Summary

• A vulnerability in the restricted shell of Cisco Evolved Programmable Network (EPN) Manager, Cisco Identity Services Engine (ISE), and Cisco Prime Infrastructure could allow an authenticated, local attacker to identify directories and write arbitrary files to the file system.

  This vulnerability is due to improper validation of parameters that are sent to a CLI command within the restricted shell. An attacker could exploit this vulnerability by logging in to the device and issuing certain CLI commands. A successful exploit could allow the attacker to identify file directories on the affected device and write arbitrary files to the file system on the affected device. To exploit this vulnerability, the attacker must be an authenticated shell user.

  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-ade-xcvAQEOZ

Affected Products

• Vulnerable Products

  At the time of publication, this vulnerability affected the following Cisco products and firmware releases:

  Cisco Product	Vulnerable Releases
  EPN Manager	Earlier than Release 5.0.1
  ISE	Earlier than Release 2.6 Patch10 Earlier than Release 2.7 Patch4 Earlier than Release 3.0 Patch2 Earlier than Release 3.1
  Prime Infrastructure	Releases 3.5 and later Earlier than Release 3.9.0

  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 this vulnerability.

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.

  Cisco Product	Fixed Releases
  EPN Manager	5.0.1 and later
  ISE	2.6 Patch10 and later 2.7 Patch4 and later 3.0 Patch2 and later 3.1 and later
  Prime Infrastructure	3.9.0 and later

Exploitation and Public Announcements

• 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

• Cisco would like to thank employees of Conscia for reporting this vulnerability.

URL

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ade-xcvAQEOZ

Revision History

• Version	Description	Section	Status	Date
  1.2	Removed Prime Infrastructure 3.8.1 Update 2 as a fix because it hasn't been published.	Vulnerable Products, Fixed Releases	Final	2021-JUN-24
  1.1	Added ISE 2.6 Patch10 and later to vulnerable products and fixed releases.	Vulnerable Products, Fixed Releases	Final	2021-JUN-21
  1.0	Initial public release.	-	Final	2021-MAY-19

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