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Cisco NX-OS Software Border Gateway Protocol Denial of Service Vulnerability

cisco-sa-20180620-nxosbgp · High · Published · Updated

A vulnerability in the Border Gateway Protocol (BGP) implementation of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition due to the device unexpectedly reloading. The vulnerability is due to incomplete input validation of the BGP update messages. An attacker could exploit this vulnerability by sending a crafted BGP update message to the targeted device. An exploit could allow the attacker to cause the switch to reload unexpectedly. The Cisco implementation of the BGP protocol only accepts incoming BGP traffic from explicitly defined peers. To exploit this vulnerability, an attacker must be able to send the malicious packets over a TCP connection that appears to come from a trusted BGP peer or inject malformed messages into the victim's BGP network. This would require obtaining information about the BGP peers in the affected system's trusted network. The vulnerability may be triggered when the router receives a malformed BGP message from a peer on an existing BGP session. At least one BGP neighbor session must be established for a router to be vulnerable. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-nxosbgp This advisory is part of the June 2018 Cisco FXOS and NX-OS Software Security Advisory Collection, which includes 24 Cisco Security Advisories that describe 24 vulnerabilities. For a complete list of the advisories and links to them, see Cisco Event Response: June 2018 Cisco FXOS and NX-OS Software Security Advisory Collection.

Cisco advisory ·CSAF JSON

Workarounds

There are no workarounds that address this vulnerability. However, BGP Neighbor Authentication with MD5 can help to ensure that the configured BGP peer is not spoofed.

Configuring BGP Neighbor Authentication with MD5

BGP can be configured to authenticate route updates from peers using MD5 digests. To configure BGP to use MD5 authentication, use the following commands in the neighbor configuration mode CLI:

switch(config)# router bgp 65536
switch(config-router-neighbor)# password BGPpassword

Please refer to the Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide https://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/5_x/nx-os/unicast/configuration/guide/l3_cli_nxos/l3_advbgp.html for additional information.

