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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.3048 cisco-sa-20171129-ios-xr 30 November 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco IOS XR Publisher: Cisco Systems Operating System: Cisco Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2017-12355 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171129-ios-xr - --------------------------BEGIN INCLUDED TEXT-------------------- Medium Advisory ID: cisco-sa-20171129-ios-xr First Published: 2017 November 29 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvf76332 CVE-2017-12355 CWE-399 CVSS Score: Base 5.3 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:X/RC:X Summary A vulnerability in the Local Packet Transport Services (LPTS) ingress frame-processing functionality of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause one of the LPTS processes on an affected system to restart unexpectedly, resulting in a brief denial of service (DoS) condition. The vulnerability is due to incomplete LPTS frame validation by the affected software. An attacker could exploit this vulnerability by sending crafted XML requests to the management interface of an affected system. A successful exploit could allow the attacker to cause one of the LPTS processes on the affected system to restart unexpectedly, which would impact LPTS traffic and cause a brief DoS condition while the process restarts. 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-20171129-ios-xr Affected Products Vulnerable Products At the time of publication, this vulnerability affected all releases of Cisco IOS XR Software prior to the first fixed release. For the latest and most detailed 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. However, administrators may mitigate this vulnerability by removing the xml agent command configuration from the running configuration for an affected system. 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. Source This vulnerability was found during internal security testing. Cisco Security Vulnerability Policy To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco. URL https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-20171129-ios-xr Revision History Version Description Section Status Date 1.0 Initial public release. Final 2017-November-29 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: https://www.auscert.org.au/bulletins/ =========================================================================== 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 iQIVAwUBWh+Ceox+lLeg9Ub1AQjsIg//Ym0xElP/uJv/8TDvC6d/Vi2WlCdVao9y Nh81W4m/ST4cGppZCbsea+QJ6yi1bQdYL0KUjRV0nbBgHVEvrruHv87AMTtklB7d 6+63ry667NUkxTmP3Y7+Kym22DnuhguQlhoaLDkWCymu1A9NDUH0yGJs0RPsqg1a 7VD1gzazOjEUIKXzAe2iRyHrHyXbE5RwolmNI11k4M3beP8sh5bpk4zH/f+xjZ7j IxMuKJnC0KOMX4NSpv0D7639sTwUXPOqo2rIb+oQemilK6s0VTPKrdcmwyvbkG5B fIZVBu8prMTgsY+FizCleJd5ZWR+4nlW2Gl0Z3TDT7WY8ywwV2C6mqAfkiHcxFOc G/Uy77dOjL8oSMl0S0dg+xIF1ifEHdYm6TaMjipGso0QKKHHt3cwIb03crUwKywQ i5HPdhIOq3irX+sRye8QCc7cJGDz7ravTKMoeSpYVTJVolnVGptP861AZ4V96q1J RAYUKNfV1kFhNTt1tZIaTL3Vd40UpLdxex+wrkla9KkLdJYLgHWq3LmDxATZoeWE qLMJZGLGCfNndDxh8V2ByJzRdV2OK/EeWGGWoKlZbivU1EScYeO5rxfmO4llKkn1 2EgDDd+y6jP0lotshcb1ziHDH4jh8h5eJ1cUux3yvjIGPZNhz7sgx27TfPNw/WQL JDE+N2yLBfs= =7u/L -----END PGP SIGNATURE-----