Cisco ATA 187 Analog Telephone Adapter firmware versions 220.127.116.11 and 18.104.22.168 contain a vulnerability that could allow an unauthenticated, remote attacker to access the operating system of a targeted device. Updates are available.
Cisco ATA 187 Analog Telephone Adaptor firmware versions 22.214.171.124 and 126.96.36.199 contain a vulnerability that could allow an unauthenticated, remote attacker to access the operating system of the affected device.
The vulnerability is due to improper validation of authentication on TCP port 7870 and improper authorization of commands within the operating system. An attacker could exploit this vulnerability by connecting to the affected system and sending arbitrary commands.
Cisco has confirmed the vulnerability in a security advisory and released software updates.
Cisco ATA 187 Analog Telephone Adaptor versions 188.8.131.52 and 184.108.40.206 are vulnerable.
Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
A remote attacker could exploit the vulnerability to access sensitive information, create files, or cause a denial of service (DoS) condition for legitimate users.
The vulnerability exists because the affected software performs insufficient validation of user access credentials when handling Telnet connections to TCP port 7870.
A remote attacker could exploit the vulnerability by establishing an unauthenticated Telnet session on TCP port 7870 of a targeted device and issuing arbitrary commands to the operating system of a targeted device. The ability to issue arbitrary commands could allow the attacker to access sensitive information, create files, or cause a DoS condition for legitimate users.
Administrators are advised to apply the appropriate updates.
Administrators may consider disabling remote Telnet access to affected devices.
Administrators are advised to monitor affected systems.
Cisco customers with active contracts can obtain updates through the Software Center at the following link: Cisco. Cisco customers without contracts can obtain upgrades by contacting the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via e-mail at firstname.lastname@example.org.
The security vulnerability applies to the following combinations of products.
Cisco ATA 187 Analog Telephone Adaptor
9.2 .1.0, .3.1
Alerts and bulletins on the Cisco Security Intelligence Operations Portal are highlighted by analysts in the
Cisco Threat Operations Center and represent a subset of the comprehensive content that is available through Cisco Security IntelliShield Alert Manager Service.
This customizable threat and vulnerability alert service provides security staff with access to timely, accurate, and credible information about threats and vulnerabilities that may affect their environment.
The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.