CVEsCVE-2018-0295
Cisco Bug IDsCSCve79599, CSCve91387, CSCve91371, CSCve87784
CVSS ScoreBase 8.6
Base 8.6 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:X/RL:X/RC:X
Product Names From Source
Cisco NX-OS Software 4.1(2), Cisco NX-OS Software 4.1(3), Cisco NX-OS Software 4.1(4), Cisco NX-OS Software 4.1(5), Cisco NX-OS Software 5.0(2a), Cisco NX-OS Software 5.0(3), Cisco NX-OS Software 5.0(5), Cisco NX-OS Software 4.2(2a), Cisco NX-OS Software 4.2(3), Cisco NX-OS Software 4.2(4), Cisco NX-OS Software 4.2(6), Cisco NX-OS Software 4.2(8), Cisco NX-OS Software 5.1(1), Cisco NX-OS Software 5.1(1a), Cisco NX-OS Software 5.1(3), Cisco NX-OS Software 5.1(4), Cisco NX-OS Software 5.1(5), Cisco NX-OS Software 5.1(6), Cisco NX-OS Software 5.2(1), Cisco NX-OS Software 5.2(3a), Cisco NX-OS Software 5.2(4), Cisco NX-OS Software 5.2(5), Cisco NX-OS Software 5.2(7), Cisco NX-OS Software 5.2(9), Cisco NX-OS Software 5.2(3), Cisco NX-OS Software 5.2(9a), Cisco NX-OS Software 6.1(1), Cisco NX-OS Software 6.1(2), Cisco NX-OS Software 6.1(3), Cisco NX-OS Software 6.1(4), Cisco NX-OS Software 6.1(4a), Cisco NX-OS Software 6.1(5), Cisco NX-OS Software 6.1(3)S5, Cisco NX-OS Software 6.1(3)S6, Cisco NX-OS Software 6.1(5a), Cisco NX-OS Software 4.0(0)N1(1a), Cisco NX-OS Software 4.0(0)N1(2), Cisco NX-OS Software 4.0(0)N1(2a), Cisco NX-OS Software 4.0(1a)N1(1), Cisco NX-OS Software 4.0(1a)N1(1a), Cisco NX-OS Software 4.0(1a)N2(1), Cisco NX-OS Software 4.0(1a)N2(1a), Cisco NX-OS Software 4.1(3)N1(1), Cisco NX-OS Software 4.1(3)N1(1a), Cisco NX-OS Software 4.1(3)N2(1), Cisco NX-OS Software 4.1(3)N2(1a), Cisco NX-OS Software 4.2(1)N1(1), Cisco NX-OS Software 4.2(1)N2(1), Cisco NX-OS Software 4.2(1)N2(1a), Cisco NX-OS Software 5.0(2)N1(1), Cisco NX-OS Software 5.0(2)N2(1), Cisco NX-OS Software 5.0(2)N2(1a), Cisco NX-OS Software 5.0(3)A1(1), Cisco NX-OS Software 5.0(3)A1(2), Cisco NX-OS Software 5.0(3)A1(2a), Cisco NX-OS Software 5.0(3)N1(1c), Cisco NX-OS Software 5.0(3)N1(1), Cisco NX-OS Software 5.0(3)N1(1a), Cisco NX-OS Software 5.0(3)N1(1b), Cisco NX-OS Software 5.0(3)N2(1), Cisco NX-OS Software 5.0(3)N2(2), Cisco NX-OS Software 5.0(3)N2(2a), Cisco NX-OS Software 5.0(3)N2(2b), Cisco NX-OS Software 5.0(3)U1(1), Cisco NX-OS Software 5.0(3)U1(1a), Cisco NX-OS Software 5.0(3)U1(1b), Cisco NX-OS Software 5.0(3)U1(1d), Cisco NX-OS Software 5.0(3)U1(2), Cisco NX-OS Software 5.0(3)U1(2a), Cisco NX-OS Software 5.0(3)U1(1c), Cisco NX-OS Software 5.0(3)U2(1), Cisco NX-OS Software 5.0(3)U2(2), Cisco NX-OS Software 5.0(3)U2(2a), Cisco NX-OS Software 5.0(3)U2(2b), Cisco NX-OS Software 5.0(3)U2(2c), Cisco NX-OS Software 5.0(3)U2(2d), Cisco NX-OS Software 5.0(3)U3(1), Cisco NX-OS Software 5.0(3)U3(2), Cisco NX-OS Software 5.0(3)U3(2a), Cisco NX-OS Software 5.0(3)U3(2b), Cisco NX-OS Software 5.0(3)U4(1), Cisco NX-OS Software 