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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2023.0170 Cisco BroadWorks Application Delivery Platform and Xtended Services Platform Denial of Service Vulnerability 12 January 2023 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco BroadWorks Application Delivery Platform Cisco Xtended Services Platform Publisher: Cisco Systems Operating System: Cisco Resolution: Patch/Upgrade CVE Names: CVE-2023-20020 Original Bulletin: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-bw-dos-HpkeYzp Comment: CVSS (Max): 8.6 CVE-2023-20020 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H) CVSS Source: Cisco Systems Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco BroadWorks Application Delivery Platform and Xtended Services Platform Denial of Service Vulnerability Priority: High Advisory ID: cisco-sa-bw-dos-HpkeYzp First Published: 2023 January 11 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCwd50136 CVE Names: CVE-2023-20020 Summary o A vulnerability in the Device Management Servlet application of Cisco BroadWorks Application Delivery Platform and Cisco BroadWorks Xtended Services Platform could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper input validation when parsing HTTP requests. An attacker could exploit this vulnerability by sending a sustained stream of crafted requests to an affected device. A successful exploit could allow the attacker to cause all subsequent requests to be dropped, resulting in a DoS condition. 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://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-bw-dos-HpkeYzp Affected Products o Vulnerable Products This vulnerability affects Cisco BroadWorks Application Delivery Platform Device Management Software and Cisco BroadWorks Xtended Services Platform. For information about which Cisco software releases are vulnerable, see the Fixed Software section of this advisory. 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 Cisco has released free software updates that address the vulnerability described in this advisory. Customers with service contracts that entitle them to regular software updates should obtain security fixes through their usual update channels. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license: https://www.cisco.com/c/en/us/products/end-user-license-agreement.html Additionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades. The Cisco Support and Downloads page on Cisco.com provides information about licensing and downloads. This page can also display customer device support coverage for customers who use the My Devices tool. 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. Customers Without Service Contracts Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: https://www.cisco.com/c /en/us/support/web/tsd-cisco-worldwide-contacts.html Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade. Fixed Releases In the following tables, the left column lists Cisco software releases. The right column indicates whether a release is affected by the vulnerability that is described in this advisory and the first release that includes the fix for this vulnerability. Customers are advised to upgrade to an appropriate fixed software release as indicated in this section. Cisco BroadWorks Application Delivery Platform Device First Fixed Release Management Release 22.0 ADP_Rel_2022.11_1.273 dms_2022.11_1.273 Cisco BroadWorks Xtended Services Platform First Fixed Release Release 22.0 Migrate to a fixed release. 23.0 AP.xsp.23.0.1075.ap384245 AP.platform.23.0.1075.ap384245 The Cisco Product Security Incident Response Team (PSIRT) validates only the affected and fixed release information that is documented in this advisory. Exploitation and Public Announcements o The Cisco 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 the resolution of a Cisco TAC support case. 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. Subscribe to Cisco Security Notifications o Subscribe Related to This Advisory o URL o https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-bw-dos-HpkeYzp Revision History o +----------+---------------------------+----------+--------+--------------+ | Version | Description | Section | Status | Date | +----------+---------------------------+----------+--------+--------------+ | 1.0 | Initial public release. | - | Final | 2023-JAN-11 | +----------+---------------------------+----------+--------+--------------+ Legal Disclaimer o 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: https://auscert.org.au/gpg-key/ iQIVAwUBY7+Q/ckNZI30y1K9AQgBCA/+L11ia2prTSxcpDj+upcPm8eSc4daz5Km n4QpjTDePa7s9S/ccz7EXvT03MxeIDXVPu0LfA9SvHs8g9ma0cL5jB5M/KAiSF3Q BN2ftRL3aia2jqrmUbidYSVMMFkBzpDn/cw8fU6BTgNOrfNYhfQYophljMBoCBAH 3Q/+4IvwgQa9mH8Q2BHbmGsog81WPCC/wCz2iEiXb4Vc9a19gOjFKmyvue5+j5Xw qd+xYYcZ5E3nLHwntLSNXYJjRQszKXPTHgViqHwbwAv1BuE0NXDFEJ4f16D1gat2 JA7+Zzr7Xr6bpAV+PmAi6MQThv/RNIUZXxL/OQymRCEOHEsaPDCO/eqKGwNVVX38 itjyblUiooKwrnkxK/4xyJ8ugScAOkW7Sai8czcDVlHPIVd3mlye62KGXlMkUJvp mDoZWxZILCGTbKrWUKlbKH1BuQVlb7Yy9LFarvEP3ga1o8rHAhdP6o+qMxA1Re6w +o10/5+pgOnKcvgczUkVpq7zTTy3E633QcB1ls2+wg4ebFlhefP+FeUtPuw+3SR4 mJFC9NjJKjAjmzZIeIM6++uhzZeudDVeuy52h+N+4J0v/iCXIZFHsexJoKeeox5s JGf0gTnV6csMQT++GYwaLowtPcB6QKiCfPtjvj9HiQzcH2rMbVjnEW6havYbCWLh biqw48edNOY= =3Ahb -----END PGP SIGNATURE-----