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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.2128 Cisco Umbrella Open Redirect Vulnerability 18 June 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Umbrella Publisher: Cisco Systems Operating System: Cisco Impact/Access: Provide Misleading Information -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2020-3337 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-umbrella-open-redire-UgK9dWK4 - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Umbrella Open Redirect Vulnerability Priority: Medium Advisory ID: cisco-sa-umbrella-open-redire-UgK9dWK4 First Published: 2020 June 17 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvs93296 CVE-2020-3337 CWE-601 CVSS Score: 4.7 AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N/E:X/RL:X/RC:X Summary o A vulnerability in the web server of Cisco Umbrella could allow an unauthenticated, remote attacker to redirect a user to an undesired web page. The vulnerability is due to improper input validation of the URL parameters in an HTTP request that is sent to an affected device. An attacker could exploit this vulnerability by sending a crafted HTTP request that could cause the web application to redirect the request to a specified malicious URL. A successful exploit could allow the attacker to redirect a user to a malicious website. 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-umbrella-open-redire-UgK9dWK4 Affected Products o Vulnerable Products At the time of publication, this vulnerability affected Cisco Umbrella, which is cloud based. 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 plans to address this vulnerability in Cisco Umbrella, which is cloud based. No user action is required. Customers can determine the current remediation status or software version by using the Help function in the service GUI. Customers who need additional information 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 Cisco would like to thank Lukasz Korczyk of Epam Systems for reporting this vulnerability. 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-umbrella-open-redire-UgK9dWK4 Revision History o +----------+---------------------------+----------+--------+--------------+ | Version | Description | Section | Status | Date | +----------+---------------------------+----------+--------+--------------+ | 1.0 | Initial public release. | - | Final | 2020-JUN-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. 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 iQIVAwUBXusH1uNLKJtyKPYoAQg3SA//Rg0ebBO8ah9K0bSFk0QCs1wn3Xucs0Xo twac1h+2qYcNC8Gdfs7FcPVSlbKLZ+QGgkIFpfRcGhmFfmSGMv1Itmen9X3g6X/e abQXHVlJFc6RDBULHNkXLgtKcf7/6DeicTCYcBWVw/8kD1S4wVU3QXB2SHaG7lxl WZ7uSBFc7EgSrg7m63V2QlgmrtPe6ojmMHDhpEB541HL+q8DIyzaTGCaB5PgpzjB tFQ8qS3tkbMR8jXm0P1exvpuJeEItcm+xPVelUkyPrT8MWjwNY91TEf5OqS9bCez JaCAW2RO/PGjqYseYEoC0JhfSuqNYKjmgYD2xXJW7KTqUXGadPU2sZMvNR0efECP umjd3VeEHIX9pdgCSKFS8h74/jcYeBw2X4iHZi12loxaAoHJ3dEOEfXShbs7iWJD 4RXPRKcFoYZedWlGAdmmh61UnSh1sXg5M8CVpiRb7/ntd6w0zxJslq3OJJoXYY95 V6mfButqykS7cwvKp44Wv+jW19cqtcTcC4o4rkaxVZEnMsgE4OZXMA8VpeHGLNQX QYqPc+M6FI4cA/Sv0SEGmEjn17SZ5gj30qcE5D3rUjisKahsP0584nyfZEv+JnZD 9BW7jrFsIruTlRWBFYucWLfJAjbRLFsOGBCv5LOJPI22Sh59Ni5x0sawz3us6Tc9 3aqJYoGN0g8= =XKuj -----END PGP SIGNATURE-----