5.0(3)U5(1), Cisco NX-OS Software 5.0(3)U5(1a), Cisco NX-OS Software 5.0(3)U5(1b), Cisco NX-OS Software 5.0(3)U5(1c), Cisco NX-OS Software 5.0(3)U5(1d), Cisco NX-OS Software 5.0(3)U5(1e), Cisco NX-OS Software 5.0(3)U5(1f), Cisco NX-OS Software 5.0(3)U5(1g), Cisco NX-OS Software 5.0(3)U5(1h), Cisco NX-OS Software 5.0(3)U5(1i), Cisco NX-OS Software 5.0(3)U5(1j), Cisco NX-OS Software 5.1(3)N1(1), Cisco NX-OS Software 5.1(3)N1(1a), Cisco NX-OS Software 5.1(3)N2(1), Cisco NX-OS Software 5.1(3)N2(1a), Cisco NX-OS Software 5.1(3)N2(1b), Cisco NX-OS Software 5.1(3)N2(1c), Cisco NX-OS Software 5.2(1)N1(1), Cisco NX-OS Software 5.2(1)N1(1a), Cisco NX-OS Software 5.2(1)N1(1b), Cisco NX-OS Software 5.2(1)N1(2), Cisco NX-OS Software 5.2(1)N1(2a), Cisco NX-OS Software 5.2(1)N1(3), Cisco NX-OS Software 5.2(1)N1(4), Cisco NX-OS Software 5.2(1)N1(5), Cisco NX-OS Software 5.2(1)N1(6), Cisco NX-OS Software 5.2(1)N1(7), Cisco NX-OS Software 5.2(1)N1(8a), Cisco NX-OS Software 5.2(1)N1(8), Cisco NX-OS Software 5.2(1)N1(8b), Cisco NX-OS Software 5.2(1)N1(9), Cisco NX-OS Software 5.2(1)N1(9a), Cisco NX-OS Software 5.2(1)N1(9b), Cisco NX-OS Software 5.2(9)N1(1), Cisco NX-OS Software 6.0(1), Cisco NX-OS Software 6.0(2), Cisco NX-OS Software 6.0(3), Cisco NX-OS Software 6.0(4), Cisco NX-OS Software 6.0(2)A1(1), Cisco NX-OS Software 6.0(2)A1(1a), Cisco NX-OS Software 6.0(2)A1(1b), Cisco NX-OS Software 6.0(2)A1(1c), Cisco NX-OS Software 6.0(2)A1(1d), Cisco NX-OS Software 6.0(2)A1(1e), Cisco NX-OS Software 6.0(2)A1(1f), Cisco NX-OS Software 6.0(2)A1(2d), Cisco NX-OS Software 6.0(2)A3(1), Cisco NX-OS Software 6.0(2)A3(2), Cisco NX-OS Software 6.0(2)A3(4), Cisco NX-OS Software 6.0(2)A4(1), Cisco NX-OS Software 6.0(2)A4(2), Cisco NX-OS Software 6.0(2)A4(3), Cisco NX-OS Software 6.0(2)A4(4), Cisco NX-OS Software 6.0(2)A4(5), Cisco NX-OS Software 6.0(2)A4(6), Cisco NX-OS Software 6.0(2)A6(1), Cisco NX-OS Software 6.0(2)A6(1a), Cisco NX-OS Software 6.0(2)A6(2), Cisco NX-OS Software 6.0(2)A6(2a), Cisco NX-OS Software 6.0(2)A6(3), Cisco NX-OS Software 6.0(2)A6(3a), Cisco NX-OS Software 6.0(2)A6(4), Cisco NX-OS Software 6.0(2)A6(4a), Cisco NX-OS Software 6.0(2)A6(5), Cisco NX-OS Software 6.0(2)A6(5a), Cisco NX-OS Software 6.0(2)A6(5b), Cisco NX-OS Software 6.0(2)A6(6), Cisco NX-OS Software 6.0(2)A6(7), Cisco NX-OS Software 6.0(2)A6(8), Cisco NX-OS Software 6.0(2)A7(1), Cisco NX-OS Software 6.0(2)A7(1a), Cisco NX-OS Software 6.0(2)A7(2), Cisco NX-OS Software 6.0(2)A7(2a), Cisco NX-OS Software 6.0(2)A8(1), Cisco NX-OS Software 6.0(2)A8(2), Cisco NX-OS Software 6.0(2)A8(3), Cisco NX-OS Software 6.0(2)A8(4), Cisco NX-OS Software 6.0(2)A8(4a), Cisco NX-OS Software 6.0(2)A8(5), Cisco NX-OS Software 6.0(2)A8(6), Cisco NX-OS Software 6.0(2)N1(1), Cisco NX-OS Software 6.0(2)N1(2), Cisco NX-OS Software 6.0(2)N1(2a), Cisco NX-OS Software 