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Cisco Third-Generation IP Phone CTL Trust Chain Enforcement Vulnerability

Cisco-SA-20140221-CVE-2014-0737 · Medium · Published · Updated

A vulnerability in Certificate Trust List (CTL) authentication of Cisco third-generation IP phones could allow an unauthenticated, remote attacker to inject a crafted CTL file to the IP phone. The vulnerability is due to insufficient authentication of the CTL file. An attacker could exploit this vulnerability by injecting a crafted CTL file to the phone. An exploit could allow the attacker to cause the phone to trust systems under the attacker's control. Cisco has confirmed the vulnerability in a security notice; however, software updates are not available. To exploit this vulnerability, an attacker may require access to trusted, internal networks to inject a crafted CTL file to a targeted device. This access requirement decreases the likelihood of a successful exploit. Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.

Workarounds

Administrators are advised to contact the vendor regarding future updates and releases.

Administrators are advised to allow only trusted users to have network access.

Administrators are advised to monitor affected systems.

CVEsCVE-2014-0737
Cisco Bug IDsCSCuj66795
CVSS ScoreBase 4.3
Base 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N/E:F/RL:U/RC:C
Product Names From Source
Cisco Unified IP Phone 7961G-GE

Related Products

Product CVE Evidence