Summary

• Multiple vulnerabilities in the web UI and API endpoints of Cisco Application Policy Infrastructure Controller (APIC) or Cisco Cloud APIC could allow a remote attacker to perform a command injection or file upload attack on an affected system.

  For more information about these vulnerabilities, see the Details section of this advisory.

  Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.

  This advisory is available at the following link:
  https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-capic-mdvul-HBsJBuvW

Affected Products

• Vulnerable Products

  At the time of publication, these vulnerabilities affected Cisco APIC and Cloud APIC.

  For information about which Cisco software releases are vulnerable, 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 these vulnerabilities.

Details

• The vulnerabilities are not dependent on one another. Exploitation of one of the vulnerabilities is not required to exploit the other vulnerability. In addition, a software release that is affected by one of the vulnerabilities may not be affected by the other vulnerability.

  Details about the vulnerabilities are as follows:

  CVE-2021-1580: Cisco APIC Command Injection Vulnerability

  A vulnerability in the web UI of Cisco APIC or an API endpoint of Cisco Cloud APIC could allow an authenticated, remote attacker to perform a command injection attack on an affected device.

  This vulnerability is due to improper input validation in the web UI and API endpoint. An attacker with high privileges could exploit this vulnerability by injecting crafted input during a specific command execution. A successful exploit could allow the attacker to execute arbitrary commands with root-level privileges on an affected device.

  Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

  Bug ID(s): CSCvw57577
  CVE ID: CVE-2021-1580
  Security Impact Rating (SIR): Medium
  CVSS Base Score: 6.5
  CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

  CVE-2021-1581: Cisco APIC File Upload Vulnerability

  A vulnerability in an API endpoint of Cisco APIC or Cisco Cloud APIC could allow an unauthenticated, remote attacker to upload files on an affected device.

  This vulnerability is due to improper access control. An attacker could exploit this vulnerability by using a specific API endpoint to upload files on an affected device. A successful exploit could allow the attacker to fill the upload partition of the affected device.

  Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

  Bug ID(s): CSCvw57581
  CVE ID: CVE-2021-1581
  Security Impact Rating (SIR): Medium
  CVSS Base Score: 6.5
  CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Workarounds

• There are no workarounds that address these vulnerabilities.

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 vulnerabilities described in this advisory and which release included the fix for these vulnerabilities.

  APIC Command Injection Vulnerability: CSCvw57577

  Cisco APIC and Cloud APIC Release	First Fixed Release for This Vulnerability
  Earlier than 3.2	Migrate to a fixed release.
  3.2	3.2(10e)
  4.0	Migrate to a fixed release.
  4.1	Migrate to a fixed release.
  4.2	4.2(6h)
  5.0	Migrate to a fixed release.
  5.1	5.1(3e)
  5.2	5.2(1g)

  APIC File Upload Vulnerability: CSCvw57581

  Cisco APIC and Cloud APIC Release	First Fixed Release for This Vulnerability
  Earlier than 3.2	Migrate to a fixed release.
  3.2	3.2(10f)
  4.0	Migrate to a fixed release.
  4.1	Migrate to a fixed release.
  4.2	4.2(7l)
  5.0	Migrate to a fixed release.
  5.1	Migrate to a fixed release.
  5.2	5.2(1g)

Exploitation and Public Announcements

• The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.

Source

• These vulnerabilities were found during internal security testing by Arthur Vidineyev of the Cisco Advanced Security Initiatives Group (ASIG).

URL

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-capic-mdvul-HBsJBuvW

Revision History

• Version	Description	Section	Status	Date
  1.1	Updated the vulnerability source.	Source	Final	2022-MAR-08
  1.0	Initial public release.	—	Final	2021-AUG-25

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