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AUSCERT External Security Bulletin Redistribution
ESB-2020.0801.2
Cisco Email Security Appliance Uncontrolled Resource
Exhaustion Vulnerability
6 March 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Email Security Appliances
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Denial of Service -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
Resolution: None
CVE Names: CVE-2020-3181
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-resource-exhaust-D7RQAhnD
Revision History: March 6 2020: Updated fixed and vulnerable release information
March 5 2020: Initial Release
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Email Security Appliance Uncontrolled Resource Exhaustion Vulnerability
Priority: Medium
Advisory ID: cisco-sa-esa-resource-exhaust-D7RQAhnD
First Published: 2020 March 4 16:00 GMT
Last Updated: 2020 March 5 15:50 GMT
Version 1.1: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvr96489
CVE-2020-3181
CWE-400
CVSS Score:
6.5 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:X/RL:X/RC:X
Summary
o A vulnerability in the malware detection functionality in Cisco Advanced
Malware Protection (AMP) in Cisco AsyncOS Software for Cisco Email Security
Appliances (ESAs) could allow an unauthenticated remote attacker to exhaust
resources on an affected device.
The vulnerability is due to insufficient control over system memory
allocation. An attacker could exploit this vulnerability by sending a
crafted email through the targeted device. A successful exploit could allow
the attacker to cause an email attachment that contains malware to be
delivered to a user and cause email processing delays.
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-resource-exhaust-D7RQAhnD
Affected Products
o Vulnerable Products
At the time of publication, this vulnerability affected Cisco AsyncOS
Software for Cisco ESA releases earlier than Release 13.0.0.
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 and Alerts 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 AsyncOS Software for Cisco ESA releases
13.0.0 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 the resolution of a Cisco TAC support
case.
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-resource-exhaust-D7RQAhnD
Revision History
o +---------+-------------------+------------------+--------+---------------+
| Version | Description | Section | Status | Date |
+---------+-------------------+------------------+--------+---------------+
| | Updated fixed and | Summary, | | |
| 1.1 | vulnerable | Vulnerable | Final | 2020-March-05 |
| | release | Products, Fixed | | |
| | information. | Releases | | |
+---------+-------------------+------------------+--------+---------------+
| 1.0 | Initial public | - | Final | 2020-March-04 |
| | release. | | | |
+---------+-------------------+------------------+--------+---------------+
- --------------------------END INCLUDED TEXT--------------------
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