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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2006.0056 -- [Win] EMC Legato Networker nsrd.exe and nsrexed.exe Heap Overflow Vulnerabilities 18 January 2006 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: EMC Legato NetWorker nsrd.exe EMC Legato NetWorker nsrexecd.exe Publisher: iDEFENSE Operating System: Windows Server 2003 Windows XP Windows 2000 Windows NT Impact: Execute Arbitrary Code/Commands Access: Remote/Unauthenticated CVE Names: CAN-2005-3658 Original Bulletin: http://www.idefense.com/intelligence/vulnerabilities/display.php?id=373 http://www.idefense.com/intelligence/vulnerabilities/display.php?id=374 Comment: The following bulletin contains two security advisories relating to vulnerabilities in both EMC Legato Networker clients and servers running on Windows platforms. - --------------------------BEGIN INCLUDED TEXT-------------------- EMC Legato Networker nsrd.exe Heap Overflow Vulnerability iDefense Security Advisory 01.17.06 http://www.idefense.com/intelligence/vulnerabilities/display.php?id=373 January 17, 2006 I. BACKGROUND EMC Legato NetWorker is a cross-platform backup and recovery application. II. DESCRIPTION Remote exploitation of a heap overflow vulnerability in EMC Corp.'s Legato Networker allows attackers to execute arbitrary code on Windows platforms. The vulnerability specifically exists due to improper handling of malformed RPC requests to RPC program number 390109. When such a request is sent by an attacker, it is possible to overwrite portions of heap memory, thus leading to arbitrary code execution. III. ANALYSIS Successful exploitation allows a remote attacker to gain access to a targeted machine. As nsrd.exe is installed on backup client machines and server machines, an attacker may rapidly compromise a network using this vulnerability. IV. DETECTION iDefense has confirmed this vulnerability in Networker 7.2 build 172. All previous versions are suspected vulnerable. V. WORKAROUND iDefense is currently unaware of any workarounds for this issue. VI. VENDOR RESPONSE "Complete resolutions to the vulnerabilities are available today in NetWorker 7.1.4 and 7.3. EMC has created a hot-fix to protect against vulnerabilities for 7.2.1 customers. No fixes are planned for previous NetWorker releases." "These remedies are available for download at:" http://www.legato.com/support/websupport/product_alerts/011606_NW.htm VII. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CAN-2005-3658 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org), which standardizes names for security problems. VIII. DISCLOSURE TIMELINE 11/17/2005 Initial vendor notification 11/17/2005 Initial vendor response 01/17/2006 Coordinated public disclosure IX. CREDIT Jo Goossens is credited with the discovery of this vulnerability. Get paid for vulnerability research http://www.idefense.com/poi/teams/vcp.jsp Free tools, research and upcoming events http://labs.idefense.com X. LEGAL NOTICES Copyright © 2006 iDefense, Inc. Permission is granted for the redistribution of this alert electronically. It may not be edited in any way without the express written consent of iDefense. If you wish to reprint the whole or any part of this alert in any other medium other than electronically, please email customerservice@idefense.com for permission. Disclaimer: The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information. EMC Legato Networker nsrexecd.exe Heap Overflow Vulnerability iDefense Security Advisory 01.17.06 http://www.idefense.com/intelligence/vulnerabilities/display.php?id=374 January 17, 2006 I. BACKGROUND EMC Legato NetWorker is a cross-platform backup and recovery application. II. DESCRIPTION Remote exploitation of a heap overflow vulnerability in EMC Corp.'s Legato Networker allows attackers to execute arbitary code on windows platforms. The vulnerability specifically exists due to improper handling of malformed RPC requests to RPC program number 390113. When such a request is sent by an attacker, it is possible to overwrite portions of heap memory, thus leading to arbitrary code execution by way of a function pointer overwrite. If an attacker can populate memory so that his data is in a predictable location, arbitrary code execution is possible. It is possible to populate memory in several ways, including by utilizing memory leaks. III. ANALYSIS Successful exploitation allows a remote attacker to gain access to a targetted machine. As nsrd.exe is installed on backup client machines as well as server machines, an attacker may rapidly compromise a network using this vulnerability. IV. DETECTION iDefense has confirmed this vulnerability in Networker 7.2 build 172. All previous versions are suspected vulnerable. V. WORKAROUND iDefense is currently unaware of any workarounds for this issue. VI. VENDOR RESPONSE "Complete resolutions to the vulnerabilities are available today in NetWorker 7.1.4 and 7.3. EMC has created a hot-fix to protect against vulnerabilities for 7.2.1 customers. No fixes are planned for previous NetWorker releases." "These remedies are available for download at:" http://www.legato.com/support/websupport/product_alerts/011606_NW.htm VII. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CAN-2005-3658 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org), which standardizes names for security problems. VIII. DISCLOSURE TIMELINE 11/17/2005 Initial vendor notification 11/17/2005 Initial vendor response 01/17/2006 Coordinated public disclosure IX. CREDIT Jo Goossens is credited with the discovery of this vulnerability. Get paid for vulnerability research http://www.idefense.com/poi/teams/vcp.jsp Free tools, research and upcoming events http://labs.idefense.com X. LEGAL NOTICES Copyright © 2006 iDefense, Inc. Permission is granted for the redistribution of this alert electronically. It may not be edited in any way without the express written consent of iDefense. If you wish to reprint the whole or any part of this alert in any other medium other than electronically, please email customerservice@idefense.com for permission. Disclaimer: The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information. - --------------------------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 iQCVAwUBQ8242yh9+71yA2DNAQI0iQQAk8IZmg3Xga3rPKmqLV3gTwXwHoIktlBU ILKY9g072N5WXOh/TNmppqAi6wr78/sVq5ihAnIH+/vZ4X3eHpc4VEIi1H1v28JW Ua/D9iuR8lx4uEsIkYpRuE364bJ+szSbfHCylfeUK2tajOQAn9VnVKnTFkt+VTVH Ph8H0ecSwLU= =QaSy -----END PGP SIGNATURE-----