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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.0800 Cisco ESA, Cisco WSA, and Cisco SMA GUI Denial of Service Vulnerability 5 March 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Email Security Appliance Cisco Web Security Appliance Cisco Content Security Management Appliance Publisher: Cisco Systems Operating System: Cisco Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: None CVE Names: CVE-2020-3164 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cont-sec-gui-dos-nJ625dXb - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco ESA, Cisco WSA, and Cisco SMA GUI Denial of Service Vulnerability Priority: Medium Advisory ID: cisco-sa-cont-sec-gui-dos-nJ625dXb First Published: 2020 March 4 16:00 GMT Version 1.0: Final Workarounds: No workarounds availableCisco Bug IDs: CSCvq96943CSCvs33296CSCvs33306 CVE-2020-3164 CWE-20 CVSS Score: 5.3 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:X/RC:X Summary o A vulnerability in the web-based management interface of Cisco AsyncOS for Cisco Email Security Appliance (ESA), Cisco Web Security Appliance (WSA), and Cisco Content Security Management Appliance (SMA) could allow an unauthenticated remote attacker to cause high CPU usage on an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to improper validation of specific HTTP request headers. An attacker could exploit this vulnerability by sending a malformed HTTP request to an affected device. A successful exploit could allow the attacker to trigger a prolonged status of high CPU utilization relative to the GUI process(es). Upon successful exploitation of this vulnerability, an affected device will still be operative, but its response time and overall performance may be degraded. 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-cont-sec-gui-dos-nJ625dXb Affected Products o Vulnerable Products At the time of publication, this vulnerability affected the following Cisco products if they were running an affected software version: Cisco ESA and Cisco Cloud Email Security Release 13.0.0-392 and earlier Cisco WSA Release 12.0.1-268 and earlier Cisco SMA releases earlier than 13.6.0 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 and Alerts 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 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 Vijay Kumar D V 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. URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-cont-sec-gui-dos-nJ625dXb Revision History o +----------+---------------------------+----------+--------+--------------+ | Version | Description | Section | Status | Date | +----------+---------------------------+----------+--------+--------------+ | 1.0 | Initial public release. | - | Final | 2020-MAR-04 | +----------+---------------------------+----------+--------+--------------+ - --------------------------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 iQIVAwUBXmBZL2aOgq3Tt24GAQjD+g//TAsbziM2jxfd2COO+aWptbVvnkkqREvn M4FhRlxZ4tevwTJ7VgCpEpcFO21yeZaXRxDkv/FnvnUY8D7rREKlyt/KGH85Ur0y ruoFR82QxoJfMwI4VqMoEj8BOfsmNFa+Zyc4YhR/wZqBey5URVYM+T8IHP6ByMsY j+6K7Gm1AOUZlXapxpLoP8od7GisZcYmfIF7yM0gNj4mjVqgB5Lu/WBgbPFpnODZ iJUklQxea6L54qLX7FZgVB7L8UavSTvj7mNKw6WtQ/bSg1D7YY0fOpX0xbhpfgX/ YFAR+LUC67BDEByEgQym9kYqBLsBM/4cX2JD2LPenaYwlprvYbPq6FcMmqO7UFPB I/BRzpQVu8Wpgt3AJG7exOjOEBD+KG48+2rIm5thwOnAaNVYUD06eG2Rer8iiSR6 lSzLgEstFupRv+zdJ6sD0Mtzu3+CoYnuK110UWYvZTG9Mlv9l196w/Mc4kyxfq5w Inxyq3kPAk4OXACqYF2gO5AlXokKLSJifqwvf/x8aCH0q29ajdio90VHtRxXRMxS pV88AVJqYPVgOAFr3/Oi9L2zLftDRRWasHYu5YX9GhLlHa8s8Ew8dp/S9yjH/+s0 5ED/R7hZutbkkuKihh+DLouT8qmYzXJE5Zp7pGYsIURvFPiDAgBIfn32hhPoYTrg AyWhDsMaZNE= =7qEf -----END PGP SIGNATURE-----