high
7.7
CWE
20
CVE Published
Advisory Published
Updated

CVE-2019-1963: Cisco FXOS and NX-OS Software Authenticated Simple Network Management Protocol Denial of Service Vulnerability

First published: Wed Aug 28 2019(Updated: )

A vulnerability in the Simple Network Management Protocol (SNMP) input packet processor of Cisco FXOS Software and Cisco NX-OS Software could allow an authenticated, remote attacker to cause the SNMP application on an affected device to restart unexpectedly. The vulnerability is due to improper validation of Abstract Syntax Notation One (ASN.1)-encoded variables in SNMP packets. An attacker could exploit this vulnerability by sending a crafted SNMP packet to the SNMP daemon on the affected device. A successful exploit could allow the attacker to cause the SNMP application to restart multiple times, leading to a system-level restart and a denial of service (DoS) condition.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco Nx-os>=5.2<6.2\(29\)
Cisco Nx-os>=7.3<8.4
Cisco Mds 9132t
Cisco Mds 9148s
Cisco Mds 9148t
Cisco Mds 9216
Cisco Mds 9216a
Cisco Mds 9216i
Cisco Mds 9222i
Cisco Mds 9250i
Cisco Mds 9396s
Cisco Mds 9396t
Cisco Mds 9506
Cisco Mds 9509
Cisco Mds 9513
Cisco Mds 9706
Cisco Mds 9710
Cisco Mds 9718
Cisco Nx-os<13.2\(7k\)
Cisco Nx-os>=14.0<14.0\(2c\)
Cisco Nx-os>=14.1<14.1\(1i\)
Cisco Nexus 92160yc-x
Cisco Nexus 92300yc
Cisco Nexus 93108tc-ex
Cisco Nexus 93108tc-fx
Cisco Nexus 93120tx
Cisco Nexus 9316d-gx
Cisco Nexus 93180lc-ex
Cisco Nexus 93180yc-ex
Cisco Nexus 93180yc-fx
Cisco Nexus 93216tc-fx2
Cisco Nexus 93240yc-fx2
Cisco Nexus 9332c
Cisco Nexus 93360yc-fx2
Cisco Nexus 9336c-fx2
Cisco Nexus 9348gc-fxp
Cisco Nexus 93600cd-gx
Cisco Nexus 9364c
Cisco Nexus 9500 Supervisor A
Cisco Nexus 9500 Supervisor A\+
Cisco Nexus 9500 Supervisor B
Cisco Nexus 9500 Supervisor B\+
Cisco Nexus 9504
Cisco Nexus 9508
Cisco Nexus 9516
Cisco Nx-os>=7.0\(3\)f<9.2\(3\)
Cisco N9k-c9504-fm-r
Cisco N9k-c9508-fm-r
Cisco N9k-x96136yc-r
Cisco N9k-x9636c-r
Cisco N9k-x9636c-rx
Cisco N9k-x9636q-r
Cisco Nexus 36180yc-r
Cisco Nexus 3636c-r
Cisco X96136yc-r
Cisco X9636c-r
Cisco X9636c-rx
Cisco X9636q-r
Cisco Nx-os<7.1\(5\)n1\(1b\)
Cisco Nx-os>=7.3<7.3\(5\)n1\(1\)
Cisco Nexus 5010
Cisco Nexus 5020
Cisco Nexus 5548p
Cisco Nexus 5548up
Cisco Nexus 5596t
Cisco Nexus 5596up
Cisco Nexus 56128p
Cisco Nexus 5624q
Cisco Nexus 5648q
Cisco Nexus 5672up
Cisco Nexus 5672up-16g
Cisco Nexus 5696q
Cisco Nexus 6001
Cisco Nexus 6004
Cisco Nx-os<6.2\(22\)
Cisco Nx-os>=7.2<7.2\(0\)d1\(1\)
Cisco Nx-os>=8.0<8.2\(3\)
Cisco Nx-os>=8.3<8.3\(2\)
Cisco 7000 10-slot
Cisco 7000 18-slot
Cisco 7000 4-slot
Cisco 7000 9-slot
Cisco 7700 10-slot
