ESB-2021.1551 – [Cisco] Cisco Content Security Management Appliance (SMA): Root compromise – Existing account

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AUSCERT External Security Bulletin Redistribution

ESB-2021.1551
Cisco Content Security Management Appliance Privilege
Escalation Vulnerability
6 May 2021

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AusCERT Security Bulletin Summary
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Product: Cisco Content Security Management Appliance (SMA)
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Root Compromise — Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-1447

Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sma-priv-esc-JJ8zxQsC

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Cisco Content Security Management Appliance Privilege Escalation Vulnerability

Priority: Medium
Advisory ID: cisco-sa-sma-priv-esc-JJ8zxQsC
First Published: 2021 May 5 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvx14681
CVE Names: CVE-2021-1447
CWEs: CWE-269

Summary

o A vulnerability in the user account management system of Cisco AsyncOS for
Cisco Content Security Management Appliance (SMA) could allow an
authenticated, local attacker to elevate their privileges to root .

This vulnerability is due to a procedural flaw in the password generation
algorithm. An attacker could exploit this vulnerability by enabling
specific Administrator -only features and connecting to the appliance
through the CLI with elevated privileges. A successful exploit could allow
the attacker to execute arbitrary commands as root and access the
underlying operating system. To exploit this vulnerability, the attacker
must have valid Administrator credentials.

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-sma-priv-esc-JJ8zxQsC

Affected Products

o Vulnerable Products

At the time of publication, this vulnerability affected Cisco SMA, both
physical and virtual, releases earlier than Release 12.8.1-002 and Release
13.8.1-068.

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.

Cisco has confirmed that this vulnerability does not affect the following
Cisco products:

Web Security Appliance (WSA), both physical and virtual
Email Security Appliance (ESA), both physical and virtual

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 SMA releases 12.8.1-002 and later and
13.8.1-068 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 by Jakub Bros 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.

URL

o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sma-priv-esc-JJ8zxQsC

Revision History

o +———-+—————————+———-+——–+————–+
| Version | Description | Section | Status | Date |
+———-+—————————+———-+——–+————–+
| 1.0 | Initial public release. | – | Final | 2021-MAY-05 |
+———-+—————————+———-+——–+————–+

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NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT’s members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation’s
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author’s website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

https://www.auscert.org.au/bulletins/

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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
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