CVE-2019-1849: A vulnerability in the Border Gateway Patrol (BGP) Multiprotocol Label Switching (MPLS)-based Ethernet VPN (EVPN) implementation of Cisco IOS XR Software could…

medium6.5CVSS 3.0

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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.

Affected

6 ranges

Vendor	Product	Version range	Fixed in
cisco	cisco_ios_xr_software	>= unspecified < n/a	n/a
cisco	ios_xr	—	—
cisco	ios_xr	>= 6.1.0 < 6.3.3	6.3.3
cisco	ios_xr	>= 6.4.0 < 6.4.2	6.4.2
cisco	ios_xr	>= 6.5.0 < 6.5.2	6.5.2
cisco	ios_xr	>= 6.6.0 < 6.6.1	6.6.1