Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2011.0575 Symantec Backup Exec Man-in-The-Middle 30 May 2011 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Symantec Backup Exec for Windows Servers Symantec Backup Exec 2010 Publisher: Symantec Operating System: Windows Impact/Access: Provide Misleading Information -- Existing Account Unauthorised Access -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2011-0546 Original Bulletin: http://www.symantec.com/business/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=2011&suid=20110526_00 - --------------------------BEGIN INCLUDED TEXT-------------------- Security Advisories Relating to Symantec Products - Symantec Backup Exec Man-in-The-Middle SYM11-006 May 26, 2011 Revision History None Severity Medium CVSS v2 : 6.5 Impact : 10 Exploitability : 2.5 CVSS v2 Vector : (AV: A/AC: H/Au: S/C: C/I: C/A: C) Overview Symantec Backup Exec is vulnerable to man-in-the-middle (MiTM) attack due to weakness in communication protocol implementation and lack of validation of identity information exchanged between media server and remote agent. Affected Products Product Symantec Backup Exec for Windows Servers Version 11.0, 12.0, 12.5 Build All Solution(s) Upgrade to Symantec Backup Exec 2010 R3 Product Symantec Backup Exec 2010 Version 13.0, 13.0 R2 Build All Solution(s) Upgrade to Symantec Backup Exec 2010 R3 Details Symantec was notified of a MiTM issue in the manner in which communication protocols are implemented between Backup Exec media server and remote agent. The issue is a result of lack of validation of remote agent identity information exchanged between media server and remote agent. Successful exploitation may result in privilege escalation enabling an attacker to execute post authentication NDMP commands. Successful exploitation requires the attacker to be an authorized user on the network or have unauthorized presence on an authorized system on the network. Symantec Response Symantec product engineers verified that the vulnerability exists in the versions of Backup Exec indicated above. Symantec has released Symantec Backup Exec 2010 R3 which establishes trust between Backup Exec remote agent and Backup Exec media server before exchanging any sensitive information. Symantec recommends customers upgrade to this release of Symantec Backup Exec which addresses the concern. Symantec knows of no exploitation of or adverse customer impact from this issue. Update Information Customers may obtain Symantec Backup Exec 2010 R3 from their normal support/ download locations. Best Practices As a part of normal best practices, Symantec strongly recommends: * Restrict access to administration or management systems to privileged users. * Restrict remote access, if required, to trusted/authorized systems only. * Run under the principle of least privilege where possible to limit the impact of exploit by threats. * Keep all operating systems and applications updated with the latest vendor patches. * Follow a multi-layered approach to security. Run both firewall and anti-malware applications, at a minimum, to provide multiple points of detection and protection to both inbound and outbound threats. * Deploy network and host-based intrusion detection systems to monitor network traffic for signs of anomalous or suspicious activity. This may aid in detection of attacks or malicious activity related to exploitation of latent vulnerabilities Credit Symantec credits Nibin Varghese of iViZ Security, for identifying this issue and working with us while Symantec fixed the issue. Reference Security Focus, http://www.securityfocus.com, has assigned Bugtraq ID (BID) 47824 to identify this issue for inclusion in the Security Focus vulnerability database. CVE: This issue is a candidate for inclusion in the CVE list (http://cve.mitre.org), which standardizes names for security problems. CVE-2011-0546 has been assigned to this issue. Symantec takes the security and proper functionality of our products very seriously. As founding members of the Organization for Internet Safety (OISafety), Symantec supports and follows responsible disclosure guidelines. Please contact secure@symantec.com if you feel you have discovered a security issue in a Symantec product. A member of the Symantec Product Security team will contact you regarding your submission to coordinate any required response. Symantec strongly recommends using encrypted email for reporting vulnerability information to secure@symantec.com. The Symantec Product Security PGP key can be found at the location below. Symantec has developed a Product Vulnerability Response document outlining the process we follow in addressing suspected vulnerabilities in our products. This document is available below. Copyright (c) by Symantec Corp. Permission to redistribute this alert electronically is granted as long as it is not edited in any way unless authorized by Symantec Product Security. Reprinting the whole or part of this alert in any medium other than electronically requires permission from secure@symantec.com 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. Symantec, Symantec products, Symantec Product Security, and secure@symantec.com are registered trademarks of Symantec Corp. and/or affiliated companies in the United States and other countries. All other registered and unregistered trademarks represented in this document are the sole property of their respective companies/owners. * Signature names may have been updated to comply with an updated IPS Signature naming convention. See http://www.symantec.com/business/support/index?page=content&id=TECH152794&key=54619&actp=LIST for more information. Last modified on: May 26, 2011 - --------------------------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 =========================================================================== 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 iD8DBQFN4xro/iFOrG6YcBERAosKAKDRrWcguHqK7E80lVqAI6mAUjhPBwCeOjVW EZmX3YVACldmSl8b1cKum98= =1e6i -----END PGP SIGNATURE-----