high
7.8
CWE
399
Advisory Published
Updated

CVE-2015-6393

First published: Thu Oct 06 2016(Updated: )

Cisco NX-OS 4.1 through 7.3 and 11.0 through 11.2 on Nexus 2000, 3000, 3500, 5000, 5500, 5600, 6000, 7000, 7700, and 9000 devices allows remote attackers to cause a denial of service (device crash) via malformed IPv4 DHCP packets to the DHCPv4 relay agent, aka Bug IDs CSCuq39250, CSCus21733, CSCus21739, CSCut76171, and CSCux67182.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
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\(2a\)
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\(2\)n1\(2\)
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\(3\)
Cisco NX-OS=6.0\(2\)n2\(4\)
Cisco NX-OS=6.0\(2\)n2\(5\)
Cisco NX-OS=6.0\(2\)n2\(5a\)
Cisco NX-OS=6.0\(2\)n2\(6\)
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 NX-OS=7.0\(4\)n1\(1\)
Cisco NX-OS=7.0\(5\)n1\(1\)
Cisco NX-OS=7.0\(5\)n1\(1a\)
Cisco NX-OS=7.1\(0\)n1\(1a\)
Cisco NX-OS=7.1\(0\)n1\(1b\)
Cisco Nexus 6001 Firmware
Cisco Nexus 6004 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=6.1\(2\)i3\(3.78\)
Cisco NX-OS=6.1\(2\)i3\(4\)
Cisco NX-OS=7.0\(3\)
Cisco Nexus 93128 Firmware
Cisco Nexus 9396PX Firmware
Cisco Nexus 9396TX Firmware
Cisco Nexus 9504 Firmware
Cisco Nexus 9508
Cisco Nexus 9516 firmware
Cisco Nexus N9336PQ-X
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=6.1\(5\)
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=6.2\(12\)
Cisco NX-OS=6.2\(14\)s1
Cisco NX-OS=7.2\(0\)n1\(0.1\)
Cisco Nexus 7004 Firmware
Cisco Nexus 7009 Firmware
Cisco Nexus 7010 Firmware
Cisco Nexus 7018 Firmware
Cisco Nexus 7702 firmware
Cisco Nexus 7700
Cisco Nexus 7710 Firmware
Cisco Nexus 7718 firmware

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2015-6393?

    The severity of CVE-2015-6393 is considered critical as it allows remote attackers to cause a denial of service by sending malformed DHCP packets.

  • How do I fix CVE-2015-6393?

    To fix CVE-2015-6393, upgrade your Cisco NX-OS to a version that is not affected by this vulnerability.

  • Which devices are affected by CVE-2015-6393?

    CVE-2015-6393 affects various Cisco Nexus devices running NX-OS versions 4.1 through 7.3 and 11.0 through 11.2.

  • What types of attacks does CVE-2015-6393 enable?

    CVE-2015-6393 enables remote denial of service attacks via malformed DHCP packets targeting the DHCPv4 relay agent.

  • Is there a workaround for CVE-2015-6393?

    There are no specific workarounds mentioned for CVE-2015-6393; the recommended action is to apply the appropriate software updates.

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