OpenSSL libssl denial of service

openssl-libssl-dos (43948) The risk level is classified as MediumMedium 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

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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