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AUSCERT External Security Bulletin Redistribution
ESB-2019.3882.2
Cisco Small Business Smart and Managed Switches Vulnerabilities
30 January 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Small Business Smart and Managed Switches
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Cross-site Request Forgery -- Remote with User Interaction
Cross-site Scripting -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2019-12718 CVE-2019-12636
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191016-sbss-csrf
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191016-sbss-xss
Revision History: January 30 2020: Vendor issued final advisory update
October 18 2019: Initial Release
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Small Business Smart and Managed Switches Cross-Site Request Forgery
Vulnerability
Priority: High
Advisory ID: cisco-sa-20191016-sbss-csrf
First Published: 2019 October 16 16:00 GMT
Last Updated: 2020 January 27 14:22 GMT
Version 2.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvo26471, CSCvp35677
CVE-2019-12636
CWE-352
CVSS Score:
Base 8.1[blue-squar]Click Icon to Copy Verbose Score
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H/E:X/RL:X/RC:X
Summary
o A vulnerability in the web-based management interface of Cisco Small
Business Smart and Managed Switches could allow an unauthenticated, remote
attacker to conduct a cross-site request forgery (CSRF) attack on an
affected system.
The vulnerability is due to insufficient CSRF protections for the web-based
management interface on an affected device. An attacker could exploit this
vulnerability by persuading a user of the interface to follow a malicious
link. A successful exploit could allow the attacker to perform arbitrary
actions with the privilege level of the targeted user. If the user has
administrative privileges, the attacker could alter the configuration,
execute commands, or cause a denial of service (DoS) condition on an
affected device.
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://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20191016-sbss-csrf
Affected Products
o Vulnerable Products
This vulnerability affects the following Cisco products:
250 Series Smart Switches
350 Series Managed Switches
550X Series Stackable Managed Switches
Small Business 200 Series Smart Switches
Small Business 300 Series Managed Switches
Small Business 500 Series Stackable Managed Switches
For information about which software releases are vulnerable, 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.
Workarounds
o There are no workarounds that address this vulnerability.
Fixed Software
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
software license:
https://www.cisco.com/c/en/us/products/end-user-license-agreement.html
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
providers.
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:
https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html
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
upgrade.
Fixed Releases
Cisco fixed this vulnerability in Release 2.5.0.90 for the following Cisco
products:
? 250 Series Smart Switches
? 350 Series Managed Switches
? 550X Series Stackable Managed Switches
Cisco fixed this vulnerability in Release 1.4.11.02 for the following Cisco
products:
? Small Business 200 Series Smart Switches
? Small Business 300 Series Managed Switches
? Small Business 500 Series Stackable Managed Switches
Exploitation and Public Announcements
o 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
o Cisco would like to thank Marcin Mol of Securitum, Poland 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.
Subscribe to Cisco Security Notifications
o Subscribe
Action Links for This Advisory
o Snort Rule 51900
Snort Rule 51901
Snort Rule 51902
Snort Rule 51903
Snort Rule 51904
Snort Rule 51905
Snort Rule 51906
Snort Rule 51907
Cisco Small Business Smart and Managed Switches Cross-Site Request Forgery
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20191016-sbss-csrf
Revision History
o
+---------+-------------------------+--------------+--------+-----------------+
| Version | Description | Section | Status | Date |
+---------+-------------------------+--------------+--------+-----------------+
| | Added information about | Vulnerable | | |
| 2.0 | vulnerable products and | Products, | Final | 2020-January-27 |
| | related fixed software. | Fixed | | |
| | | Software | | |
+---------+-------------------------+--------------+--------+-----------------+
| 1.0 | Initial public release. | -- | Final | 2019-October-16 |
+---------+-------------------------+--------------+--------+-----------------+
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