6.0(2)N2(1), Cisco NX-OS Software 6.0(2)N2(1b), Cisco NX-OS Software 6.0(2)N2(2), Cisco NX-OS Software 6.0(2)N2(3), Cisco NX-OS Software 6.0(2)N2(4), Cisco NX-OS Software 6.0(2)N2(5), Cisco NX-OS Software 6.0(2)N2(5a), Cisco NX-OS Software 6.0(2)N2(6), Cisco NX-OS Software 6.0(2)N2(7), Cisco NX-OS Software 6.0(2)U1(1), Cisco NX-OS Software 6.0(2)U1(2), Cisco NX-OS Software 6.0(2)U1(1a), Cisco NX-OS Software 6.0(2)U1(3), Cisco NX-OS Software 6.0(2)U1(4), Cisco NX-OS Software 6.0(2)U2(1), Cisco NX-OS Software 6.0(2)U2(2), Cisco NX-OS Software 6.0(2)U2(3), Cisco NX-OS Software 6.0(2)U2(4), Cisco NX-OS Software 6.0(2)U2(5), Cisco NX-OS Software 6.0(2)U2(6), Cisco NX-OS Software 6.0(2)U3(1), Cisco NX-OS Software 6.0(2)U3(2), Cisco NX-OS Software 6.0(2)U3(3), Cisco NX-OS Software 6.0(2)U3(4), Cisco NX-OS Software 6.0(2)U3(5), Cisco NX-OS Software 6.0(2)U3(6), Cisco NX-OS Software 6.0(2)U3(7), Cisco NX-OS Software 6.0(2)U3(8), Cisco NX-OS Software 6.0(2)U3(9), Cisco NX-OS Software 6.0(2)U4(1), Cisco NX-OS Software 6.0(2)U4(2), Cisco NX-OS Software 6.0(2)U4(3), Cisco NX-OS Software 6.0(2)U4(4), Cisco NX-OS Software 6.0(2)U5(1), Cisco NX-OS Software 6.0(2)U5(2), Cisco NX-OS Software 6.0(2)U5(3), Cisco NX-OS Software 6.0(2)U5(4), Cisco NX-OS Software 6.0(2)U6(1), Cisco NX-OS Software 6.0(2)U6(2), Cisco NX-OS Software 6.0(2)U6(3), Cisco NX-OS Software 6.0(2)U6(4), Cisco NX-OS Software 6.0(2)U6(5), Cisco NX-OS Software 6.0(2)U6(6), Cisco NX-OS Software 6.0(2)U6(7), Cisco NX-OS Software 6.0(2)U6(8), Cisco NX-OS Software 6.0(2)U6(1a), Cisco NX-OS Software 6.0(2)U6(2a), Cisco NX-OS Software 6.0(2)U6(3a), Cisco NX-OS Software 6.0(2)U6(4a), Cisco NX-OS Software 6.0(2)U6(5a), Cisco NX-OS Software 6.0(2)U6(5b), Cisco NX-OS Software 6.0(2)U6(5c), Cisco NX-OS Software 6.0(2)U6(9), Cisco NX-OS Software 6.0(2)U6(10), Cisco NX-OS Software 6.1(2)I1(3), Cisco NX-OS Software 6.1(2)I2(1), Cisco NX-OS Software 6.1(2)I2(2), Cisco NX-OS Software 6.1(2)I2(2a), Cisco NX-OS Software 6.1(2)I2(3), Cisco NX-OS Software 6.1(2)I2(2b), Cisco NX-OS Software 6.1(2)I3(1), Cisco NX-OS Software 6.1(2)I3(2), Cisco NX-OS Software 6.1(2)I3(3), Cisco NX-OS Software 6.1(2)I3(3.78), Cisco NX-OS Software 6.1(2)I3(4), Cisco NX-OS Software 6.1(2)I3(3a), Cisco NX-OS Software 6.1(2)I3(4a), Cisco NX-OS Software 6.1(2)I3(4b), Cisco NX-OS Software 6.1(2)I3(4c), Cisco NX-OS Software 6.1(2)I3(4d), Cisco NX-OS Software 6.1(2)I3(4e), Cisco NX-OS Software 6.1(2)I3(5), Cisco NX-OS Software 6.1(2)I3(5a), Cisco NX-OS Software 6.1(2)I3(5b), Cisco NX-OS Software 6.2(2), Cisco NX-OS Software 6.2(2a), Cisco NX-OS Software 6.2(6), Cisco NX-OS Software 6.2(6b), Cisco NX-OS Software 6.2(8), Cisco NX-OS Software 6.2(8a), Cisco NX-OS Software 6.2(8b), Cisco NX-OS Software 6.2(10), Cisco NX-OS Software 6.2(12), Cisco NX-OS Software 6.2(18), Cisco NX-OS Software 6.2(16), Cisco