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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2015.1743 Cisco Nexus Devices Python Subsystem Local Privilege Escalation Vulnerabilities 1 July 2015 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco NX-OS Software Publisher: Cisco Systems Operating System: Cisco Impact/Access: Root Compromise -- Existing Account Resolution: Mitigation CVE Names: CVE-2015-4234 Original Bulletin: http://tools.cisco.com/security/center/viewAlert.x?alertId=39571 - --------------------------BEGIN INCLUDED TEXT-------------------- Vulnerability Alert Cisco Nexus Devices Python Subsystem Local Privilege Escalation Vulnerabilities Threat Type: CWE-264: Permissions, Privileges, and Access Control IntelliShield ID: 39571 Version: 1 First Published: 2015 June 30 22:03 GMT Last Published: 2015 June 30 22:03 GMT Port: Not available CVE: CVE-2015-4234 Urgency: Unlikely Use Credibility: Confirmed Severity: Mild Damage CVSS Base: 6.8 CVSS Version 2.0 CVSS Temporal: 6.5 Version Summary: Cisco Nexus devices contain multiple vulnerabilities that could allow an authenticated, local attacker to gain elevated privileges on a targeted system. Updates are not available. Description Multiple privilege escalation vulnerabilities in the Python subsystem of Cisco Nexus devices running Cisco NX-OS Software could allow an authenticated, local attacker to gain elevated privileges. The vulnerabilities are due to insufficient hardening of the operating system on which NX-OS is based. An attacker who has sufficient privileges to execute arbitrary Python scripts on an affected device could use this access to obtain root privileges. Cisco has confirmed the vulnerability; however, software updates are not available. Warning Indicators At the time this alert was first published, Cisco Nexus devices running Cisco NX-OS Software releases 6.0(2) and 6.2(2) were vulnerable. Later releases of Cisco NX-OS Software may also be vulnerable. IntelliShield Analysis To exploit these vulnerabilities, an attacker must have local access and authenticate to the targeted device. These requirements could limit the possibility of a successful exploit. Cisco would like to thank Jens Krabbenhoeft for discovering and reporting this vulnerability. Vendor Announcements Cisco has released bug IDs CSCun02887, CSCur00115, and CSCur00127 for registered users, which contains additional details and an up-to-date list of affected product versions. Impact An authenticated, local attacker could exploit these vulnerabilities to gain root privileges on an affected device. A successful exploit could result in a complete system compromise. Technical Information The vulnerabilities are due to insufficient hardening of the underlying operating system on a Cisco Nexus device running an affected version of Cisco NX-OS Software. An authenticated, local attacker who has sufficient privileges to execute arbitrary Python scripts on a targeted device could use this access to obtain root privileges. A successful exploit could result in a complete system compromise. Safeguards Administrators are advised to contact the vendor regarding future updates and releases. Administrators are advised to allow only trusted users to access local systems. Administrators are advised to allow only privileged users to access administration or management systems. Administrators are advised to monitor affected systems. Patches/Software Software updates are not available. Alert History Initial Release Product Sets The security vulnerability applies to the following combinations of products. Primary Products: Cisco Cisco MDS 9000 NX-OS Software 6.2 (2) | 6.0 (2) Cisco Cisco MDS SAN-OS Software 6.0 (2) | 6.2 (2) Associated Products: N/A Alerts and bulletins on the Cisco Security Intelligence Operations Portal are highlighted by analysts in the Cisco Threat Operations Center and represent a subset of the comprehensive content that is available through Cisco Security IntelliShield Alert Manager Service. This customizable threat and vulnerability alert service provides security staff with access to timely, accurate, and credible information about threats and vulnerabilities that may affect their environment. LEGAL DISCLAIMER The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME. - --------------------------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. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBVZN9Y36ZAP0PgtI9AQJoTw//UgddX+XUXs7T9M4ZTeALF7Bx5k2k//jj 016HMx9LzuTHOPi4torCynUUzSVrDvEbqnoY55yy0mjU0Ui3vWt0LpeXUnTSRzCG /prjYWhG+PqDeIcDRxIy5Q7mDN4OL8z02lML0QAGGuIgOM+4MZl68tsemfnmA+QC lsOgdaC3d0HQHro0DPS4XNdV5DXWbZTeEsJgqNtJFWILJdtHMavzc0xsgT+9GVIs 27PTZX44qiZNnYXeDCQBtYqIlDEbFPvL0Qwnnqy3Rs5gZQDFWdqLQMEGthoQ0Qb7 e9uMI9PVGDwy4Cx1tnQmFsHrevUg2ehR0BeEzmQWr0LJh9nnACbfgflGlIR5jj5N F/pm4RwEZfjc4LWG8mOx1Lmx4c5dMi/vYn4/pHWQTwDehfoyhNYXyUmNQylmyhBw 1v92061zfZhHxj1a379LL725REXwnzNVtaobr4GSlpTXzpl9WT7cAT/Mu0b7vReZ acSBSJnPlOk9J/G8T7qkZus9h4IMJqh47+iASBbBOb1JfzB78i5iXiWOqg3lj1uR tbf4Wm9ntQ8OfZbLCB4xFNmF8yiN87FaoQO6soQT+aQxPHL2a98c2Qy131nr7kgw mTLs6m+Q1lGozjd3Rf/AAC2dyIteX3gHOD01z71c6rdU9fooK8gma4ryetcr75HH lPrR3Tsin8M= =2S08 -----END PGP SIGNATURE-----