Summary

• Multiple vulnerabilities in Cisco Business 220 Series Smart Switches firmware could allow an attacker with Administrator privileges to access sensitive login credentials or reconfigure the passwords on the user account.

  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-sb-hardcoded-cred-MJCEXvX

Affected Products

• Vulnerable Products

  At the time of publication, these vulnerabilities affected Cisco Business 220 Series Smart Switches if they were running a vulnerable firmware release and had the web-based management interface enabled. The web-based management interface is enabled through both HTTP and HTTPS by default.

  Determine the Device Configuration

  To determine whether the web-based management interface is enabled through either HTTP or HTTPS, use the show running-config command on the device CLI. If both of the following lines are present in the configuration, the web-based management interface is disabled and the device is not affected:

  no ip http server
  no ip http secure server

  Any other output indicates that the web-based management interface is enabled on the device.

  In the web-based management interface, the HTTP service and HTTPS service are configured under Security > TCP/UDP Service.

  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-2021-34757: Cisco Business 220 Series Static Password Vulnerability

  A vulnerability in Cisco Business 220 Series Smart Switches firmware could allow an authenticated, physical attacker to obtain higher privileges on an affected device.

  This vulnerability is due to the use of a static password in all Cisco Business 220 Series Smart Switches firmware. An attacker with Administrator privileges could exploit this vulnerability by logging in to a serial interface and accessing encoded passwords. A successful exploit could allow the attacker to obtain and reconfigure user account passwords.

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

  Bug ID(s): CSCvy90709
  CVE ID: CVE-2021-34757
  Security Impact Rating (SIR): Medium
  CVSS Base Score: 5.5
  CVSS Vector: CVSS:3.1/AV:P/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

  CVE-2021-34744: Cisco Business 220 Series Static Key Vulnerability 

  A vulnerability in Cisco Business 220 Series Smart Switches firmware could allow an authenticated, remote attacker to access sensitive information on an affected device.

  This vulnerability is due to the use of a static cryptographic key in all Cisco Business 220 Series Smart Switches firmware images. An attacker with Administrator privileges could exploit this vulnerability by logging in to the web-based management interface and accessing encrypted passwords. A successful exploit could allow the attacker to obtain sensitive login credentials for other applications.

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

  Bug ID(s): CSCvy90713
  CVE ID: CVE-2021-34744
  Security Impact Rating (SIR): Medium
  CVSS Base Score: 4.9
  CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

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.

  Cisco Business 220 Series Smart Switches Firmware Release	First Fixed Release
  1.2.0.6 and earlier	1.2.1.2

  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 vulnerabilities that are described in this advisory.

Source

• Cisco would like to thank security researcher Jasper Lievisse Adriaanse for reporting these vulnerabilities.

URL

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sb-hardcoded-cred-MJCEXvX

Revision History

• Version	Description	Section	Status	Date
  1.0	Initial public release.	—	Final	2021-OCT-06

  Show Less

---