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AUSCERT External Security Bulletin Redistribution
Cisco Prime Infrastructure and Evolved Programmable Network
Manager Remote Code Execution Vulnerability
7 November 2019
AusCERT Security Bulletin Summary
Product: Cisco Prime Infrastructure
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Root Compromise -- Remote/Unauthenticated
CVE Names: CVE-2019-15958
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Cisco Prime Infrastructure and Evolved Programmable Network Manager Remote Code
Advisory ID: cisco-sa-20191106-pi-epn-codex
First Published: 2019 November 6 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds availableCisco Bug IDs: CSCvp79419CSCvp79611
o A vulnerability in the REST API of Cisco Prime Infrastructure (PI) and
Cisco Evolved Programmable Network Manager (EPNM) could allow an
unauthenticated remote attacker to execute arbitrary code with root
privileges on the underlying operating system.
The vulnerability is due to insufficient input validation during the
initial High Availability (HA) configuration and registration process of an
affected device. An attacker could exploit this vulnerability by uploading
a malicious file during the HA registration period. A successful exploit
could allow the attacker to execute arbitrary code with root -level
privileges on the underlying operating system.
Note: This vulnerability can only be exploited during the HA registration
period. See the Details section for more information.
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:
o Vulnerable Products
This vulnerability affects Cisco PI Software releases prior to 3.4.2,
3.5.1, 3.6.0 Update 02 and Cisco EPNM releases prior to 3.0.2.
Note: Recent software changes have reduced the attack surface of this
vulnerability. Cisco PI releases 3.4.1, 3.5, 3.6, and EPNM Release 3.0.1
and later up to the First Fixed Release, require authentication in order to
exploit this vulnerability. All prior versions do not require
authentication to be exploited.
For information about which Cisco PI Software and Cisco EPNM releases are
resolved, see the Fixed Software section of this advisory.
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
o This vulnerability allows an attacker to upload malicious files to either
the primary or secondary device during the HA registration period, which is
one of the steps in the initial HA configuration. Once this HA registration
process completes and the pair goes into HA active and standby roles, this
vulnerability cannot be exploited.
The time it takes for the HA registration process to complete for PI is
dependent on a number of factors, but for a typical new HA deployment with
100 devices and a 1 Gbps link between peers, it will take approximately 25
minutes. For EPNM, this process typically takes 30 to 60 minutes.
o There are no workarounds that address this vulnerability.
o Cisco has released free software updates that address the vulnerability
described in this advisory. Customers may only install and expect support
for software versions and feature sets for which they have purchased a
license. By installing, downloading, accessing, or otherwise using such
software upgrades, customers agree to follow the terms of the Cisco
Additionally, customers may only download software for which they have a
valid license, procured from Cisco directly, or through a Cisco authorized
reseller or partner. In most cases this will be a maintenance upgrade to
software that was previously purchased. Free security software updates do
not entitle customers to a new software license, additional software
feature sets, or major revision upgrades.
When considering software upgrades , customers are advised to regularly
consult the advisories for Cisco products, which are available from the
Cisco Security Advisories and Alerts 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
Customers Without Service Contracts
Customers who purchase directly from Cisco but do not hold a Cisco service
contract and customers who make purchases through third-party vendors but
are unsuccessful in obtaining fixed software through their point of sale
should obtain upgrades by contacting the Cisco TAC:
Customers should have the product serial number available and be prepared
to provide the URL of this advisory as evidence of entitlement to a free
This vulnerability is fixed in the following Cisco PI Software releases and
3.6.0 Update 02
This vulnerability is fixed in the following Cisco EPNM releases and later:
Exploitation and Public Announcements
o The Cisco Product Security Incident Response Team (PSIRT) is not aware of
any malicious use of the vulnerability that is described in this advisory.
o Cisco would like to thank Steven Seeley (mr_me) of Source Incite for
reporting this vulnerability.
Cisco Security Vulnerability Policy
o To learn about Cisco security vulnerability disclosure policies and
publications, see the Security Vulnerability Policy . This document also
contains instructions for obtaining fixed software and receiving security
vulnerability information from Cisco.
| Version | Description | Section | Status | Date |
| 1.0 | Initial public release. | - | Final | 2019-November-06 |
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