critical
9
CWE
264
Advisory Published
Updated

CVE-2015-0721

First published: Thu Oct 06 2016(Updated: )

Cisco NX-OS 4.0 through 7.3 on Multilayer Director and Nexus 1000V, 2000, 3000, 3500, 4000, 5000, 5500, 5600, 6000, 7000, 7700, and 9000 devices allows remote authenticated users to bypass intended AAA restrictions and obtain privileged CLI access via crafted parameters in an SSH connection negotiation, aka Bug IDs CSCum35502, CSCuw78669, CSCuw79754, and CSCux88492.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco NX-OS=4.1.\(2\)
Cisco NX-OS=4.1.\(3\)
Cisco NX-OS=4.1.\(4\)
Cisco NX-OS=4.1.\(5\)
Cisco NX-OS=4.2\(3\)
Cisco NX-OS=4.2\(4\)
Cisco NX-OS=4.2\(6\)
Cisco NX-OS=4.2\(8\)
Cisco NX-OS=4.2.\(2a\)
Cisco NX-OS=5.0\(2a\)
Cisco NX-OS=5.0\(3\)
Cisco NX-OS=5.0\(5\)
Cisco NX-OS=5.1\(1\)
Cisco NX-OS=5.1\(1a\)
Cisco NX-OS=5.1\(3\)
Cisco NX-OS=5.1\(4\)
Cisco NX-OS=5.1\(5\)
Cisco NX-OS=5.1\(6\)
Cisco NX-OS=5.2\(1\)
Cisco NX-OS=5.2\(3a\)
Cisco NX-OS=5.2\(4\)
Cisco NX-OS=5.2\(5\)
Cisco NX-OS=5.2\(7\)
Cisco NX-OS=5.2\(9\)
Cisco NX-OS=6.0\(1\)
Cisco NX-OS=6.0\(2\)
Cisco NX-OS=6.0\(3\)
Cisco NX-OS=6.0\(4\)
Cisco NX-OS=6.1\(1\)
Cisco NX-OS=6.1\(2\)
Cisco NX-OS=6.1\(3\)
Cisco NX-OS=6.1\(4\)
Cisco NX-OS=6.1\(4a\)
Cisco NX-OS=6.2\(2\)
Cisco NX-OS=6.2\(2a\)
Cisco NX-OS=6.2\(6\)
Cisco NX-OS=6.2\(6b\)
Cisco NX-OS=6.2\(8\)
Cisco NX-OS=6.2\(8a\)
Cisco NX-OS=6.2\(8b\)
Cisco NX-OS=6.2\(10\)
Cisco NX-OS=base
Cisco Nexus 7000
Cisco Nexus 7000
Cisco Nexus 7000
Cisco Nexus 7000 9-Slot Firmware
Cisco Nexus 7700
Cisco Nexus 7700
Cisco Nexus 7700
Cisco Nexus 7700
Cisco NX-OS=4.1\(2\)e1\(1\)
Cisco NX-OS=4.1\(2\)e1\(1b\)
Cisco NX-OS=4.1\(2\)e1\(1d\)
Cisco NX-OS=4.1\(2\)e1\(1e\)
Cisco NX-OS=4.1\(2\)e1\(1f\)
Cisco NX-OS=4.1\(2\)e1\(1g\)
Cisco NX-OS=4.1\(2\)e1\(1h\)
Cisco NX-OS=4.1\(2\)e1\(1i\)
Cisco NX-OS=4.1\(2\)e1\(1j\)
Cisco Nexus 4001i
Cisco NX-OS=4.0\(0\)n1\(1a\)
Cisco NX-OS=4.0\(0\)n1\(2\)
Cisco NX-OS=4.0\(0\)n1\(2a\)
Cisco NX-OS=4.0\(1a\)n1\(1\)
Cisco NX-OS=4.0\(1a\)n1\(1a\)
Cisco NX-OS=4.0\(1a\)n2\(1\)
Cisco NX-OS=4.0\(1a\)n2\(1a\)
Cisco NX-OS=4.1\(3\)n1\(1\)
Cisco NX-OS=4.1\(3\)n1\(1a\)
Cisco NX-OS=4.1\(3\)n2\(1\)
Cisco NX-OS=4.1\(3\)n2\(1a\)
Cisco NX-OS=4.2\(1\)n1\(1\)
Cisco NX-OS=4.2\(1\)n2\(1\)
Cisco NX-OS=4.2\(1\)n2\(1a\)
Cisco NX-OS=5.0\(2\)n1\(1\)
Cisco NX-OS=5.0\(2\)n2\(1\)
Cisco NX-OS=5.0\(2\)n2\(1a\)
Cisco NX-OS=5.0\(3\)n1\(1c\)
Cisco NX-OS=5.0\(3\)n2\(1\)
Cisco NX-OS=5.0\(3\)n2\(2\)
Cisco NX-OS=5.0\(3\)n2\(2a\)
