Rewterz Threat Alert – Nice Try: 501 (Ransomware) Not Implemented

Rewterz Threat Advisory – CVE-2019-12636 – Cisco Small Business Smart and Managed Switches Cross-Site Request Forgery Vulnerability

January 28, 2020

Rewterz Threat Advisory – CVE-2019-16018 – Cisco IOS XR Software BGP EVPN Operational Routes Denial of Service Vulnerability

Severity

High

Analysis Summary

The vulnerability is due to incorrect processing of a BGP update message that contains crafted EVPN attributes. An attacker could indirectly exploit the vulnerability by sending BGP EVPN update messages with a specific, malformed attribute to an affected system and waiting for a user on the device to display the EVPN operational routes’ status. If successful, the attacker could cause the BGP process to restart unexpectedly, resulting in a DoS condition.

Impact

Denial of service

Affected Vendors

Cisco

Affected Products

Cisco IOS XR Software later than 6.6.1

Remediation

Please refer to vendor”s advisory for the list of upgraded patches.

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200122-ios-xr-routes

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