Cisco 2

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The Cisco SPA is compact in design and compatible with international voice and data standards. It can be used with residential, home-office, and small-business-VoIP service offerings, including full-featured hosted or open source IP PBX environments.

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High-quality Voice and Fax over the Internet Now you can use your phone over the Internet, without compromising on voice quality or phone and fax features. The Cisco SPA 2 Port Adapter: Uses advanced voice quality-of-service QoS capabilities and the voice Session Initiation Protocol SIP stack Supports reliable faxing with simultaneous voice and data use Includes two standard telephone ports, each with an independent phone number, for use with analog fax or phone devices Is compatible with all industry voice and data standards and common telephone features such as caller ID, call waiting, and voicemail Additional Documentation User Guides, Release Notes, and Support Information Product Support Services Cisco's Services can help you increase operational efficiency, lower support costs, and improve availability risk management.

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Select core technology track and a focused concentration exam to customize your professional-level certification. This certification is accepted worldwide as the most prestigious certification in the technology industry.

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cisco 2

Become a Cisco Insider. Exploring careers in cybersecurity Learn about the many paths to a rewarding career in cybersecurity. Start now Get more resources. Webex helps you prepare for a safe return to the office The workplace is changing how people work and collaborate. See it in action Data center Introducing new ways to master the evolving data center network Be ready with innovations in DevOps solutions, G technology, service provider, and storage networking.

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DevNet Create Grow your network automation skills Join us October 13 for a free, virtual, global conference for all levels of experience. Case study Keeping a city connected in times of crisis City of Buffalo shifts call center to remote work in 48 hours.The memory consumption may negatively impact other processes that are running on the device.

These vulnerabilities are due to the incorrect handling of IGMP packets.

Cisco SPA112 2-Port Phone Adapter

An attacker could exploit these vulnerabilities by sending crafted IGMP traffic to an affected device. A successful exploit could allow the attacker to immediately crash the IGMP process or cause memory exhaustion, resulting in other processes becoming unstable.

These processes may include, but are not limited to, interior and exterior routing protocols. There are no workarounds that address these vulnerabilities. There are multiple mitigations available to customers depending on their needs. An administrator can determine whether multicast routing is enabled on a device by issuing the show igmp interface command. The following output shows a device with multicast routing enabled:.

If the output of show igmp interface is empty, multicast routing is not enabled and the device is not affected by these vulnerabilities. An administrator can determine whether the device is receiving DVMRP traffic by issuing the show igmp traffic command.

Only products listed in the Vulnerable Products section of this advisory are known to be affected by these vulnerabilities. These vulnerabilities result in memory exhaustion, which can impact other processes on the device. In the case of an immediate IGMP process crash, it is not necessary to manually restart the IGMP process because the system has already performed that action.

This automated restart will recover the consumed memory. When considering mitigations, it should be understood that for the memory exhaustion case, the rate limiter and the access control methods are effective. For the immediate IGMP process crash case, only the access control method is effective. When a device is experiencing memory exhaustion based on exploitation of these vulnerabilities, the following messages may be seen in the system logs:. When a device has experienced a crash of the IGMP process, the following messages may be seen in the system logs:.

Although there are no workarounds for these vulnerabilities, there are multiple mitigations available to customers depending on their needs.

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As a mitigation for the memory exhaustion case, it is recommended that customers implement a rate limiter. This will require that customers understand their current rate of IGMP traffic and set a rate lower than the current average rate. It is worth noting that there is a default limiter in place. In configuration mode, the customer can enter the lpts pifib hardware police flow igmp rate command as follows:.

This command will not remove the exploit vector. However, the command will reduce the traffic rate and increase the time necessary for successful exploitation. The customer can use this time to perform recovery actions.

cisco 2

As a mitigation for both the memory exhaustion case and the immediate IGMP process crash case, customers may implement an access control entry ACE to an existing interface access control list ACL.

Customers may only install and expect support for software versions and feature sets for which they have purchased a license. In most cases this will be a maintenance upgrade to software that was previously purchased.


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