Cisco NX-OS=5.0\(3\)n2\(2b\)
Cisco NX-OS=5.1\(3\)n1\(1\)
Cisco NX-OS=5.1\(3\)n1\(1a\)
Cisco NX-OS=5.1\(3\)n2\(1\)
Cisco NX-OS=5.1\(3\)n2\(1a\)
Cisco NX-OS=5.1\(3\)n2\(1b\)
Cisco NX-OS=5.1\(3\)n2\(1c\)
Cisco NX-OS=5.2\(1\)n1\(1\)
Cisco NX-OS=5.2\(1\)n1\(1a\)
Cisco NX-OS=5.2\(1\)n1\(1b\)
Cisco NX-OS=5.2\(1\)n1\(2\)
Cisco NX-OS=5.2\(1\)n1\(2a\)
Cisco NX-OS=5.2\(1\)n1\(3\)
Cisco NX-OS=5.2\(1\)n1\(4\)
Cisco NX-OS=5.2\(1\)n1\(5\)
Cisco NX-OS=5.2\(1\)n1\(6\)
Cisco NX-OS=5.2\(1\)n1\(7\)
Cisco NX-OS=5.2\(1\)n1\(8\)
Cisco NX-OS=5.2\(1\)n1\(8a\)
Cisco NX-OS=6.0\(2\)n1\(1\)
Cisco NX-OS=6.0\(2\)n1\(2\)
Cisco NX-OS=6.0\(2\)n1\(2a\)
Cisco NX-OS=6.0\(2\)n2\(1\)
Cisco NX-OS=6.0\(2\)n2\(1b\)
Cisco NX-OS=6.0\(2\)n2\(2\)
Cisco NX-OS=6.0\(2\)n2\(4\)
Cisco NX-OS=6.0\(2\)n2\(5\)
Cisco NX-OS=7.0\(0\)n1\(1\)
Cisco NX-OS=7.0\(1\)n1\(1\)
Cisco NX-OS=7.0\(2\)n1\(1\)
Cisco NX-OS=7.0\(3\)n1\(1\)
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 NX-OS=6.0\(2\)n2\(3\)
Cisco Nexus 6001 Firmware
Cisco Nexus 6004 Firmware
Cisco NX-OS=4.0\(4\)sv1\(1\)
Cisco NX-OS=4.0\(4\)sv1\(2\)
Cisco NX-OS=4.0\(4\)sv1\(3\)
Cisco NX-OS=4.0\(4\)sv1\(3a\)
Cisco NX-OS=4.0\(4\)sv1\(3b\)
Cisco NX-OS=4.0\(4\)sv1\(3c\)
Cisco NX-OS=4.0\(4\)sv1\(3d\)
Cisco NX-OS=4.2\(1\)sv1\(4\)
Cisco NX-OS=4.2\(1\)sv1\(4a\)
Cisco NX-OS=4.2\(1\)sv1\(4b\)
Cisco NX-OS=4.2\(1\)sv1\(5.1\)
Cisco NX-OS=4.2\(1\)sv1\(5.1a\)
Cisco NX-OS=4.2\(1\)sv1\(5.2\)
Cisco NX-OS=4.2\(1\)sv1\(5.2b\)
Cisco NX-OS=4.2\(1\)sv2\(1.1\)
Cisco NX-OS=4.2\(1\)sv2\(1.1a\)
Cisco NX-OS=4.2\(1\)sv2\(2.1\)
Cisco NX-OS=4.2\(1\)sv2\(2.1a\)
Cisco NX-OS=5.2\(1\)sm1\(5.1\)
Microsoft Hyper-V
Cisco Nexus 1000V Switch for VMware vSphere
Cisco NX-OS=5.0\(3\)u1\(1\)
Cisco NX-OS=5.0\(3\)u1\(1a\)
Cisco NX-OS=5.0\(3\)u1\(1b\)
Cisco NX-OS=5.0\(3\)u1\(1d\)
Cisco NX-OS=5.0\(3\)u1\(2\)
Cisco NX-OS=5.0\(3\)u1\(2a\)
Cisco NX-OS=5.0\(3\)u2\(1\)
Cisco NX-OS=5.0\(3\)u2\(2\)
Cisco NX-OS=5.0\(3\)u2\(2a\)
Cisco NX-OS=5.0\(3\)u2\(2b\)
Cisco NX-OS=5.0\(3\)u2\(2c\)
Cisco NX-OS=5.0\(3\)u2\(2d\)
Cisco NX-OS=5.0\(3\)u3\(1\)
Cisco NX-OS=5.0\(3\)u3\(2\)
Cisco NX-OS=5.0\(3\)u3\(2a\)
Cisco NX-OS=5.0\(3\)u3\(2b\)
Cisco NX-OS=5.0\(3\)u4\(1\)
Cisco NX-OS=5.0\(3\)u5\(1\)
Cisco NX-OS=5.0\(3\)u5\(1a\)
Cisco NX-OS=5.0\(3\)u5\(1b\)
Cisco NX-OS=5.0\(3\)u5\(1c\)
Cisco NX-OS=5.0\(3\)u5\(1e\)
Cisco NX-OS=5.0\(3\)u5\(1f\)
Cisco NX-OS=5.0\(3\)u5\(1g\)
Cisco NX-OS=5.0\(3\)u5\(1h\)
Cisco NX-OS=6.0\(2\)u1\(1\)
Cisco NX-OS=6.0\(2\)u1\(1a\)
Cisco NX-OS=6.0\(2\)u1\(2\)
Cisco NX-OS=6.0\(2\)u1\(3\)
