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AUSCERT External Security Bulletin Redistribution
ESB-2021.0249
Cisco Email Security Appliance, Cisco Content Security Management
Appliance, and Cisco Web Security Appliance Information
Disclosure Vulnerability
21 January 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Email Security Appliance (ESA)
Cisco Content Security Management Appliance (SMA)
Cisco Web Security Appliance (WSA)
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Access Confidential Data -- Remote/Unauthenticated
Unauthorised Access -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-1129
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-wsa-sma-info-RHp44vAC
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Email Security Appliance, Cisco Content Security Management Appliance,
and Cisco Web Security Appliance Information Disclosure Vulnerability
Priority: Medium
Advisory ID: cisco-sa-esa-wsa-sma-info-RHp44vAC
First Published: 2021 January 20 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvu89555 CSCvu93199 CSCvu93201
CVE Names: CVE-2021-1129
CWEs: CWE-201
Summary
o A vulnerability in the authentication for the general purpose APIs
implementation of Cisco Email Security Appliance (ESA), Cisco Content
Security Management Appliance (SMA), and Cisco Web Security Appliance (WSA)
could allow an unauthenticated, remote attacker to access general system
information and certain configuration information from an affected device.
The vulnerability exists because a secure authentication token is not
required when authenticating to the general purpose API. An attacker could
exploit this vulnerability by sending a crafted request for information to
the general purpose API on an affected device. A successful exploit could
allow the attacker to obtain system and configuration information from the
affected device, resulting in an unauthorized information disclosure.
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-esa-wsa-sma-info-RHp44vAC
Affected Products
o Vulnerable Products
At the time of publication, this vulnerability affected Cisco ESA, Cisco
SMA, and Cisco WSA if they supported general purpose API and the release
was earlier than the first fixed release.
The general purpose API was first supported in the following Cisco software
releases:
ESA Release 13.0
SMA Release 12.5
WSA Release 11.8
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.
Details
o The general purpose API and the information obtained by this API are
described in the General Purpose APIs chapter of the AsyncOS 13.0 API for
Cisco Email Security Appliances Getting Started Guide .
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, the following Cisco software releases contained
the fix for this vulnerability:
ESA releases 13.5.2 and later
SMA releases 13.8.0 and later
WSA releases 12.5.1 and later
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-esa-wsa-sma-info-RHp44vAC
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2021-JAN-20 |
+----------+---------------------------+----------+--------+--------------+
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You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
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/
===========================================================================
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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