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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2009.1520 Multiple Security Vulnerabilities in the Common Unix Printing System (CUPS) Web Interface in OpenSolaris May Lead to Cross-Site Scripting (XSS) and HTTP Response Splitting Attacks 12 November 2009 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Common Unix Printing System (CUPS) Publisher: Sun Microsystems Operating System: OpenSolaris Impact/Access: Cross-site Scripting -- Remote/Unauthenticated Resolution: Mitigation CVE Names: CVE-2009-2820 Reference: ESB-2009.1502 Original Bulletin: http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-271169-1 - --------------------------BEGIN INCLUDED TEXT-------------------- Multiple Security Vulnerabilities in the Common Unix Printing System (CUPS) Web Interface in OpenSolaris May Lead to Cross-Site Scripting (XSS) and HTTP Response Splitting Attacks _________________________________________________________________ Category : Security Release Phase : Workaround Bug Id : 6893187 Product : OpenSolaris Date of Workaround Release : 10-Nov-2009 Multiple Security Vulnerabilities in the Common Unix Printing System (CUPS) Web Interface in OpenSolaris May Lead to Cross-Site Scripting (XSS) and HTTP Response Splitting Attacks 1. Impact The web interface of the Common Unix Printing System (CUPS) in versions 1.4.1 and earlier is impacted by multiple security vulnerabilities which may lead to Cross-Site Scripting (XSS) and HTTP Response Splitting Attacks. These vulnerabilities could allow an unprivileged local or remote user (depending on the CUPS configuration), to inject malicious client-side scripts or HTML into the CUPS web interface page. These issues are also described in the following document: CVE-2009-2820 at http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2820 2. Contributing Factors These issues can occur in the following releases: SPARC Platform * OpenSolaris based upon builds snv_87 or later x86 Platform * OpenSolaris based upon builds snv_87 or later Notes: 1. Solaris 8, 9, and 10 are not impacted by these issues. 2. 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_101 3. These vulnerabilities only affect OpenSolaris systems which have installed the CUPS package (SUNWcups). The SUNWcups package is not installed by default. To determine if the SUNWcups package is installed, the following command can be run: $ pkg info SUNWcups 4. These vulnerabilities only affect OpenSolaris systems which have configured and enabled CUPS for printing. To determine if the CUPS has been enabled, the following command can be run: $ svcs cups/in-lpd STATE STIME FMRI enabled 20:03:32 svc:/application/cups/in-lpd:default 5. These vulnerabilities only affect CUPS versions 1.4.1 and earlier. To determine the version of CUPS on the system the following command can be run: $ cups-config --version 1.4.1 3. Symptoms There are no predictable symptoms that would indicate the described vulnerabilities have been exploited. 4. Workaround To prevent these issues from occurring, the CUPS services may be configured to disable access to the CUPS web interface by doing the following: 1. Comment out the following line from '/etc/cups/cupsd.conf': Listen localhost:631 (or) Port 631 2. Restart the cups/scheduler services: # svcadm restart cups/in-lpd # svcadm restart cups/scheduler Binary relief is available via the normal support channels. Note: The fix for this issue will not result in a change of CUPS version to 1.4.2. 5. Resolution A final resolution is pending completion. 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 iD8DBQFK+1T9NVH5XJJInbgRAtIeAJ9fYLokDWcJsHvu2MZjAiarj+YRdACfcFv2 y7F3ghkVGDT9326Tam/6OIw= =/SyM -----END PGP SIGNATURE-----