var-201905-0602
Vulnerability from variot

A vulnerability in the Border Gateway Patrol (BGP) Multiprotocol Label Switching (MPLS)-based Ethernet VPN (EVPN) implementation of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to trigger a denial of service (DoS) condition on an affected device. The vulnerability is due to a logic error that occurs when the affected software processes specific EVPN routing information. An attacker could exploit this vulnerability by injecting malicious traffic patterns into the targeted EVPN network. A successful exploit could result in a crash of the l2vpn_mgr process on Provider Edge (PE) device members of the same EVPN instance (EVI). On each of the affected devices, a crash could lead to system instability and the inability to process or forward traffic through the device, resulting in a DoS condition that would require manual intervention to restore normal operating conditions. Cisco IOS XR The software contains an exceptional condition check vulnerability.Service operation interruption (DoS) There is a possibility of being put into a state. Cisco IOSXR Software is a fully modular, distributed network operating system from Cisco's IOS software family, including IOST, IOSS, and IOSXR. A denial of service vulnerability exists in Cisco IOSXRSoftware that could be exploited by an attacker to cause a denial of service. Cisco IOS XR Software is prone to a denial-of-service vulnerability. An attacker can exploit this issue to crash the process, denying service to legitimate users. This issue is being tracked by Cisco Bug ID CSCvk35997. This vulnerability stems from improper design or implementation problems in the code development process of network systems or products. The following products and versions are affected: Cisco IOS XR 6.1.0 to 6.3.3 (fixed in 6.3.3), 6.4.X prior to 6.4.2, 6.5.X prior to 6.5.2, 6.6. 1 Versions prior to 6.6.X

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