high
7.7
CWE
400
Advisory Published
Updated

CVE-2018-0309

First published: Thu Jun 21 2018(Updated: )

A vulnerability in the implementation of a specific CLI command and the associated Simple Network Management Protocol (SNMP) MIB for Cisco NX-OS (in standalone NX-OS mode) on Cisco Nexus 3000 and 9000 Series Switches could allow an authenticated, remote attacker to exhaust system memory on an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to the incorrect implementation of the CLI command, resulting in a failure to free all allocated memory upon completion. An attacker could exploit this vulnerability by authenticating to the affected device and repeatedly issuing a specific CLI command or sending a specific SNMP poll request for a specific Object Identifier (OID). A successful exploit could allow the attacker to cause the IP routing process to restart or to cause a device reset, resulting in a DoS condition. Cisco Bug IDs: CSCvf23136.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco Nx-os=7.0\(3\)i5\(2\)
Cisco Nx-os=7.0\(3\)i6\(1\)
Cisco Nexus 3016
Cisco Nexus 3048
Cisco Nexus 3064
Cisco Nexus 3064-t
Cisco Nexus 31108pc-v
Cisco Nexus 31108tc-v
Cisco Nexus 31128pq
Cisco Nexus 3132q
Cisco Nexus 3132q-v
Cisco Nexus 3132q-xl
Cisco Nexus 3164q
Cisco Nexus 3172
Cisco Nexus 3172pq-xl
Cisco Nexus 3172tq
Cisco Nexus 3172tq-32t
Cisco Nexus 3172tq-xl
Cisco Nexus 3232c
Cisco Nexus 3264q
Cisco Nexus 9000v
Cisco Nexus 92160yc-x
Cisco Nexus 92300yc
Cisco Nexus 92304qc
Cisco Nexus 9236c
Cisco Nexus 9272q
Cisco Nexus 93108tc-ex
Cisco Nexus 93120tx
Cisco Nexus 93128tx
Cisco Nexus 93180lc-ex
Cisco Nexus 93180yc-ex
Cisco Nexus 9332pq
Cisco Nexus 9372px
Cisco Nexus 9372px-e
Cisco Nexus 9372tx
Cisco Nexus 9372tx-e
Cisco Nexus 9396px
Cisco Nexus 9396tx
Cisco Nexus 9504
Cisco Nexus 9508
Cisco Nexus 9516

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Reference Links

Frequently Asked Questions

  • What is CVE-2018-0309?

    CVE-2018-0309 is a vulnerability in the implementation of a specific CLI command and the associated Simple Network Management Protocol (SNMP) MIB for Cisco NX-OS on Cisco Nexus 3000 and 9000 Series Switches.

  • What is the severity of CVE-2018-0309?

    The severity of CVE-2018-0309 is high, with a severity value of 7.7.

  • How does CVE-2018-0309 affect Cisco Nexus switches?

    CVE-2018-0309 affects Cisco Nexus 3000 and 9000 Series Switches running Cisco NX-OS.

  • How can an attacker exploit CVE-2018-0309?

    An authenticated, remote attacker can exploit CVE-2018-0309 to exhaust system memory on the affected Cisco Nexus switches.

  • Are there any fixes or patches for CVE-2018-0309?

    Yes, Cisco has released security advisories with fixes for CVE-2018-0309. Please refer to the Cisco Security Advisory for more information.

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