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AUSCERT External Security Bulletin Redistribution
ESB-2019.0538
Cisco SPA112, SPA525, and SPA5x5 Series IP Phones
Certificate Validation Vulnerability
21 February 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco SPA112
Cisco SPA525
Cisco SPA5X5 Series
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Provide Misleading Information -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-1683
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190220-ipphone-certs
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Cisco SPA112, SPA525, and SPA5x5 Series IP Phones Certificate Validation
Vulnerability
Priority: Medium
Advisory ID: cisco-sa-20190220-ipphone-certs
First Published: 2019 February 20 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvm49157
CSCvn17125
CSCvn17128
CVE-2019-1683
CWE-295
CVSSÂ Score:
6.5 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N/E:X/RL:X/RC:X
Summary
o
A vulnerability in the certificate handling component of the Cisco SPA112,
SPA525, and SPA5X5 Series IP Phones could allow an unauthenticated, remote
attacker to listen to or control some aspects of a Transport Level
Security (TLS)-encrypted Session Initiation Protocol (SIP) conversation.
The vulnerability is due to the improper validation of server
certificates. An attacker could exploit this vulnerability by crafting a
malicious server certificate to present to the client. An exploit could
allow an attacker to eavesdrop on TLS-encrypted traffic and potentially
route or redirect calls initiated by an affected device.
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-20190220-ipphone-certs
Affected Products
o Vulnerable Products
This vulnerability affects Cisco SPA112, Cisco SPA525, and Cisco SPA5x5
Series IP Phones. 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 Jan Dubovy 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-20190220-ipphone-certs
Revision History
o
+----------+--------------------------+----------+--------+-------------------+
| Version | Description | Section | Status | Date |
+----------+--------------------------+----------+--------+-------------------+
| 1.0 | Initial public release. | -- | Final | 2019-February-20 |
+----------+--------------------------+----------+--------+-------------------+
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