Summary

• A vulnerability in the packaging of Cisco Adaptive Security Device Manager (ASDM) images and the validation of those images by Cisco Adaptive Security Appliance (ASA) Software could allow an authenticated, remote attacker with administrative privileges to upload an ASDM image that contains malicious code to a device that is running Cisco ASA Software.

  This vulnerability is due to insufficient validation of the authenticity of an ASDM image during its installation on a device that is running Cisco ASA Software. An attacker could exploit this vulnerability by installing a crafted ASDM image on the device that is running Cisco ASA Software and then waiting for a targeted user to access that device using ASDM. A successful exploit could allow the attacker to execute arbitrary code on the machine of the targeted user with the privileges of that user on that machine.

  Notes:

  • To successfully exploit this vulnerability, the attacker must have administrative privileges on the device that is running Cisco ASA Software.
  • Potential targets are limited to users who manage the same device that is running Cisco ASA Software using 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://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-asdm-sig-NPKvwDjm

Affected Products

• Vulnerable Products

  At the time of publication, this vulnerability affected Cisco devices if all of the following were true:

  • The device was running a Cisco ASA Software release earlier than Release 9.8.4.45, earlier than Release 9.12.4.50, earlier than Release 9.14.4.14, earlier than Release 9.16.3.19, earlier than Release 9.17.1.13, or earlier than Release 9.18.2.
  • The device was configured with a Cisco ASDM release earlier than Release 7.18.1.152.
  • The Cisco ASDM image was using a Cisco ASDM-IDM Launcher release earlier than Release 1.9(5).
  • The device was configured for HTTPS management access.

  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.

  Determine the HTTPS Management Access Configuration

  To identify the status of HTTPS management access, use the show running-config http CLI command. The following example shows the output of the show running-config http command on a device that has HTTPS management access enabled on the inside interface:

  asa# show running-config http          
  http server enable
  http 0.0.0.0 0.0.0.0 inside
  

  The HTTPS management access is disabled if one of the following is true:

  • The line starting with http server enable is missing.
  • The output of the show running-config http command does not include an HTTP access control list (ACL) that is associated with an interface.

  If the output does include an HTTP ACL, the exact value of the ACL does not affect the vulnerability status of the device. However, potential targets are limited to users who connect to the HTTPS management server of the device from an IP address that is permitted by the HTTP ACL.

  If the line starting with http server enable does not include a port, as in the example above, the default port 443 is used. The exact port value does not affect the vulnerability status of the device.

  Determine the ASDM Image Configuration

  To determine the configured ASDM image, use the show running-config asdm | include image CLI command. The following example shows the output of the show running-config asdm | include image command on a device that is configured to use the ASDM image named asdm-7181.bin on the disk0: filesystem:

  asa# show running-config asdm | include image
  asdm image disk0:/asdm-7181.bin

  Empty output of this command indicates that no ASDM image is configured.

  Products Confirmed Not Vulnerable

  Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability.

  Cisco has confirmed that this vulnerability does not affect the following Cisco products:

  • Firepower Management Center (FMC) Software
  • Firepower Threat Defense (FTD) Software
  • Next-Generation Intrusion Prevention System (NGIPS) Software

Workarounds

• There are no workarounds that address this vulnerability.

Fixed Software

• 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.

  Notes:

  • Updating both Cisco ASA Software and Cisco ASDM Software is required to fully fix this vulnerability.
  • After the ASDM image has been updated on a device that is running Cisco ASA Software, user machines that are running Cisco ASDM Software will automatically be updated with the new ASDM release when they first connect to the device.
  • Once user machines have successfully updated, they will be running Cisco ASDM-IDM Launcher Release 1.9(5) or later.

  Cisco ASA Software (CSCwb05291)
  

  Cisco ASA Release	First Fixed Release for This Vulnerability
  9.7 and earlier1	Migrate to a fixed release.
  9.8	9.8.4.45 (Sept 2022)
  9.91	Migrate to a fixed release.
  9.101	Migrate to a fixed release.
  9.12	9.12.4.50
  9.131	Migrate to a fixed release.
  9.14	9.14.4.14
  9.151	Migrate to a fixed release.
  9.16	9.16.3.19
  9.17	9.17.1.13
  9.18	9.18.2

  1. Cisco ASA Software releases 9.7 and earlier as well as releases 9.9, 9.10, 9.13, and 9.15 have reached end of software maintenance. Customers are advised to migrate to a supported release that includes the fix for this vulnerability.

   

  Cisco ASDM Software (CSCwb05264)
  

  Cisco ASDM Release	First Fixed Release for This Vulnerability
  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

• The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.

Source

• Cisco would like to thank Jake Baines of Rapid7 for reporting this vulnerability.

URL

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-asdm-sig-NPKvwDjm

Revision History

• Version	Description	Section	Status	Date
  1.2	Updated affected releases and added fixed releases.	Vulnerable Products, Fixed Software	Final	2022-AUG-17
  1.1	Updated affected releases and added fixed releases.	Summary, Vulnerable Products, Fixed Software	Final	2022-AUG-10
  1.0	Initial public release.	—	Final	2022-JUN-22

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