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Cisco Bug: CSCur14589 - vulnerability related to cmd injection via DHCP offer options

Last Modified

Jun 11, 2020

Products (1)

  • Cisco Nexus 7000 Series Switches

Known Affected Releases

7.1(0)D1(0.226) 7.3(0.2)

Description (partial)

Command injection via DHCP offer options used with PowerOn Auto Provisioning (POAP)

NX-OS Switch would have to be in a state where POAP is initiated, and if
an attacker can either:
A) Inject their own DHCP server and respond to the POAP DHCP request with
crafted DHCP options.
B) Compromise an existing DHCP server, and craft the specific DHCP

Then during the POAP process, when the crafted DHCP options are processed
arbitrary commands on the system could be executed in the context of root

Note this issue only occurs during the POAP DHCP boot process.

First Fixed Releases:

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