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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2013.0471 Security Bulletin: SSL/TLS denial of service vulnerability in IBM Tivoli Directory Server 3 April 2013 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: IBM Tivoli Directory Server Publisher: IBM Operating System: Windows Server 2003 AIX Red Hat Enterprise Linux AS/ES/WS 4 Red Hat Enterprise Linux Server 5 SUSE Solaris HP-UX Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2013-0556 Original Bulletin: http://www-01.ibm.com/support/docview.wss?uid=swg21631687 - --------------------------BEGIN INCLUDED TEXT-------------------- Security Bulletin: SSL/TLS denial of service vulnerability in IBM Tivoli Directory Server Flash (Alert) Document information Tivoli Directory Server General Software version: 6.2, 6.3 Operating system(s): All Platforms Reference #: 1631687 Modified date: 2013-03-29 Abstract A denial of service vulnerability in the Tivoli Directory Server can cause a connection to fail to time-out. Content VULNERABILITY DETAILS: CVE ID: CVE-2013-0556 DESCRIPTION: A vulnerability in the Tivoli Directory Server can cause a connection to fail to time-out while waiting for incoming data from the client on a SSL/TLS connection. A successful attack could cause a delay or block access while trying to authenticate against applications and services that require this functionality. Non-SSL connections are not affected and only the Tivoli Directory Server server is impacted. The attack can be conducted over the internet. No specialized knowledge is necessary to conduct this attack. No authentication is required for the attack. CVSS: CVE-2013-0556 CVSS Base Score: 5.0 CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/83009 for the current score CVSS Environmental Score*: Undefined CVSS String: (AV:N/AC:L/AU:N/C:N/I:N/A:P) AFFECTED PLATFORMS: Running on all supported platforms: * Tivoli Directory Server versions 6.2.0.27 and 6.3.0.19 REMEDIATION: The recommended solution is to apply the fix for each named product as soon as practical. Please see below for information about the fixes available. Vendor Fix(es): For Tivoli Directory Server version 6.2.0.27 * Upgrade to Tivoli Directory Server version 6.2.0.29 For Tivoli Directory Server version 6.3.0.19 * Upgrade to Tivoli Directory Server version 6.3.0.21 If you are unable to upgrade, contact IBM Technical Support. Workaround(s): None Mitigation(s): None REFERENCES: Complete CVSS Guide On-line Calculator V2 CVE-2013-0556 http://xforce.iss.net/xforce/xfdb/83009 Tivoli Directory Server version 6.2.0.29 Tivoli Directory Server version 6.3.0.21 RELATED INFORMATION: IBM Secure Engineering Web Portal IBM Product Security Incident Response Blog *The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this alert. Note: According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBUVu2qu4yVqjM2NGpAQKlkA//ecrsmYWnM+ValqCUYoL5di/MgENw9VMB 6eGlpqphzGQpzBBdJGhuHVmr40Ar8sHJKY2/jy39K4PmuYVyj/VqufXajueXVoef HZGSof/lnqhjAcHx0GBP9O90jKny1ouBRe7wJOz1M7ZMeuJ03T1P+s2m36xSYGOc kgmj126pE6AIH6e+GFzHyKWuZ58SNHJ13kjxp8hDON2QuY8Rojd6opPSp9omDtFw 5eGphSnhO0mQ7ShVy8chkBWZXMCOyrpWh5V1wL3jpbBnFNi8mmFfDyu9AzGYTOnI O1Gv/dbCxxoVgE9NPwpWmVuRNRbAfhML0TNY4t+LpPQIHRF48Be8AMnUk73OnJ2G L4sQZTOSYkF5hUY4D33uYYxHTX6JxeOon37s/vP/lbTL7DNyBKLiRmFFt9ie0dts cuGB7w2qQNvlgjC+VNDr8PYc50XPCSBhTOufwimBXX8Z6Q5WVqp2rhsu+TnBYG+N ir/dlZ0NVYicyQ1LT4l6QT9Ifj6eBWhyP0Xz8LRBnb/p5JwKzH6mCQCn7CzHpZb5 2jJSfayVbqtfsoy7ePlo3eZBW3yXHWa6phTPgJ7fXy6yDqIJq4QrQ6iV296YR4gL e1wsFuqJpw5UVwTVC4ImaKcopEuADFyj6Q+jTy0ivu68NL4s+k82RpBNjV44VkHG 5po/kiEUoho= =WMi5 -----END PGP SIGNATURE-----