CVE Catalog

CVE-2017-12259

High
Published: Translated: NVD NIST

Summary

A vulnerability in the implementation of SIP functionality in Cisco Small Business SPA51x Series IP Phones could allow an unauthenticated, remote attacker to cause an affected device to become unresponsive, resulting in a denial of service (DoS) condition. The issue is due to improper handling of SIP request messages by the device.

Risk Assessment

An attacker could exploit this vulnerability by sending malformed SIP messages, leading to a prolonged device outage until it is manually restarted. This poses a risk of disrupting communication within the organization.

Recommendation

It is recommended to update the firmware of Cisco Small Business SPA51x IP Phones to a version newer than 7.6.2SR1 to mitigate this vulnerability. Additionally, monitoring SIP traffic may help in detecting and preventing potential attacks.

Related vulnerabilities

Original NVD description (English source)

A vulnerability in the implementation of Session Initiation Protocol (SIP) functionality in Cisco Small Business SPA51x Series IP Phones could allow an unauthenticated, remote attacker to cause an affected device to become unresponsive, resulting in a denial of service (DoS) condition. The vulnerability is due to the improper handling of SIP request messages by an affected device. An attacker could exploit this vulnerability by sending malformed SIP messages to an affected device. A successful exploit could allow the attacker to cause the affected device to become unresponsive, resulting in a DoS condition that persists until the device is restarted manually. This vulnerability affects Cisco Small Business SPA51x Series IP Phones that are running Cisco SPA51x Firmware Release 7.6.2SR1 or earlier. Cisco Bug IDs: CSCvc63982.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS