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AUSCERT External Security Bulletin Redistribution
ESB-2018.2376
Cisco Small Business 100 Series and 300 Series Wireless
Access Points Multiple vulnerabilities
16 August 2018
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Small Business 100 Series
Cisco Small Business 300 Series
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Denial of Service -- Existing Account
Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2018-0415 CVE-2018-0412
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180815-csb-wap-dos
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180815-sb-wap-encrypt
Comment: This bulletin contains two (2) Cisco Systems security advisories.
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Small Business 100 Series and 300 Series Wireless Access Points Denial of
Service Vulnerability
Medium
Advisory ID: cisco-sa-20180815-csb-wap-dos
First Published: 2018 August 15 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs:
CVE-2018-0415
CWE-388
CVSSÂ Score:
6.8 AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:X/RL:X/RC:X
Summary
o A vulnerability in the implementation of Extensible Authentication
Protocol over LAN (EAPOL) functionality in Cisco Small Business 100 Series
Wireless Access Points and Cisco Small Business 300 Series Wireless Access
Points could allow an authenticated, adjacent attacker to cause a denial
of service (DoS) condition on an affected device.
The vulnerability is due to the improper processing of certain EAPOL
frames. An attacker could exploit this vulnerability by sending a stream
of crafted EAPOL frames to an affected device. A successful exploit could
allow the attacker to force the access point (AP) to disassociate all the
associated stations (STAs) and to disallow future, new association
requests.
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-20180815-csb-wap-dos
Affected Products
o Vulnerable Products
This vulnerability affects Cisco Small Business 100 Series Wireless Access
Points and Cisco Small Business 300 Series Wireless Access Points. For
information about affected software releases, consult the Cisco bug ID(s)
at the top of this advisory.
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 For information about fixed software releases, consult the Cisco bug ID(s)
at the top of this advisory.
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.
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.
Subscribe to Cisco Security Notifications
o Subscribe
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180815-csb-wap-dos
Revision History
o +----------+---------------------------+----------+--------+-----------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+-----------------+
| 1.0 | Initial public release. | - | Final | 2018-August-15 |
+----------+---------------------------+----------+--------+-----------------+
================================================================================
Cisco Small Business 100 Series and 300 Series Wireless Access Points
Encryption Algorithm Downgrade Vulnerability
Medium
Advisory ID: cisco-sa-20180815-sb-wap-encrypt
First Published: 2018 August 15 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs:
CVE-2018-0412
CWE-310
CVSSÂ Score:
4.3 AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:X/RL:X/RC:X
Summary
o A vulnerability in the implementation of Extensible Authentication
Protocol over LAN (EAPOL) functionality in Cisco Small Business 100 Series
Wireless Access Points and Cisco Small Business 300 Series Wireless Access
Points could allow an unauthenticated, adjacent attacker to force the
downgrade of the encryption algorithm that is used between an
authenticator (access point) and a supplicant (Wi-Fi client).
The vulnerability is due to the improper processing of certain EAPOL
messages that are received during the Wi-Fi handshake process. An attacker
could exploit this vulnerability by establishing a man-in-the-middle
position between a supplicant and an authenticator and manipulating an
EAPOL message exchange to force usage of a WPA-TKIP cipher instead of the
more secure AES-CCMP cipher. A successful exploit could allow the attacker
to conduct subsequent cryptographic attacks, which could lead to the
disclosure of confidential information.
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-20180815-sb-wap-encrypt
Affected Products
o Vulnerable Products
This vulnerability affects Cisco Small Business 100 Series Wireless Access
Points and Cisco Small Business 300 Series Wireless Access Points. For
information about affected software releases, consult the Cisco bug ID(s)
at the top of this advisory.
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 For information about fixed software releases, consult the Cisco bug ID(s)
at the top of this advisory.
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.
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 Cisco would like to thank security researchers Chris McMahon Stone, Tom
Chothia, and Joeri de Ruiter from the University of Birmingham, UK, for
reporting this vulnerability.
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
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180815-sb-wap-encrypt
Revision History
o +----------+---------------------------+----------+--------+-----------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+-----------------+
| 1.0 | Initial public release. | - | Final | 2018-August-15 |
+----------+---------------------------+----------+--------+-----------------+
- --------------------------END INCLUDED TEXT--------------------
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