Ios xr 5.3.3 image download

A vulnerability in the ingress packet processing function of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device. The vulnerability is due to a logic error that occurs when an affected device processes Telnet protocol packets. An attacker could exploit this vulnerability by sending specific streams of packets to the affected device.

This vulnerability can be exploited using specific, crafted streams of packets over either IPv4 or IPv6. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. The vulnerability is due to improper resource allocation when an affected device processes either ICMP or Telnet protocol packets.

However, the process may have crashed for a reason other than the exploitation of one of these vulnerabilities. Customers are advised to contact their support organization to review the error messages and determine whether the device has been compromised by an exploitation of one of these vulnerabilities. As a mitigation for CVE, customers can disable the Telnet protocol for incoming connections. Because CVE can be exploited when processing a stream of either Telnet or ICMP protocol packets, the following steps for mitigation should be implemented together to ensure protection against the two attack vectors:.

While these mitigations have been deployed and were proven successful in a test environment, customers should determine the applicability and effectiveness on their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network, based on intrinsic customer deployment scenarios and limitations.

Version 1. Base 7. P processor at MHz, Revision 2. This vulnerability was found during the resolution of a Cisco TAC support case. Cisco Security Vulnerability Policy.

Version Description Section Status Date 1. Legal Disclaimer. Workarounds There are no workarounds that address this vulnerability. Software packages are installed from package installation envelope PIE files that contain one or more software components. Before upgrading to a new release, you must install all available bridge SMUs of the current release.

Production SMUs are intended for use in a live network environment and are formally supported by the Cisco TAC and the relevant development teams.

Software bugs identified through software recommendations or Bug Search Tools are not a basis for production SMU requests. RSS feeds are a free service. Skip to content Skip to search Skip to footer. Available Languages. Download Options. Updated: January 30, Use faceted search to locate content that is most relevant to you. Create customized PDFs for ready reference. Benefit from context-based recommendations.

Do provide feedback about your experience with the Content Hub. Table 1. Table 2. Caution If you remove the media in which the software image or configuration is stored, the router may become unstable and fail.

Table 3. See the following links for a summary of new and changes features in Release 5. There are no new software features introduced in this release.

It was a fairly small jump in terms of releases as I was just moving from 5. Anyway here are the steps. Download tar from cisco. The file was 1. Put the kettle on as this will take a while!