cisco-sa-20190220-ipphone-certs: Cisco SPA112, SPA525, and SPA5x5 Series IP Phones Certificate Validation Vulnerability
First published: Wed Feb 20 2019(Updated: )
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://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190220-ipphone-certs
Credit: Jan Dubový.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco SPA112 2-Port Phone Adapter Firmware | ||
| Cisco SPA 525g | ||
| Cisco SPA5x5 Series IP Phones |
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Reference Links
Frequently Asked Questions
What is the severity of cisco-sa-20190220-ipphone-certs?
The vulnerability cisco-sa-20190220-ipphone-certs has been classified as high severity.
How do I fix cisco-sa-20190220-ipphone-certs?
To fix cisco-sa-20190220-ipphone-certs, update the firmware on affected Cisco IP Phones to the latest version.
What products are affected by cisco-sa-20190220-ipphone-certs?
cisco-sa-20190220-ipphone-certs affects the Cisco SPA112, SPA525, and SPA5X5 Series IP Phones.
Can cisco-sa-20190220-ipphone-certs be exploited remotely?
Yes, cisco-sa-20190220-ipphone-certs can be exploited by an unauthenticated, remote attacker.
What is the impact of cisco-sa-20190220-ipphone-certs?
The impact of cisco-sa-20190220-ipphone-certs includes the potential for attackers to listen to or control aspects of TLS-encrypted SIP sessions.
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- canonical/cisco spa112 2-port phone adapter firmware
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