Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2009.1284 Multiple Security Vulnerabilities in Solaris TCP Implementation May Lead to a Denial of Service 14 September 2009 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: TCP Publisher: Sun Microsystems Operating System: Solaris OpenSolaris Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Mitigation CVE Names: CVE-2008-4609 Reference: ESB-2009.1263 Original Bulletin: http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-267088-1 - --------------------------BEGIN INCLUDED TEXT-------------------- Solution Type: Sun Alert Solution 267088 : Multiple Security Vulnerabilities in Solaris TCP (see tcp(7P)) Implementation May Lead to a Denial of Service (DoS) Condition Bug ID: 6759500 Product: Solaris 8 Operating System Solaris 9 Operating System Solaris 10 Operating System OpenSolaris Date of Workaround Release: 09-Sep-2009 Multiple Security Vulnerabilities in Solaris TCP (see tcp(7P)) Implementation May Lead to a Denial of Service (DoS) Condition 1. Impact Multiple security vulnerabilities exist in the Solaris TCP (see tcp(7P)) implementation due to the lack of resource control mechanisms. These issues may allow a remote privileged user with real IP addresses or subnet to easily cause certain network services on the affected system to become unresponsive, which is a type of Denial of Service (DoS). The extent of the impact depends on the network application. These issues are also referenced in the following documents: CERT-FI Advisory on the Outpost24 TCP Issues [FICORA #193744] at https://www.cert.fi/haavoittuvuudet/2008/tcp-vulnerabilities.html CVE CVE-2008-4609 at http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4609 Sun acknowledges with thanks, Jack C. Louis and Robert E. Lee of Outpost24, and CERT-FI for bringing these issues to our attention. 2. Contributing Factors These issues can occur in the following releases: SPARC Platform * Solaris 8 * Solaris 9 * Solaris 10 * OpenSolaris based upon builds snv_01 or later x86 Platform * Solaris 8 * Solaris 9 * Solaris 10 * OpenSolaris based upon builds snv_01 or later Notes: 1. Solaris 8 entered EOSL Phase 2 on 1 April 2009. Entitlement to patches developed on or after 1 April 2009 requires the purchase of the Solaris 8 Vintage Patch Service. See Note in section 5 for more details. 2. Solaris systems that are not listening to any connections, or which are configured to allow connections only from trusted hosts are not impacted by these issues. 3. OpenSolaris distributions may include additional bug fixes above and beyond the build from which it was derived. The base build can be derived as follows:- $ uname -v snv_111 3. Symptoms Should the described issues occur, network services on a system may become unresponsive. Services would recover with time once the attack is stopped. If a described issue occurs, Solaris commands such as netstat (see netstat(1M)) may indicate source IP addresses of the attack. 4. Workaround On Solaris 10 and OpenSolaris, ipfilter (see ipfilter(5)) may be used to block connections from source IP addresses of the attacks. 5. Resolution A final resolution is pending completion. Note: The READMEs of Solaris 8 patches developed on or after 1 April 2009 are available to all customers however Solaris 8 entered EOSL Phase 2 on April 1, 2009 and thus entitlement for these patches, including those that fix security vulnerabilities, requires the purchase of the Solaris 8 Vintage Patch Service. More information about the Solaris 8 Vintage Patch Service is available at: http://www.sun.com/service/eosl/Solaris8.html For more information on Security Sun Alerts, see Technical Instruction ID 213557. This Sun Alert notification is being provided to you on an "AS IS" basis. This Sun Alert notification may contain information provided by third parties. The issues described in this Sun Alert notification may or may not impact your system(s). Sun makes no representations, warranties, or guarantees as to the information contained herein. ANY AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN. This Sun Alert notification contains Sun proprietary and confidential information. It is being provided to you pursuant to the provisions of your agreement to purchase services from Sun, or, if you do not have such an agreement, the Sun.com Terms of Use. This Sun Alert notification may only be used for the purposes contemplated by these agreements. Copyright 2000-2009 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, CA 95054 U.S.A. All rights reserved - --------------------------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. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== 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 iD8DBQFKrY2lNVH5XJJInbgRAnoJAJ4yxgMtXSMBkhucJzCW2Y//hMZaXACfYGq1 bsow4M3s9kD3iizPDLEAHTc= =5Pi6 -----END PGP SIGNATURE-----