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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.2054 Cisco StarOS for ASR 5000 Series Routers: multiple vulnerabilities 17 August 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco StarOS for ASR 5000 Series Routers Publisher: Cisco Systems Operating System: Cisco Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Modify Arbitrary Files -- Existing Account Administrator Compromise -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2017-6775 CVE-2017-6774 CVE-2017-6773 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170816-staros1 https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170816-staros2 https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170816-staros3 Comment: This bulletin contains three (3) Cisco security advisories. - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Security Advisory Cisco StarOS for ASR 5000 Series Routers Command-Line Interface Security Bypass Vulnerability Medium Advisory ID: cisco-sa-20170816-staros1 First Published: 2017 August 16 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvd47722 CVSS Score: Base 6.4, Temporal 6.4 CVE-2017-6773 CWE-20 Summary A vulnerability in the CLI of Cisco ASR 5000 Series Aggregated Services Routers running the Cisco StarOS operating system could allow an authenticated, local attacker to bypass the CLI restrictions and execute commands on the underlying operating system. The vulnerability is due to insufficient input sanitization of user-supplied input at the CLI. An attacker could exploit this vulnerability by crafting a script on the device that will allow them to bypass built-in restrictions. An exploit could allow the unauthorized user to launch the CLI directly from a command shell. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170816-staros1 Affected Products Vulnerable Products This vulnerability affects Cisco StarOS for Cisco ASR 5000 Series Aggregated Services Routers. For information about affected software releases, consult the Cisco bug ID(s) at the top of this advisory. Products Confirmed Not Vulnerable No other Cisco products are currently known to be affected by this vulnerability. Workarounds There are no workarounds that address this vulnerability. Fixed Software For information about fixed software releases, consult the Cisco bug ID(s) at the top of this advisory. When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page, to determine exposure and a complete upgrade solution. In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers. Exploitation and Public Announcements The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory. URL https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170816-staros1 Revision History Version Description Section Status Date 1.0 Initial public release. -- Final 2017-August-16 Legal Disclaimer THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME. A standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products. - ------------------------------------------------------------------------------- Cisco Security Advisory Cisco StarOS for ASR 5000 Series Routers FTP Configuration File Modification Vulnerability Medium Advisory ID: cisco-sa-20170816-staros2 First Published: 2017 August 16 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvd47739 CVSS Score: Base 4.1, Temporal 4.1 CVE-2017-6774 CWE-264 Summary A vulnerability in Cisco ASR 5000 Series Aggregated Services Routers running the Cisco StarOS operating system could allow an authenticated, remote attacker to overwrite or modify sensitive system files. The vulnerability is due to the inclusion of sensitive system files within specific FTP subdirectories. An attacker could exploit this vulnerability by overwriting sensitive configuration files through FTP. An exploit could allow the attacker to overwrite configuration files on an affected system. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170816-staros2 Affected Products Vulnerable Products This vulnerability affects Cisco StarOS for Cisco ASR 5000 Series Aggregated Services Routers. Products Confirmed Not Vulnerable No other Cisco products are currently known to be affected by this vulnerability. Workarounds There are no workarounds that address this vulnerability. Fixed Software For information about fixed software releases, consult the Cisco bug ID(s) at the top of this advisory. When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page, to determine exposure and a complete upgrade solution. In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers. Exploitation and Public Announcements The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory. URL https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170816-staros2 Revision History Version Description Section Status Date 1.0 Initial public release. -- Final 2017-August-16 Legal Disclaimer THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME. A standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products. - ------------------------------------------------------------------------------- Cisco Security Advisory Cisco StarOS for ASR 5000 Series Routers Privilege Escalation Vulnerability Medium Advisory ID: cisco-sa-20170816-staros3 First Published: 2017 August 16 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvd47741 CVSS Score: Base 5.7, Temporal 5.7 CVE-2017-6775 CWE-264 Summary A vulnerability in the CLI of Cisco ASR 5000 Series Aggregated Services Routers running the Cisco StarOS operating system could allow an authenticated, local attacker to elevate their privileges to admin-level privileges. The vulnerability is due to incorrect permissions that are given to a set of users. An attacker could exploit this vulnerability by logging in to the shell of an affected device and elevating their privileges by modifying environment variables. An exploit could allow the attacker to gain admin-level privileges and take control of the affected device. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170816-staros3 Affected Products Vulnerable Products This vulnerability affects Cisco StarOS for Cisco ASR 5000 Series Aggregated Services Routers. For information about affected software releases, consult the Cisco bug ID(s) at the top of this advisory. Products Confirmed Not Vulnerable No other Cisco products are currently known to be affected by this vulnerability. Workarounds There are no workarounds that address this vulnerability. Fixed Software For information about fixed software releases, consult the Cisco bug ID(s) at the top of this advisory. When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page, to determine exposure and a complete upgrade solution. In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers. Exploitation and Public Announcements The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory. URL https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170816-staros3 Revision History Version Description Section Status Date 1.0 Initial public release. -- Final 2017-August-16 Legal Disclaimer THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME. A standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products. - --------------------------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 iQIVAwUBWZUxDYx+lLeg9Ub1AQhIYg/9HUGCuMK70ddvnKWDBkHRho8jg4yJze7l oyVANA3mLLQ6gMdN1hImbbSRuA8Gbey0xgJgEyfWeKXTOIgR/zfE9f65l53x5Jkv J2IEC475bmcato8jq7Jac9IobNRpqWc6xus+4WJDPqCPLosghh0qZJVdpfh53Rb2 y9sUT5kpFGpmstWAHVGdAWFBv/zOj/cQ2v4N9TWnRuDM3/rKyMxgM3ehAEBoMzkU FvNku0cka99c83OmY5pyN9tVd+2kNYN/sxrd+WCzkY1cv/eAgrIhZMyJ+HZDgz5R iqIsxwwU0K5ZmomBj4eiBCFoif95r85+dTyc0uS7P+4C0Aw07LmS6VM+oHZUD1yZ E/9hGfaRslhpznKcPmOWSGowdAyBaEbZPpe4vdjdL5Ge3dXSPCDNN1F+KlzjMHh0 lSJBzbZSUd7JFKCCwmMLMFB0OooPoMIqfnIbRehVSq0svhPPfvmH0cdJYgISB6vH FjOHHO28xS9S3wiayKPEncsdAv2QHuRjAEoRsXUWAbg11xamCmoHhbbO2kUeLv5L l8+hp42Jk5PCtUFKxsT+j+B9nb/Iy18jEz5bavJX4+hz0ZGzZ7HpX4WcBeoOgu3+ 6YUTtQS8KC1qIj0oHJkzTqmC2JfiP8xw9c4hAYTDJgLutM0k2Ww8u+LhymHtMTG7 5+WLxlPkmD8= =25VA -----END PGP SIGNATURE-----