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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.0600 Cisco StarOS Denial of Service Vulnerability 18 February 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco StarOS Publisher: Cisco Systems Operating System: Cisco Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2021-1378 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-StarOS-DoS-RLLvGFJj - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco StarOS Denial of Service Vulnerability Priority: Medium Advisory ID: cisco-sa-StarOS-DoS-RLLvGFJj First Published: 2021 February 17 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvu59686 CVE Names: CVE-2021-1378 CWEs: CWE-400 Summary o A vulnerability in the SSH service of the Cisco StarOS operating system could allow an unauthenticated, remote attacker to cause an affected device to stop processing traffic, resulting in a denial of service (DoS) condition. The vulnerability is due to a logic error that may occur under specific traffic conditions. An attacker could exploit this vulnerability by sending a series of crafted packets to an affected device. A successful exploit could allow the attacker to prevent the targeted service from receiving any traffic, which would lead to a DoS condition on the affected device. Cisco has 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-StarOS-DoS-RLLvGFJj Affected Products o Vulnerable Products At the time of publication, this vulnerability affected Cisco StarOS releases 21.9.0 through 21.19.10. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information. Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. Workarounds o There are no workarounds that address this vulnerability. Fixed Software o When considering software upgrades , customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories 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. Fixed Releases At the time of publication, Cisco StarOS releases 21.20.0 and later contained the fix for this vulnerability. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information. 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. URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-StarOS-DoS-RLLvGFJj Revision History o +----------+---------------------------+----------+--------+--------------+ | Version | Description | Section | Status | Date | +----------+---------------------------+----------+--------+--------------+ | 1.0 | Initial public release. | - | Final | 2021-FEB-17 | +----------+---------------------------+----------+--------+--------------+ - --------------------------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. 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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 iQIVAwUBYC3bDeNLKJtyKPYoAQiiRQ/9HqYH2NBcJ8/a3ZqgNbgCTpcQXEeQ0Pyl PTBM7+8iToHKkB9umCYUh+JSmYgvCg/xDFCS/YyI6RHGG+4FAr0/T5h4luJZfrl3 ch9RdRV0DlgXFJhgYQEN98tyo7tyTjGOwjLFRboFUR4xqobeUZq/GaszHdcKUVUK oNPD6OOxkDy82ZFSJq96AmtUkhsc5ZtLJ47F4u9rQVuhdJoboLXn/Htt8IXtvu44 tiqPo9LwbH3oi9JQteeyrA2Xc/IPIM+hEbKoeCuARXWB50tKE9bZZESsQUinXh30 5LJcENVGRt80lXyQOyN9xicOpnWY3Ve1a/GIabmcq4oNy0BgBaxUvJb+qvCSmMgc 3VhpNWqFu+X9H6UG2w0In5FJzjEACm53mYVEqduqjHgXcVJc2xgrYozZ6lh0aPEO 5ncaWRwQAMZtT6vzZsOb268KRWmF4vuoclnEazSuFQlM8A85IS7PSXnBP5VivZnX gGp/W9xMdn4pyBOiF2Bnmly9c5UXzbx97bwGTllelAIBF7VL6w1/MbU3TJAG/KOQ vlxmfZc5PiX/GB4p7YwagCqZ8fnsco0SKvShcuVpLjL/7uWMv147Is0HD2JgFGa8 jvsJPKkAXY3gTO7uitDDWabxoE9a/vMADahBp/KvkLq1bYOS2B7hPjB4X3RmikJG wzk8Z7mHLrM= =3swk -----END PGP SIGNATURE-----