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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.0250 Cisco Web Security Appliance Stored Cross-Site Scripting Vulnerability 21 January 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Web Security Appliance Publisher: Cisco Systems Operating System: Cisco Impact/Access: Cross-site Scripting -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2021-1271 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wsa-xss-RuB5WGqL - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Web Security Appliance Stored Cross-Site Scripting Vulnerability Priority: Medium Advisory ID: cisco-sa-wsa-xss-RuB5WGqL First Published: 2021 January 20 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvu22019 CSCvv27761 CVE Names: CVE-2021-1271 CWEs: CWE-79 Summary o A vulnerability in the web-based management interface of Cisco AsyncOS for Cisco Web Security Appliance (WSA) could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against a user of the interface of an affected device. The vulnerability exists because the web-based management interface does not properly validate user-supplied input. An attacker could exploit this vulnerability by inserting malicious data into a specific data field in an affected interface. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface. 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-wsa-xss-RuB5WGqL Affected Products o Vulnerable Products At the time of publication, this vulnerability affected Cisco WSA releases earlier than Release 12.5.1. 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 WSA releases 12.5.1 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 by Alvaro Gutierrez of Cisco 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. Related to This Advisory o Cross-Site Scripting URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wsa-xss-RuB5WGqL Revision History o +----------+---------------------------+----------+--------+--------------+ | Version | Description | Section | Status | Date | +----------+---------------------------+----------+--------+--------------+ | 1.0 | Initial public release. | - | Final | 2021-JAN-20 | +----------+---------------------------+----------+--------+--------------+ - --------------------------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 iQIVAwUBYAkjcONLKJtyKPYoAQhFKA/+NivaZklBfTmTP9kxDpHL9uecDlCRXbwN 4a8g26Dkcg5ZFpj2fmJT2TvbzIvqJ1d0aOk4IMmbBYE3bMLAlrkK+Rt8XMQVXxVS +K8h18dNOmMLKV9dzqXMehU42v8cRy0rxJlArA8/1kNskyIJmRnqSuq5Od2sCp0L Q0+FRUOQc/fzQEQxA6x+ocJxGv0Zbja9mYdB5KWuWH85WbRGCp5Gf6iPpuFpB11P lh5xGsgj9MQTOVZnibv+9THAvq5BTNWRReqA55NhXYrn0eOTGLTDLIhG79TA/gp7 40ZXwV+zVAlTJfDAho1eZfzqb923Unhfievt4Nr0xplAvtwCySA6re1nsuXH+kfk CShofeHpeWbBX9VlrGVXFBL50mXLde4GuhoJ39VX7q2PUu9OA4lBW1RgMRQ+f9qP i2YWERe6l2N+WEKGL71ijZir0Aho6guckMjPeGLKqeBcvOHMDJdRRMaJUq08RDZc w0bWXubkatoj0sz5n5fm/Q6nhjq8mtTJiS4ffc2yIy8OYil/0IdQN2hvg9X/yzWK pOgbawFW/vO5Hz6QX2SqZKWqq+78cx7gOM8mYSkBhZU48tEDAy+Mnd5w8p6uFFW2 qbQgQp9Fd72BT+V092rVn7vFP/CvoqM/NtSjyDq/FPF5mZHIfwnEbX4CyEqOe9ke 5Xr4LvT17To= =Dx6C -----END PGP SIGNATURE-----