Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.0837 Cisco Small Business SPA514G IP Phones SIP Denial of Service Vulnerability 14 March 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Small Business SPA514G IP Phones Publisher: Cisco Systems Operating System: Cisco Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2018-0389 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190313-sip - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Small Business SPA514G IP Phones SIP Denial of Service Vulnerability Priority: High Advisory ID: cisco-sa-20190313-sip First Published: 2019 March 13 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvc63989 CVE-2018-0389 CWE-399 CVSS Score: 7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:X/RL:X/RC:X Summary o A vulnerability in the implementation of Session Initiation Protocol (SIP) processing in Cisco Small Business SPA514G IP Phones could allow an unauthenticated, remote attacker to cause an affected device to become unresponsive, resulting in a denial of service (DoS) condition. The vulnerability is due to improper processing of SIP request messages by an affected device. An attacker could exploit this vulnerability by sending crafted SIP messages to an affected device. A successful exploit could allow the attacker to cause the affected device to become unresponsive, resulting in a DoS condition that persists until the device is restarted manually. Cisco has not released software updates that address this vulnerability. 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-20190313-sip Affected Products o Vulnerable Products This vulnerability affects Cisco Small Business SPA514G IP Phones that are running firmware release 7.6.2SR2 or earlier. Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. Cisco has confirmed that this vulnerability does not affect the following Cisco products: Other models of Small Business SPA51x IP Phones Small Business SPA50x IP Phones Small Business SPA52x IP Phones Workarounds o There are no workarounds that address this vulnerability. Fixed Software o Cisco has not released and will not release firmware updates to address the vulnerability described in this advisory. The Cisco Small Business SPA514G IP Phone has entered the end-of-life process. Refer to End-of-Sale and End-of-Life Announcement for the Cisco SPA514G 4-Line IP Phone and Field Notice FN70378 for further information. When considering a device migration, 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 new IP phones will be sufficient for their needs and current configurations will continue to be supported properly by the new product. 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 o 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 o This vulnerability was found during internal security testing. Cisco Security Vulnerability Policy o 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. Action Links for This Advisory o Snort Rule 47426 Cisco Small Business IP Phones Denial of Service URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190313-sip Revision History o +---------+--------------------------+---------+--------+----------------+ | Version | Description | Section | Status | Date | +---------+--------------------------+---------+--------+----------------+ | 1.0 | Initial public release. | - | Final | 2019-March-13 | +---------+--------------------------+---------+--------+----------------+ - --------------------------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 iQIVAwUBXIn2zGaOgq3Tt24GAQi1bA//d2eBLvXEb+CWD288wFEpfXIhuWypRqoZ I8bF4cbDW+cpVfDus/fbYDyr3VW5RiD/j5t48KUYp4nIeK9D5+NYncR+AUeZ6h5G T0XywlL9Pvy/N8CIRwkyf/KwSjlvaxgmcLtyUfGPlPUiVSA05B0PSUsA4XLIsLqJ wzHBDOwXdMGyu98dIdzkEG4xPIatlhP6ppLiUEekLHV588eCpUBtQWm7l8ACMoIS 75yVueSOxNO1lzQfkgHGQoEN7aGsEjvQ7y81QMJzGqynoawZEpi8QZ5DKB5cOi1A DqOmA2GOIAGjQ9M08PJqHp4DhwXqnR6dLkZBghdQgLJJ7PTi/nq6LOtzkwqehh8p vrua9uHqEdZNNdizK2tMU10VgyBVALO2m+6UTMp6NUcmrZPheKhYnkA7kmii6/JJ S0JiPRmpzzF6k3IbhUxxINfR/dSAlCbYP+yPBd8szGmfkfAiNkpQ8CLLInkJEtJA ZAku3rmTDxR3onfwhc609bb19xPdEjwgYkJMiuFSD2VF9W5fmxQDQxFOevKzgznP QsIv4n03SUnI64uY9ODsQHj6APDNbsZFLZs2zP5HACecJxn4AT45zWlhqQ8DOTGA OY+mYLOJQ5eVEsNlkLBdEWpmTJzHCY24EkSRv6NceTWSvxG68ORWhlbeb7h391Df oiIcZwM+yEI= =HwlU -----END PGP SIGNATURE-----