NX-OS Software 6.2(14b), Cisco NX-OS Software 6.2(14), Cisco NX-OS Software 6.2(14a), Cisco NX-OS Software 6.2(6a), Cisco NX-OS Software 7.0(3), Cisco NX-OS Software 7.0(0)N1(1), Cisco NX-OS Software 7.0(1)N1(1), Cisco NX-OS Software 7.0(1)N1(3), Cisco NX-OS Software 7.0(2)I2(2c), Cisco NX-OS Software 7.0(2)N1(1), Cisco NX-OS Software 7.0(2)N1(1a), Cisco NX-OS Software 7.0(3)F1(1), Cisco NX-OS Software 7.0(3)F2(1), Cisco NX-OS Software 7.0(3)I1(1), Cisco NX-OS Software 7.0(3)I1(1a), Cisco NX-OS Software 7.0(3)I1(1b), Cisco NX-OS Software 7.0(3)I1(2), Cisco NX-OS Software 7.0(3)I1(3), Cisco NX-OS Software 7.0(3)I1(3a), Cisco NX-OS Software 7.0(3)I1(3b), Cisco NX-OS Software 7.0(3)I2(2a), Cisco NX-OS Software 7.0(3)I2(2b), Cisco NX-OS Software 7.0(3)I2(2c), Cisco NX-OS Software 7.0(3)I2(2d), Cisco NX-OS Software 7.0(3)I2(2e), Cisco NX-OS Software 7.0(3)I2(3), Cisco NX-OS Software 7.0(3)I2(4), Cisco NX-OS Software 7.0(3)I2(5), Cisco NX-OS Software 7.0(3)I2(1), Cisco NX-OS Software 7.0(3)I2(1a), Cisco NX-OS Software 7.0(3)I2(2), Cisco NX-OS Software 7.0(3)I3(1), Cisco NX-OS Software 7.0(3)I4(1), Cisco NX-OS Software 7.0(3)I4(2), Cisco NX-OS Software 7.0(3)I4(3), Cisco NX-OS Software 7.0(3)I4(4), Cisco NX-OS Software 7.0(3)I4(5), Cisco NX-OS Software 7.0(3)I4(6), Cisco NX-OS Software 7.0(3)I5(1), Cisco NX-OS Software 7.0(3)I5(2), Cisco NX-OS Software 7.0(3)I6(1), Cisco NX-OS Software 7.0(3)IX1(2), Cisco NX-OS Software 7.0(3)IX1(2a), Cisco NX-OS Software 7.0(3)N1(1), Cisco NX-OS Software 7.0(4)N1(1), Cisco NX-OS Software 7.0(5)N1(1), Cisco NX-OS Software 7.0(5)N1(1a), Cisco NX-OS Software 7.0(6)N1(1), Cisco NX-OS Software 7.0(7)N1(1), Cisco NX-OS Software 7.0(8)N1(1), Cisco NX-OS Software 7.1(0)N1(1a), Cisco NX-OS Software 7.1(0)N1(1b), Cisco NX-OS Software 7.1(0)N1(1), Cisco NX-OS Software 7.1(1)N1(1), Cisco NX-OS Software 7.1(2)N1(1), Cisco NX-OS Software 7.1(3)N1(1), Cisco NX-OS Software 7.1(3)N1(2), Cisco NX-OS Software 7.1(3)N1(2.1), Cisco NX-OS Software 7.1(3)N1(3.12), Cisco NX-OS Software 7.1(4)N1(1), Cisco NX-OS Software 7.2(0)D1(0.437), Cisco NX-OS Software 7.2(0)D1(1), Cisco NX-OS Software 7.2(0)N1(1), Cisco NX-OS Software 7.2(0)ZZ(99.1), Cisco NX-OS Software 7.2(1)D1(1), Cisco NX-OS Software 7.2(1)N1(1), Cisco NX-OS Software 7.2(2)D1(2), Cisco NX-OS Software 7.2(2)D1(1), Cisco NX-OS Software 7.3(0.2), Cisco NX-OS Software 7.3(0)D1(1), Cisco NX-OS Software 7.3(0)DX(1), Cisco NX-OS Software 7.3(0)N1(1), Cisco NX-OS Software 7.3(1)D1(1B), Cisco NX-OS Software 7.3(1)D1(1), Cisco NX-OS Software 7.3(1)N1(0.1), Cisco NX-OS Software 7.3(1)N1(1), Cisco NX-OS Software 7.3(2)N1(0.296), Cisco NX-OS Software 7.3(2)N1(1), Cisco NX-OS Software 8.0(1)S2, Cisco NX-OS Software 8.0(1), Cisco NX-OS Software 8.1(1), Cisco NX-OS Software

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Product CVE Evidence