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AUSCERT External Security Bulletin Redistribution
ESB-2024.2566.2
Cisco Adaptive Security Appliance and Firepower Threat Defense Software
Command Injection Vulnerability
26 April 2024
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AusCERT Security Bulletin Summary
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Product: Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software
Publisher: Cisco Systems
Operating System: Cisco
Resolution: Patch/Upgrade
CVE Names: CVE-2024-20358
Original Bulletin:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-cmd-inj-ZJV8Wysm
Comment: CVSS (Max): 6.0 CVE-2024-20358 (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N)
CVSS Source: Cisco Systems
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Revision History: April 26 2024: Bulletin was mistakenly set to alert.
April 26 2024: Initial Release
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Cisco Adaptive Security Appliance and Firepower Threat Defense Software Command
Injection Vulnerability
Priority: Medium
Advisory ID: cisco-sa-asaftd-cmd-inj-ZJV8Wysm
First Published: 2024 April 24 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCwi90040
CVE Names: CVE-2024-20358
CWEs: CWE-78
Summary
o A vulnerability in the Cisco Adaptive Security Appliance (ASA) restore
functionality that is available in Cisco ASA Software and Cisco Firepower
Threat Defense (FTD) Software could allow an authenticated, local attacker
to execute arbitrary commands on the underlying operating system with root
-level privileges. Administrator -level privileges are required to exploit
this vulnerability.
This vulnerability exists because the contents of a backup file are
improperly sanitized at restore time. An attacker could exploit this
vulnerability by restoring a crafted backup file to an affected device. A
successful exploit could allow the attacker to execute arbitrary commands
on the underlying Linux operating system as root .
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-asaftd-cmd-inj-ZJV8Wysm
For more information on the vulnerability that is described in this
advisory, see Cisco Event Response: Attacks Against Cisco Firewall
Platforms .
Affected Products
o Vulnerable Products
At the time of publication, this vulnerability affected Cisco products if
they were running a vulnerable release of Cisco ASA Software or FTD
Software. No specific configuration is required.
Note: Cisco FTD Software is affected only when lockdown mode has been
enabled to restrict Linux shell access. Lockdown mode is disabled by
default. When lockdown mode is disabled, Linux shell access, including root
-level shell access, is readily available through the expert CLI command on
devices that are running Cisco FTD Software. For more information on
lockdown mode, see the Cisco Secure Firewall Threat Defense Hardening Guide
.
For information about which Cisco software releases were vulnerable at the
time of publication, 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 and services listed in the Vulnerable Products section of
this advisory are known to be affected by this vulnerability.
Cisco has confirmed that this vulnerability does not affect Cisco Firepower
Management Center (FMC) Software.
Details
o This vulnerability affects the Cisco ASA restore CLI command that is
described in the Software and Configurations chapter of the Cisco ASA
Series General Operations CLI Configuration Guide .
The backup restore functionalities that are documented in the System
Management chapter of the Cisco Firepower Threat Defense Configuration
Guide for Firepower Device Manager and the Backup and Restore chapter of
the Firepower Management Center Configuration Guide are not 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.
Cisco ASA, FMC, and FTD Software
To help customers determine their exposure to vulnerabilities in Cisco ASA,
FMC, and FTD Software, Cisco provides the Cisco Software Checker . This
tool identifies any Cisco security advisories that impact a specific
software release and the earliest release that fixes the vulnerabilities
that are described in each advisory ("First Fixed"). If applicable, the
tool also returns the earliest release that fixes all the vulnerabilities
that are described in all the advisories that the Software Checker
identifies ("Combined First Fixed").
To use the tool, go to the Cisco Software Checker page and follow the
instructions. Alternatively, use the following form to search for
vulnerabilities that affect a specific software release. To use the form,
follow these steps:
1. Choose which advisories the tool will search-all advisories, only
advisories with a Critical or High Security Impact Rating (SIR) , or
only this advisory.
2. Choose the appropriate software.
3. Choose the appropriate platform.
4. Enter a release number-for example, 9.16.2.11 for Cisco ASA Software or
6.6.7 for Cisco FTD Software.
5. Click Check .
[2 ] [ ] [Critical,High,Medium]
[Only this advisory ] [Cisco ASA Software]
[Any Platform ]
[ ] [Check]
For instructions on upgrading an FTD device, see Cisco Firepower Management
Center Upgrade Guide .
Additional Resources
For help determining the best Cisco ASA, FMC, or FTD Software release, see
the following Recommended Releases documents. If a security advisory
recommends a later release, Cisco recommends following the advisory
guidance.
Cisco ASA Compatibility
Cisco Secure Firewall ASA Upgrade Guide
Cisco Secure Firewall Threat Defense Compatibility Guide
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 by Brian Stevens, Dany Rochefort, and Soumya
Kalahasti of Cisco 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.
Subscribe to Cisco Security Notifications
o Subscribe
Related to This Advisory
o Cisco Event Response: Attacks Against Cisco Firewall Platforms
URL
o https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-cmd-inj-ZJV8Wysm
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2024-APR-24 |
+----------+---------------------------+----------+--------+--------------+
Legal Disclaimer
o THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND
OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT
OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES
THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A standalone copy or paraphrase of the text of this document that omits the
distribution URL is an uncontrolled copy and may lack important information
or contain factual errors. The information in this document is intended for
end users of Cisco products.
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