CVE-2023-20028: Cisco Security Advisory: Cisco Secure Email Gateway, Cisco Secure Email and Web Manager, and Cisco Secure Web Appliance Cross-Site Scripting Vulnerabilities

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

  Details about the vulnerabilities are as follows:

  CVE-2023-20119: Cisco Secure Email and Web Manager Reflected XSS Vulnerability

  A vulnerability in the web-based management interface of Cisco AsyncOS Software for Cisco Secure Email and Web Manager could allow an unauthenticated, remote attacker to conduct an XSS attack against a user of the interface.

  This vulnerability is due to insufficient validation of user input. An attacker could exploit this vulnerability by persuading a user of an affected interface to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.

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

  Bug ID(s): CSCwe12624
  CVE ID: CVE-2023-20119
  Security Impact Rating (SIR): Medium
  CVSS Base Score: 6.1
  CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

  CVE-2023-20120: Cisco Secure Email and Web Manager, Cisco Secure Email Gateway, and Cisco Secure Web Appliance Stored XSS Vulnerability

  A vulnerability in the web-based management interface of Cisco AsyncOS Software for Cisco Secure Email and Web Manager, Cisco Secure Email Gateway, and Cisco Secure Web Appliance could allow an authenticated, remote attacker to conduct an XSS attack against a user of the interface.

  This vulnerability is due to insufficient validation of user input. An attacker could exploit this vulnerability by persuading a user of an affected interface to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.

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

  Bug ID(s): CSCwe14247, CSCwe14250, CSCwe18586
  CVE ID: CVE-2023-20120
  Security Impact Rating (SIR): Medium
  CVSS Base Score: 5.4
  CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

  CVE-2023-20028: Cisco Secure Email and Web Manager and Cisco Secure Web Appliance Stored XSS Vulnerability

  A vulnerability in the web-based management interface of Cisco AsyncOS Software for Cisco Secure Email and Web Manager and Cisco Secure Web Appliance could allow an authenticated, remote attacker to conduct an XSS attack against a user of the interface.

  This vulnerability is due to insufficient validation of user input. An attacker could exploit this vulnerability by persuading a user of an affected interface to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.

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

  Bug ID(s): CSCwd50087, CSCwd50094
  CVE ID: CVE-2023-20028
  Security Impact Rating (SIR): Medium
  CVSS Base Score: 4.8
  CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

• 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 tables 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 that are described in this advisory and which release included the fix for these vulnerabilities.

  Secure Email and Web Manager

Cisco AsyncOS Release

First Fixed Release for CVE-2023-20028, CVE-2023-20119, and CVE-2023-20120

14.3 and earlier

Migrate to a fixed release.

15.0

15.0.01 (Jul 2023)

**Secure Email Gateway**

 

Cisco AsyncOS Release

First Fixed Release for CVE-2023-20120

14.3 and earlier

Migrate to a fixed release.

15.0

15.0.01 (Jul 2023)

**Secure Web Appliance**

 

Cisco AsyncOS Release

First Fixed Release for CVE-2023-20028 and CVE-2023-20120

14.5 and earlier

Migrate to a fixed release.

15.0

15.0.0-3321

1\. This release is a Limited Deployment (LD) release. Customers who wish to upgrade to this release can contact Cisco TAC to provision this release to their appliances. The General Deployment (GD) release is currently under review and will be available in the future.

Cisco Secure Email Cloud Gateway, formerly Cisco Cloud Email Security, includes Cisco Secure Email Gateway and Cisco Secure Email and Web Manager devices as part of the service solution. Cisco provides regular maintenance of the products included in this solution. Customers can also request a software upgrade by contacting Cisco support.

In most cases, the software can be upgraded over the network by using the System Upgrade options in the web interface of the appliance. To upgrade a device by using the web interface, do the following:

1.  Choose **System Administration > System Upgrade**.
2.  Click **Upgrade Options**.
3.  Choose **Download and Install**.
4.  Choose the release to upgrade to.
5.  In the **Upgrade Preparation** area, choose the appropriate options.
6.  Click **Proceed** to begin the upgrade. A progress bar displays the status of the upgrade.

After the upgrade is complete, the device reboots.

The Cisco Product Security Incident Response Team (PSIRT) validates only the affected and fixed release information that is documented in this advisory.