Cisco 7700 18-slot
Cisco 7700 2-slot
Cisco 7700 6-slot
Cisco N77-f312ck-26
Cisco N77-f324fq-25
Cisco N77-f348xp-23
Cisco N77-f430cq-36
Cisco N77-m312cq-26l
Cisco N77-m324fq-25l
Cisco N77-m348xp-23l
Cisco N7k-f248xp-25e
Cisco N7k-f306ck-25
Cisco N7k-f312fq-25
Cisco N7k-m202cf-22l
Cisco N7k-m206fq-23l
Cisco N7k-m224xp-23l
Cisco N7k-m324fq-25l
Cisco N7k-m348xp-25l
Cisco Nexus 7000 Supervisor 1
Cisco Nexus 7000 Supervisor 2
Cisco Nexus 7000 Supervisor 2e
Cisco Nexus 7700 Supervisor 2e
Cisco Nexus 7700 Supervisor 3e
Cisco Fx-os<2.2.2.91
Cisco Fx-os>=2.3<2.3.1.130
Cisco Fx-os>=2.4<2.4.1.222
Cisco Firepower 4110
Cisco Firepower 4120
Cisco Firepower 4140
Cisco Firepower 4150
Cisco Firepower 9300 With 1 Sm-24 Module
Cisco Firepower 9300 With 1 Sm-36 Module
Cisco Firepower 9300 With 1 Sm-44 Module
Cisco Firepower 9300 With 3 Sm-44 Module
Cisco Nx-os>=14.1<=14.1\(1i\)
Cisco 9432pq
Cisco 9536pq
Cisco 9636pq
Cisco 9736pq
Cisco N9k-x9432c-s
Cisco N9k-x9464px
Cisco N9k-x9464tx2
Cisco N9k-x9564px
Cisco N9k-x9564tx
Cisco N9k-x97160yc-ex
Cisco N9k-x9732c-ex
Cisco N9k-x9732c-fx
Cisco N9k-x9736c-ex
Cisco N9k-x9736c-fx
Cisco N9k-x9788tc-fx
Cisco Nx-os<5.2\(1\)sv3\(4.1a\)
Cisco Nexus 1000v Switch
Cisco Nx-os<5.2
Cisco Nexus 1000v Switch
Cisco Nx-os>=5.2<5.2\(1\)sv5\(1.2\)
Cisco Nexus 1000 Virtual Edge
Cisco Nx-os>=7.0\(3\)i4<7.0\(3\)i4\(9\)
Cisco Nx-os>=7.0\(3\)i7<7.0\(3\)i7\(6\)
Cisco Nx-os>=9.2<9.2\(3\)
Cisco N9k-c92160yc-x
Cisco N9k-c9236c
Cisco N9k-c9272q
Cisco N9k-c93180lc-ex
Cisco N9k-c93180yc-ex
Cisco N9k-c93180yc-fx
Cisco Nexus 3048
Cisco Nexus 3524-x\/xl
Cisco Nexus 3548-x\/xl

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Reference Links

Frequently Asked Questions

  • What is the vulnerability ID of the SNMP input packet processor vulnerability found in Cisco FXOS and NX-OS Software?

    The vulnerability ID is CVE-2019-1963.

  • What is the severity level of CVE-2019-1963?

    The severity level of CVE-2019-1963 is high with a CVSS score of 6.5.

  • Which Cisco software versions are affected by CVE-2019-1963?

    Cisco FXOS Software versions up to 2.2.2.91 and Cisco NX-OS Software versions up to 14.1(1i) are affected.

  • How can an authenticated, remote attacker exploit CVE-2019-1963 vulnerability?

    An attacker can exploit this vulnerability to cause the SNMP application on the affected device to restart unexpectedly by sending a crafted SNMP packet.

  • Where can I find more information about CVE-2019-1963 vulnerability?

    You can find more information about CVE-2019-1963 on the Cisco Security Advisory at the provided reference link.

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