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AUSCERT External Security Bulletin Redistribution
ESB-2020.3039
Cisco FXOS Software Buffer Overflow Vulnerability
4 September 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco FXOS Software
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Root Compromise -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-3545
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fxos-buffer-cSdmfWUt
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco FXOS Software Buffer Overflow Vulnerability
Priority: Medium
Advisory ID: cisco-sa-fxos-buffer-cSdmfWUt
First Published: 2020 September 2 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvd72523
CVE-2020-3545
CWE-119
Summary
o A vulnerability in Cisco FXOS Software could allow an authenticated, local
attacker with administrative credentials to cause a buffer overflow
condition.
The vulnerability is due to incorrect bounds checking of values that are
parsed from a specific file. An attacker could exploit this vulnerability
by supplying a crafted file that, when it is processed, may cause a
stack-based buffer overflow. A successful exploit could allow the attacker
to execute arbitrary code on the underlying operating system with root
privileges. An attacker would need to have valid administrative credentials
to exploit this vulnerability.
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-fxos-buffer-cSdmfWUt
Affected Products
o Vulnerable Products
At the time of publication, this vulnerability affected Cisco Firepower
4100 Series and Cisco Firepower 9300 Security Appliances if they were
running a Cisco FXOS Software release earlier than Release 2.3.1.58.
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 FXOS Software releases 2.3.1.58 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-fxos-buffer-cSdmfWUt
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2020-SEP-02 |
+----------+---------------------------+----------+--------+--------------+
- --------------------------END INCLUDED TEXT--------------------
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