Cisco NX-OS=6.0\(2\)u1\(4\)
Cisco NX-OS=6.0\(2\)u2\(1\)
Cisco NX-OS=6.0\(2\)u2\(2\)
Cisco NX-OS=6.0\(2\)u2\(3\)
Cisco NX-OS=6.0\(2\)u2\(4\)
Cisco NX-OS=6.0\(2\)u2\(5\)
Cisco NX-OS=6.0\(2\)u2\(6\)
Cisco NX-OS=6.0\(2\)u3\(1\)
Cisco NX-OS=6.0\(2\)u3\(2\)
Cisco NX-OS=6.0\(2\)u3\(3\)
Cisco NX-OS=6.0\(2\)u3\(4\)
Cisco NX-OS=6.0\(2\)u3\(5\)
Cisco NX-OS=6.0\(2\)u4\(1\)
Cisco NX-OS=6.0\(2\)u4\(2\)
Cisco NX-OS=6.0\(2\)u4\(3\)
Cisco NX-OS=6.0\(2\)u5\(1\)
Cisco Nexus 3016Q Firmware
Cisco Nexus 3048 Firmware
Cisco Nexus 31108PC-V Firmware
Cisco Nexus 31108TC-V Firmware
Cisco Nexus 31128PQ
Cisco Nexus 3132Q-XL
Cisco Nexus 3132Q-V Firmware
Cisco Nexus 3164Q Firmware
Cisco Nexus 3172 Firmware
Cisco Nexus 3232C
Cisco Nexus 3264Q Firmware
Cisco Nexus 3524-xl
Cisco Nexus 3548-X/XL Firmware
Cisco NX-OS=6.1\(2\)i2\(1\)
Cisco NX-OS=6.1\(2\)i2\(2\)
Cisco NX-OS=6.1\(2\)i2\(2a\)
Cisco NX-OS=6.1\(2\)i2\(2b\)
Cisco NX-OS=6.1\(2\)i2\(3\)
Cisco NX-OS=6.1\(2\)i3\(1\)
Cisco NX-OS=6.1\(2\)i3\(2\)
Cisco NX-OS=6.1\(2\)i3\(3\)
Cisco NX-OS=11.0\(1b\)
Cisco NX-OS=11.0\(1c\)
Cisco Nexus 92160YC Switch
Cisco Nexus 92304QC Firmware
Cisco Nexus 9236C
Cisco Nexus 9272Q Switch
Cisco Nexus
Cisco Nexus 93120TX Firmware
Cisco Nexus 93128TX
Cisco Nexus 93180YC-EX-24
Cisco Nexus 9332PQ Firmware
Cisco Nexus N9336PQ-X
Cisco Nexus 9372PX-E
Cisco Nexus 9372TX Firmware
Cisco Nexus 9396PX Firmware
Cisco Nexus 9396TX Firmware
Cisco Nexus 9504 Firmware
Cisco Nexus 9508
Cisco Nexus 9516 firmware

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2015-0721?

    CVE-2015-0721 has a CVSS score indicating it is of high severity due to its potential to allow unauthorized privileged access.

  • How do I fix CVE-2015-0721?

    To fix CVE-2015-0721, update the affected Cisco NX-OS software to a version that has addressed this security vulnerability.

  • Which versions of Cisco NX-OS are affected by CVE-2015-0721?

    CVE-2015-0721 affects Cisco NX-OS versions from 4.0 through 7.3 on various Nexus device models.

  • What types of devices are vulnerable to CVE-2015-0721?

    CVE-2015-0721 affects various Cisco Nexus devices, including the Multilayer Director and models such as Nexus 1000V, 2000, 3000, and more.

  • Can CVE-2015-0721 lead to unauthorized access?

    Yes, CVE-2015-0721 can allow remote authenticated users to bypass AAA restrictions, potentially leading to unauthorized privileged CLI access.

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