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AUSCERT External Security Bulletin Redistribution
ESB-2022.1492
Multiple Cisco Security Products Simple Network Management
Protocol Service Denial of Service Vulnerability
7 April 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Email Security Appliance (ESA)
Cisco Secure Email and Web Manager
Cisco Web Security Appliance (WSA)
Publisher: Cisco Systems
Operating System: Cisco
Resolution: Patch/Upgrade
CVE Names: CVE-2022-20675
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ESA-SNMP-JLAJksWK
Comment: CVSS (Max): 5.3 CVE-2022-20675 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
CVSS Source: Cisco Systems
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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Multiple Cisco Security Products Simple Network Management Protocol Service
Denial of Service Vulnerability
Priority: Medium
Advisory ID: cisco-sa-ESA-SNMP-JLAJksWK
First Published: 2022 April 6 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCwa06167 CSCwa07400 CSCwa08629
CVE Names: CVE-2022-20675
CWEs: CWE-248
Summary
o A vulnerability in the TCP/IP stack of Cisco Email Security Appliance
(ESA), Cisco Web Security Appliance (WSA), and Cisco Secure Email and Web
Manager, formerly Security Management Appliance, could allow an
unauthenticated, remote attacker to crash the Simple Network Management
Protocol (SNMP) service, resulting in a denial of service (DoS) condition.
This vulnerability is due to an open port listener on TCP port 199. An
attacker could exploit this vulnerability by connecting to TCP port 199. A
successful exploit could allow the attacker to crash the SNMP service,
resulting in a DoS condition.
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-SNMP-JLAJksWK
Attention : Simplifying the Cisco portfolio includes the renaming of
security products under one brand: Cisco Secure. For more information, see
Meet Cisco Secure .
Affected Products
o Vulnerable Products
At the time of publication, this vulnerability affected the following Cisco
products if they were running a vulnerable release of Cisco AsyncOS
Software:
ESA
Secure Email and Web Manager
WSA
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 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, the release information in the following table
(s) was accurate. See the Details section in the bug ID(s) at the top of
this advisory for the most complete and current information.
The left column lists Cisco software releases, and the right column
indicates whether a release was affected by the vulnerability described in
this advisory and which release included the fix for this vulnerability.
Email Security Appliance (ESA)
Cisco AsyncOS Software Release First Fixed Release
13.5 and earlier. Not vulnerable.
14.0 14.02.0-020
Secure Email and Web Manager
Cisco AsyncOS Software Release First Fixed Release
12.5 and earlier. Migrate to a fixed release.
13.8.1 Migrate to a fixed release.
14.0 Migrate to a fixed release.
14.1 14.1.0-239
14.2 Not vulnerable.
Web Security Appliance (WSA)
Cisco AsyncOS Software Release First Fixed Release
12.0 Migrate to a fixed release.
12.5 Migrate to a fixed release.
14.0 Migrate to a fixed release.
14.5 Not vulnerable.
The Cisco Product Security Incident Response Team (PSIRT) validates only
the affected and fixed release information that is documented in this
advisory.
Exploitation and Public Announcements
o The Cisco 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-SNMP-JLAJksWK
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2022-APR-06 |
+----------+---------------------------+----------+--------+--------------+
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