high
8.6
CWE
770 399
Advisory Published
Updated

CVE-2019-1599: Cisco NX-OS Software Netstack Denial of Service Vulnerability

First published: Thu Mar 07 2019(Updated: )

A vulnerability in the network stack of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on the affected device. The vulnerability is due to an issue with allocating and freeing memory buffers in the network stack. An attacker could exploit this vulnerability by sending crafted TCP streams to an affected device in a sustained way. A successful exploit could cause the network stack of an affected device to run out of available buffers, impairing operations of control plane and management plane protocols, resulting in a DoS condition. Note: This vulnerability can be triggered only by traffic that is destined to an affected device and cannot be exploited using traffic that transits an affected device. Nexus 1000V Switch for Microsoft Hyper-V is affected in versions prior to 5.2(1)SM3(2.1). Nexus 1000V Switch for VMware vSphere is affected in versions prior to 5.2(1)SV3(4.1a). Nexus 3000 Series Switches are affected in versions prior to 7.0(3)I7(6) and 9.2(2). Nexus 3500 Platform Switches are affected in versions prior to 6.0(2)A8(11), 7.0(3)I7(6), and 9.2(2). Nexus 3600 Platform Switches are affected in versions prior to 7.0(3)F3(5) and 9.2(2). Nexus 5500, 5600, and 6000 Series Switches are affected in versions prior to 7.1(5)N1(1b) and 7.3(5)N1(1). Nexus 7000 and 7700 Series Switches are affected in versions prior to 6.2(22. Nexus 9500 R-Series Line Cards and Fabric Modules are affected in versions prior to 7.0(3)F3(5) and 9.2(2). UCS 6200 and 6300 Series Fabric Interconnect are affected in versions prior to 3.2(3j) and 4.0(2a). UCS 6400 Series Fabric Interconnect are affected in versions prior to 4.0(2a).

Credit: ykramarz@cisco.com ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco Nx-os>=9.2<9.2\(2\)
Cisco Nexus 3000
Cisco Nexus 3500
Cisco Nexus 3600
Cisco Nx-os>=7.0\(3\)<7.0\(3\)i7\(5\)
Cisco Nx-os>=7.0\(3\)<7.0\(3\)f3\(5\)
Cisco Nx-os>=7.2<7.3\(5\)n1\(1\)
Cisco Nexus 5500
Cisco Nexus 5600
Cisco Nexus 6000
Cisco Nx-os>=8.3<8.3\(2\)
Cisco Nexus 7000
Cisco Nexus 7700
Cisco Nexus 9000
Cisco Nexus 9500
Cisco Nx-os<6.0\(2\)a8\(11\)
Cisco Nx-os<6.2\(22\)
Cisco Nx-os>=7.0\(3\)i5<7.0\(3\)i7\(6\)
Cisco Nx-os<5.2\(1\)sm3\(2.1\)
Cisco Nexus 1000v
Cisco Nx-os<5.2\(1\)sv3\(4.1a\)
Cisco Nexus 1000v
Cisco Nx-os>=4.0<4.0\(2a\)
Cisco UCS 6200
Cisco Ucs 6300
Cisco Ucs 6400
Cisco Nx-os<3.2\(3j\)
Cisco Nx-os<7.0\(3\)i4\(9\)
Cisco Nx-os<7.1\(5\)n1\(1b\)
Cisco Nx-os>=8.0<8.2\(3\)
Cisco Nx-os>=7.2<7.3\(3\)d1\(1\)
All of
Cisco Nx-os>=9.2<9.2\(2\)
Any of
Cisco Nexus 3000
Cisco Nexus 3500
Cisco Nexus 3600
All of
Cisco Nx-os>=7.0\(3\)<7.0\(3\)i7\(5\)
Cisco Nexus 3500
All of
Cisco Nx-os>=7.0\(3\)<7.0\(3\)f3\(5\)
Cisco Nexus 3600
All of
Cisco Nx-os>=7.2<7.3\(5\)n1\(1\)
Any of
Cisco Nexus 5500
Cisco Nexus 5600
Cisco Nexus 6000
All of
Cisco Nx-os>=8.3<8.3\(2\)
Any of
Cisco Nexus 7000
Cisco Nexus 7700
All of
Cisco Nx-os>=9.2<9.2\(2\)
Any of
Cisco Nexus 9000
Cisco Nexus 9500
All of
Cisco Nx-os<6.0\(2\)a8\(11\)
Cisco Nexus 3500
All of
Cisco Nx-os<6.2\(22\)
Any of
Cisco Nexus 7000
Cisco Nexus 7700
All of
Cisco Nx-os>=7.0\(3\)i5<7.0\(3\)i7\(6\)
Cisco Nexus 3000
All of
Cisco Nx-os>=7.0\(3\)<7.0\(3\)f3\(5\)
Cisco Nexus 9500
All of
Cisco Nx-os<5.2\(1\)sm3\(2.1\)
Cisco Nexus 1000v
All of
Cisco Nx-os<5.2\(1\)sv3\(4.1a\)
Cisco Nexus 1000v
All of
Cisco Nx-os>=4.0<4.0\(2a\)
Any of
Cisco UCS 6200
Cisco Ucs 6300
All of
Cisco Nx-os>=4.0<4.0\(2a\)
Cisco Ucs 6400
All of
Cisco Nx-os<3.2\(3j\)
Any of
Cisco UCS 6200
Cisco Ucs 6300
All of
Cisco Nx-os<7.0\(3\)i4\(9\)
Cisco Nexus 3000
All of
Cisco Nx-os<7.1\(5\)n1\(1b\)
Any of
Cisco Nexus 5500
Cisco Nexus 5600
Cisco Nexus 6000
All of
Cisco Nx-os>=8.0<8.2\(3\)
Any of
Cisco Nexus 7000
Cisco Nexus 7700
All of
Cisco Nx-os>=7.2<7.3\(3\)d1\(1\)
Any of
Cisco Nexus 7000
Cisco Nexus 7700
All of
Cisco Nx-os>=7.0\(3\)i5<7.0\(3\)i7\(6\)
Cisco Nexus 9000
All of
Cisco Nx-os<7.0\(3\)i4\(9\)
Cisco Nexus 9000

Remedy

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-nxos-netstack

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Reference Links

Frequently Asked Questions

  • What is CVE-2019-1599?

    CVE-2019-1599 is a vulnerability in the network stack of Cisco NX-OS Software that could allow an unauthenticated remote attacker to cause a denial of service (DoS) condition on the affected device.

  • How severe is CVE-2019-1599?

    CVE-2019-1599 has a severity value of 8.6, which is considered high.

  • How does CVE-2019-1599 affect Cisco NX-OS Software?

    CVE-2019-1599 affects Cisco NX-OS Software by causing a denial of service (DoS) condition on the affected device.

  • How can I fix CVE-2019-1599?

    To fix CVE-2019-1599, apply the necessary updates or patches provided by Cisco.

  • Where can I find more information about CVE-2019-1599?

    You can find more information about CVE-2019-1599 on the SecurityFocus and Cisco Security Advisory websites.

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