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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.2325.3 Cisco Adaptive Security Device Manager Remote Code Execution Vulnerability 29 August 2022 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Adaptive Security Device Manager Publisher: Cisco Systems Operating System: Cisco Resolution: Patch/Upgrade CVE Names: CVE-2021-1585 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asdm-rce-gqjShXW Comment: CVSS (Max): 7.5 CVE-2021-1585 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H) CVSS Source: Cisco Systems Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Revision History: August 29 2022: Vendor added Indicators of Compromise section July 27 2021: Vendor updated vulnerable products section July 8 2021: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Adaptive Security Device Manager Remote Code Execution Vulnerability Priority: Medium Advisory ID: cisco-sa-asdm-rce-gqjShXW First Published: 2021 July 7 16:00 GMT Last Updated: 2022 August 25 14:41 GMT Version 1.4: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvw79912 CVE Names: CVE-2021-1585 CWEs: CWE-94 Summary o A vulnerability in the Cisco Adaptive Security Device Manager (ASDM) Launcher could allow an unauthenticated, remote attacker to execute arbitrary code on a user's operating system. This vulnerability is due to a lack of proper signature verification for specific code exchanged between the ASDM and the Launcher. An attacker could exploit this vulnerability by leveraging a man-in-the-middle position on the network to intercept the traffic between the Launcher and the ASDM and then inject arbitrary code. A successful exploit could allow the attacker to execute arbitrary code on the user's operating system with the level of privileges assigned to the ASDM Launcher. A successful exploit may require the attacker to perform a social engineering attack to persuade the user to initiate communication from the Launcher to the ASDM. 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-asdm-rce-gqjShXW Affected Products o Vulnerable Products At the time of publication, this vulnerability affected Cisco ASDM releases earlier than Release 7.18.1.152. For information about which Cisco software releases were vulnerable at the time of publication, see the Fixed Software section of this advisory. 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. Details o An attacker could also leverage a man-in-the-middle position to persuade the user to retrieve an arbitrary file as part of the communication between the Launcher and the ASDM. This secondary drive-by download vulnerability has a CVSS score of 3.1 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N) and is addressed by the bug ID at the top of this advisory. Indicators of Compromise o Cisco ASDM releases 7.1.18.150 and later with Cisco ASDM-IDM Launcher releases 1.9(4) and later have the following warning message that appears when the Cisco ASDM-IDM Launcher detects that it is connecting to a release of Cisco ASDM that does not have the fix for this vulnerability: You are running a version of ASDM that does not include important security fixes. Please upgrade to 7.18(1.151) or later. Do you still want to continue For customers who see this message while connecting to a device that they believe is running a Cisco ASDM release that contains the fix for this vulnerability, it can be an indicator of an ongoing attack. Customers are advised to do the following: 1. Choose No to end the connection. 2. Verify that the value in the Device IP Address / Name field of the Cisco ASDM-IDM Launcher does indeed correspond to a known device that is running Cisco Adaptive Security Appliance (ASA) Software and Cisco ASDM Software in their network. 3. Log in to the listed device through the CLI and use the show version | include Device Manager command to determine the configured Cisco ASDM release. If this output reports a Cisco ASDM release earlier than Release 7.18.1.152, then the warning message is legitimate and an attack less likely. Cisco still recommends that customers upgrade to Cisco ASDM Release 7.18.1.152 or later to get the fix for this vulnerability. Upgrading would also prevent this warning message in future connection attempts. If this output reports Cisco ASDM Release 7.18.1.152 or later, then an ongoing attack is likely and should be further investigated. 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, the release information in the following table (s) was accurate. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information. The left column lists Cisco software releases, and the right column indicates whether a release was affected by the vulnerability that is described in this advisory and which release included the fix for this vulnerability. Cisco ASDM Release First Fixed Release 7.17 and earlier Migrate to a fixed release. 7.18 7.18.1.152 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 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 security researcher Malcolm Lashley for reporting these vulnerabilities. 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-asdm-rce-gqjShXW Revision History o +---------+---------------------+------------------+--------+-------------+ | Version | Description | Section | Status | Date | +---------+---------------------+------------------+--------+-------------+ | 1.4 | Added indicators of | Indicators of | Final | 2022-AUG-25 | | | compromise. | Compromise | | | +---------+---------------------+------------------+--------+-------------+ | | Updated affected | Summary, | | | | 1.3 | and first fixed | Vulnerable | Final | 2022-AUG-10 | | | release | Products, Fixed | | | | | information. | Software | | | +---------+---------------------+------------------+--------+-------------+ | | Added | Summary and | | | | 1.2 | clarifications | Fixed Software | Final | 2021-AUG-05 | | | about future fixes. | | | | +---------+---------------------+------------------+--------+-------------+ | | Updated the | Vulnerable | | | | 1.1 | vulnerable | Products | Final | 2021-JUL-13 | | | releases. | | | | +---------+---------------------+------------------+--------+-------------+ | 1.0 | Initial public | - | Final | 2021-JUL-07 | | | release. | | | | +---------+---------------------+------------------+--------+-------------+ - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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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). 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