CVE-2019-1858: Cisco FXOS and NX-OS Software Simple Network Management Protocol Denial of Service Vulnerability

First published: Thu May 16 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 unauthenticated, remote attacker to cause the SNMP application to leak system memory, which could cause an affected device to restart unexpectedly. The vulnerability is due to improper error handling when processing inbound SNMP packets. An attacker could exploit this vulnerability by sending multiple crafted SNMP packets to an affected device. A successful exploit could allow the attacker to cause the SNMP application to leak system memory because of an improperly handled error condition during packet processing. Over time, this memory leak could 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 Software	Affected Version	How to fix
Cisco Nx-os	<8.1\(1\)
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	<7.0\(3\)i4\(8\)
Cisco Nx-os	>=7.0\(3\)i7<7.0\(3\)i7\(2\)
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-x9636c-r
Cisco N9k-x9636c-rx
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 Nexus 3048
Cisco Nexus 31108pc-v
Cisco Nexus 31108tc-v
Cisco Nexus 31128pq
Cisco Nexus 3132c-z
Cisco Nexus 3132q-v
Cisco Nexus 3132q-x\/3132q-xl
Cisco Nexus 3164q
Cisco Nexus 3172pq\/pq-xl
Cisco Nexus 3172tq-xl
Cisco Nexus 3232c
Cisco Nexus 3264c-e
Cisco Nexus 3264q
Cisco Nexus 3408-s
Cisco Nexus 34180yc
Cisco Nexus 3432d-s
Cisco Nexus 3464c
Cisco Nexus 3524-x\/xl
Cisco Nexus 3548-x\/xl
Cisco Nexus 36180yc-r
Cisco Nexus 3636c-r
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 X9636q-r
Cisco Nx-os	>=7.0\(3\)<7.0\(3\)f3\(1\)
Cisco N9k-c9504-fm-r
Cisco N9k-c9508-fm-r
Cisco N9k-x96136yc-r
Cisco N9k-x9636q-r
Cisco X96136yc-r
Cisco X9636c-r
Cisco X9636c-rx
Cisco Nx-os	<7.1\(5\)n1\(1b\)
Cisco Nx-os	>=7.3<7.3\(4\)n1\(1a\)
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<8.1\(1\)
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 Firepower Extensible Operating System	>=2.6<2.6.1.131
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	<14.0\(2c\)
Cisco Nx-os	>=14.1<14.1\(1i\)
Cisco Nx-os	<6.0\(2\)a8\(4\)
Cisco Nx-os	<5.2\(1\)sv3\(4.1a\)
Cisco Nexus 1000v
Cisco Nexus 1000v

CVE-2019-1858: Cisco FXOS and NX-OS Software Simple Network Management Protocol Denial of Service Vulnerability

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