Cisco Security Advisory
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AV:N/AC:L/Au:N/C:P/I:P/A:N/E:F/RL:U/RC:C
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A vulnerability in the firmware of the Cisco Small Business SPA 300 and 500 series IP phones could allow an unauthenticated, remote attacker to listen to the audio stream of an IP phone.
The vulnerability is due to improper authentication settings in the default configuration. An attacker could exploit this vulnerability by sending a crafted XML request to the affected device. An exploit could allow the attacker to listen to a remote audio stream or make phone calls remotely.
Cisco has confirmed the vulnerability; however, software updates are not available.
To exploit this vulnerability, an attacker may need access to trusted, internal networks behind a firewall to send crafted XML requests to the targeted device. This access requirement may reduce the likelihood of a successful exploit.
Cisco would like to thank Chris Watts of Tech Analysis for reporting this vulnerability.
Cisco plans to release new software that addresses this vulnerability by April 10, 2015.
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Cisco has released bug ID CSCuo52482 for registered users that contains additional details and an up-to-date list of affected product versions.
Vulnerable Products
At the time this alert was first published, Cisco Small Business SPA300 and SPA500 Series IP phones version 7.5.5 was vulnerable. Later versions of Cisco Small Business SPA300 and SPA500 Series IP phones may also be vulnerable.Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by these vulnerabilities.
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Administrators are advised to contact the vendor regarding future updates and releases.
Administrators are advised to enable XML Execution authentication in the configuration settings of affected devices.
Administrators are advised to allow only trusted users to have network access.
Administrators can help protect affected systems from external attacks by using a solid firewall strategy.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators are advised to monitor affected systems.
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Software updates are not available.
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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.
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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.
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Show LessVersion Description Section Status Date 1.0 Cisco Small Business SPA 300 and 500 Series IP phones contain a vulnerability that could allow an unauthenticated, remote attacker to access sensitive information. Updates are not available. NA Final 2015-Mar-19
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