssl and zlib compression (CVE-2008-1678).
- OpenSSL Web site: OpenSSL: The Open Source toolkit for SSL/TLS.
- openssl-dev Mailing List, 2008-05-12 15:38:20: possible memory leak in zlib compression.
- SA50: Multiple SSL/TLS vulnerabilities in Reporter.
- 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
- MDVSA-2009:124-1: apache
- MDVSA-2009:323: apache
- MDVSA-2010:022: openssl
- 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
- SA42724: Blue Coat Reporter OpenSSL Multiple Vulnerabilities
- SA42733: Blue Coat Reporter OpenSSL Multiple Vulnerabilities
- SA44183: BlackBerry Enterprise Server 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
Platforms Affected:
- Apache HTTP Server 2.2.8
- Apple Mac OS X 10.5.5
- Apple Mac OS X Server 10.5.5
- BlueCoat Reporter 8.3.7.1
- BlueCoat Reporter 9.1.5.1
- BlueCoat Reporter 9.2.3.1
- Canonical Ubuntu 6.06 LTS
- Canonical Ubuntu 7.10
- Canonical Ubuntu 8.04 LTS
- Gentoo Linux
- MandrakeSoft Mandrake Linux 2008.0 X86_64
- MandrakeSoft Mandrake Linux 2008.0
- MandrakeSoft Mandrake Linux 2008.1 X86_64
- MandrakeSoft Mandrake Linux 2008.1
- MandrakeSoft Mandrake Linux Corporate Server 4.0
- MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
- Mandriva Enterprise Server 5 X86_64
- Mandriva Enterprise Server 5
- Mandriva Linux 2009.0 X86_64
- Mandriva Linux 2009.0
- Mandriva Linux 2009.1
- Mandriva Linux 2009.1 X86_64
- Mandriva Linux 2010 X86_64
- Mandriva Linux 2010
- OpenSSL OpenSSL 0.9.8f
- OpenSSL OpenSSL 0.9.8g
- OpenSSL OpenSSL 0.9.8h
- RedHat Enterprise Linux 5 Client
- RedHat Enterprise Linux 5
- RedHat Enterprise Linux 5 Client Workstation
- RedHat Enterprise Linux 5.3.z EUS
- RedHat Enterprise Linux Long Life 5.3
Reported:
Jul 09, 2008
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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 IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.