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AUSCERT External Security Bulletin Redistribution
ESB-2021.0148
isco Firepower Management Center XML Entity Expansion Vulnerability
14 January 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco FMC Software
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-1267
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-xee-DFzARDcs
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Cisco Firepower Management Center XML Entity Expansion Vulnerability
Priority: Medium
Advisory ID: cisco-sa-fmc-xee-DFzARDcs
First Published: 2021 January 13 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvt63027
CVE Names: CVE-2021-1267
CWEs: CWE-776
CVSS Score:
4.3 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:X/RL:X/RC:X
Summary
o A vulnerability in the dashboard widget of Cisco Firepower Management
Center (FMC) Software could allow an authenticated, remote attacker to
cause a denial of service (DoS) condition on an affected device.
The vulnerability is due to improper restrictions on XML entities. An
attacker could exploit this vulnerability by crafting an XML-based widget
on an affected server. A successful exploit could cause increased memory
and CPU utilization, which could result in a DoS condition.
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-fmc-xee-DFzARDcs
Affected Products
o Vulnerable Products
At the time of publication, this vulnerability affected Cisco FMC Software
releases earlier than Release 6.6.1.
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
o There are no workarounds that address this vulnerability.
Fixed Software
o 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, Cisco FMC Software releases 6.6.1 and later
contained the fix for this vulnerability.
See the Details section in the bug ID(s) at the top of this advisory for
the most complete and current information.
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 This vulnerability was found during internal security testing.
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.
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-xee-DFzARDcs
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2021-JAN-13 |
+----------+---------------------------+----------+--------+--------------+
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