high
8.6
CWE
755 20
Advisory Published
Updated

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 SoftwareAffected VersionHow to fix
Cisco NX-OS<8.1\(1\)
Cisco MDS 9132T
Cisco MDS 9148S
Cisco MDS 9148T
Cisco MDS 9216
Cisco MDS 9216
Cisco MDS 9216
Cisco MDS 9222i
Cisco MDS 9250i
Cisco MDS 9396S
Cisco MDS 9396T
Cisco MDS 9500
Cisco MDS 9500
Cisco MDS 9513 Firmware
Cisco MDS 9706 Firmware
Cisco MDS 9710 Firmware
Cisco MDS 9718 Firmware
Cisco NX-OS<7.0\(3\)i4\(8\)
Cisco NX-OS>=7.0\(3\)i7<7.0\(3\)i7\(2\)
Cisco Nexus 9432PQ
Cisco Nexus 9536PQ
Cisco Nexus 9636PQ
Cisco Nexus 9736PQ
Cisco Nexus 9000 Series N9K-X9432C-S
Cisco Nexus 9000 Series N9K-X9464PX
Cisco N9K-X9464TX2 Firmware
Cisco Nexus N9K-X9564PX
Cisco Nexus N9K-X9564TX
Cisco Nexus 9636C-R
Cisco Nexus n9k-x9636c-rx
Cisco Nexus 9000 N9K-X97160YC-EX
Cisco Nexus 9000 Series Switches n9k-x9732c-ex
Cisco Nexus 9000 Series N9K-X9732C-FX
Cisco Nexus 9000 Series Switch n9k-x9736c-ex
Cisco Nexus 9000 Series Switch
Cisco Nexus 9000 Series Switch n9k-x9788tc-fx
Cisco Nexus 3048 Firmware
Cisco Nexus 31108PC-V Firmware
Cisco Nexus 31108TC-V Firmware
Cisco Nexus 31128PQ
Cisco Nexus 3132C-Z Firmware
Cisco Nexus 3132Q-V Firmware
Cisco Nexus 3132Q-X/3132Q-XL
Cisco Nexus 3164Q Firmware
Cisco Nexus 3172PQ/PQ-XL
Cisco Nexus 3172TQ-XL Firmware
Cisco Nexus 3232C
Cisco Nexus 3264C-E Firmware
Cisco Nexus 3264Q Firmware
Cisco Nexus 3408-S Firmware
Cisco Nexus 34180YC Firmware
Cisco Nexus 3432D-S Firmware
Cisco Nexus 3464C Firmware
Cisco Nexus 3524-x/xl
Cisco Nexus 3548-x/xl
Cisco Nexus 36180YC-R Firmware
Cisco Nexus 3636C-R Firmware
Cisco Nexus 92160YC Switch
Cisco Nexus 92300YC Firmware
Cisco Nexus
Cisco Nexus 93108TC-FX Switch
Cisco Nexus 93120TX Firmware
Cisco Nexus 9316D-GX Firmware
Cisco Nexus 9000 Series Switch
Cisco Nexus 93180YC-EX-24
Cisco Nexus 93180YC-FX Firmware
Cisco Nexus 93216TC-FX2 Firmware
Cisco Nexus 93240YC-FX2 Firmware
Cisco Nexus 9332C Firmware
Cisco Nexus 93360YC-FX2
Cisco Nexus 9336C-FX2 Firmware
Cisco Nexus 9348GC-FXP Firmware
Cisco Nexus 93600CD-GX Firmware
Cisco Nexus 9364c-h1
Cisco Nexus 9500 Supervisor A
Cisco Nexus 9500 Supervisor A+
Cisco Nexus 9500 Supervisor B firmware
Cisco Nexus 9500 Supervisor B+
Cisco Nexus 9504 Firmware
Cisco Nexus 9508
Cisco Nexus 9516 firmware
Cisco Nexus N9K-X9636Q-R
Cisco NX-OS>=7.0\(3\)<7.0\(3\)f3\(1\)
Cisco Nexus 9500 Series
Cisco Nexus N9K-C9508-FM-R
Cisco x96136yc-r
Cisco Nexus N9K-X9636Q-R
Cisco Nexus 36180YC-R
Cisco x9636c-rx
Cisco Nexus 9636C-R
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 Firmware
Cisco Nexus 5548UP Firmware
Cisco Nexus 5596T Firmware
Cisco Nexus 5596UP Firmware
Cisco 56128p
Cisco Nexus 5624Q Firmware
Cisco Nexus 5648Q Firmware
Cisco Nexus 5672UP-16G
Cisco Nexus 5672UP-16G Firmware
Cisco Nexus 5696Q Firmware
Cisco Nexus 6001 Firmware
Cisco Nexus 6004 Firmware
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 Nexus 7000
Cisco Nexus 7000 18-slot
Cisco Nexus 7000 4-slot
Cisco Nexus 7000 9-slot
Cisco 7700
Cisco 7700
Cisco 7700
Cisco 7700
Cisco Nexus 7000 Series Switch - n77-f312ck-26
Cisco Nexus 7000 Series n77-f324fq-25
Cisco Nexus 7700 Series Switch
Cisco Nexus 7700 series
Cisco Nexus 7000 Series N77-M312CQ-26L
Cisco Nexus 7000 Series n7k-m324fq-25l
Cisco Nexus 7000 Series Switch (N77-M348XP-23L)
Cisco Nexus 7000 n7k-f248xp-25e
Cisco Nexus 7000 Series Switch - N7K-F306CK-25
Cisco Nexus 7000 Series Switch
Cisco Nexus 7000 Series Switches
Cisco Nexus 7000 Series N7K-M206FQ-23L
Cisco NEXUS 7000 Series Switch (Model N7K-M224XP-23L)
Cisco Nexus 7000 Series n7k-m324fq-25l
Cisco Nexus 7000 Series N7K-M348XP-25L
Cisco Nexus 7000 Supervisor 1 Firmware
Cisco Nexus 7000 Supervisor 2E
Cisco Nexus 7000 Supervisor 2E Firmware
Cisco Nexus 7700 Supervisor 2E Firmware
Cisco Nexus 7700 Supervisor 3E Firmware
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 Next-Generation Firewall
Cisco Firepower 4120 Next-Generation Firewall
Cisco Firepower 4140 Next-Generation Firewall
Cisco Firepower 4150 Next-Generation Firewall
Cisco Firepower 9300 SM-24
Cisco Firepower 9300 SM-36
Cisco Firepower 9300 SM-44
Cisco Firepower 9300
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 for Hyper-V
Cisco Nexus 1000V

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2019-1858?

    CVE-2019-1858 is categorized with a high severity level due to its potential impact on system stability.

  • How do I fix CVE-2019-1858?

    To mitigate CVE-2019-1858, Cisco recommends upgrading to the fixed software versions available in their security advisory.

  • Which Cisco devices are affected by CVE-2019-1858?

    CVE-2019-1858 affects multiple Cisco NX-OS and FXOS versions, specifically those under version 8.1(1) and before 7.0(3)i7(2).

  • Can CVE-2019-1858 be exploited remotely?

    Yes, CVE-2019-1858 can be exploited by an unauthenticated remote attacker.

  • What does CVE-2019-1858 impact in my Cisco devices?

    CVE-2019-1858 impacts the Simple Network Management Protocol (SNMP) leak in system memory, which may lead to device restarts.

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