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AUSCERT External Security Bulletin Redistribution
ESB-2019.2680
Cisco Small Business SPA500 Series IP Phones Local Command
Execution Vulnerability
18 July 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Small Business SPA500 Series IP Phones
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Execute Arbitrary Code/Commands -- Console/Physical
Resolution: Patch/Upgrade
CVE Names: CVE-2019-1923
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190717-spa500-command
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Cisco Small Business SPA500 Series IP Phones Local Command Execution
Vulnerability
Priority: Medium
Advisory ID: cisco-sa-20190717-spa500-command
First Published: 2019 July 17 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds availableCisco Bug IDs: CSCvp40762CSCvp40765
CVE-2019-1923
CWE-77
CVSS Score:
6.6 AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X
Summary
o A vulnerability in Cisco Small Business SPA500 Series IP Phones could allow
a physically proximate attacker to execute arbitrary commands on the
device.
The vulnerability is due to improper input validation in the device
configuration interface. An attacker could exploit this vulnerability by
accessing the configuration interface, which may require a password, and
then accessing the device's physical interface and inserting a USB storage
device. A successful exploit could allow the attacker to execute arbitrary
commands on the device in an elevated security context.
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-20190717-spa500-command
Affected Products
o Vulnerable Products
At the time of publication, this vulnerability affected Cisco Small
Business SPA500 Series IP Phones firmware releases 7.6.2SR5 and prior.
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
For information about fixed software releases, see the Details section in
the bug ID(s) at the top of this advisory.
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 Dustin Cobb of Aon's Cyber Labs 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.
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20190717-spa500-command
Revision History
o +---------+---------------------------+---------+--------+---------------+
| Version | Description | Section | Status | Date |
+---------+---------------------------+---------+--------+---------------+
| 1.0 | Initial public release. | - | Final | 2019-July-17 |
+---------+---------------------------+---------+--------+---------------+
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