CVE-2019-1730: Cisco NX-OS Software Bash Bypass Guest Shell Vulnerability
First published: Wed May 15 2019(Updated: )
A vulnerability in the Bash shell implementation for Cisco NX-OS Software could allow an authenticated, local attacker to bypass the limited command set of the restricted Guest Shell and execute commands at the privilege level of a network-admin user outside of the Guest Shell. The attacker must authenticate with valid administrator device credentials. The vulnerability is due to the incorrect implementation of a CLI command that allows a Bash command to be incorrectly invoked on the Guest Shell CLI. An attacker could exploit this vulnerability by authenticating to the device and entering a crafted command at the Guest Shell prompt. A successful exploit could allow the attacker to issue commands that should be restricted by a Guest Shell account.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco NX-OS | >=7.0\(3\)i4<7.0\(3\)i4\(9\) | |
| Cisco NX-OS | >=7.0\(3\)i7<7.0\(3\)i7\(4\) | |
| Cisco Nexus 3000 | ||
| Cisco Nexus 3100 Firmware | ||
| Cisco Nexus 3100-Z firmware | ||
| Cisco Nexus 3100V Firmware | ||
| Cisco Nexus 3200 | ||
| Cisco Nexus 3400 Firmware | ||
| Cisco Nexus 3500 Platform | ||
| Cisco Nexus 3524-xl | ||
| Cisco Nexus 3524-X/XL | ||
| Cisco Nexus 3548-X/XL | ||
| Cisco Nexus 3548-X/XL | ||
| Cisco NX-OS Nexus 9000 Series | ||
| Cisco Nexus 92160YC Switch | ||
| Cisco Nexus 92300YC Firmware | ||
| Cisco Nexus 92304QC Firmware | ||
| Cisco Nexus 92348GC-X Switch | ||
| Cisco Nexus 9236C | ||
| Cisco Nexus 9272Q Switch | ||
| Cisco Nexus | ||
| Cisco Nexus 93108TC-FX Switch | ||
| Cisco Nexus 93120TX Firmware | ||
| Cisco Nexus 93128TX | ||
| Cisco Nexus 9000 Series Switch | ||
| Cisco Nexus 93180YC-EX-24 | ||
| Cisco Nexus 93180YC-FX Firmware | ||
| Cisco Nexus 93216TC-FX2 Firmware | ||
| Cisco Nexus 93240YC-FX2 Firmware | ||
| Cisco Nexus 9332C Firmware | ||
| Cisco Nexus 9332PQ Firmware | ||
| Cisco Nexus 93360YC-FX2 | ||
| Cisco Nexus 9336C-FX2 Firmware | ||
| Cisco Nexus N9336PQ-X | ||
| Cisco Nexus 9348GC-FXP Firmware | ||
| Cisco Nexus 9364c-h1 | ||
| Cisco Nexus 9372PX-E | ||
| Cisco Nexus 9372PX-E Firmware | ||
| Cisco Nexus 9372TX Firmware | ||
| Cisco Nexus 9372TX-E Switch | ||
| Cisco Nexus 9396PX Firmware | ||
| Cisco Nexus 9396TX Firmware | ||
| Cisco NX-OS | >=8.1<8.3\(1\) | |
| Cisco Nexus 7000 Series Switch | ||
| Cisco Nexus 7700 Series Switch | ||
| Cisco NX-OS | >=7.0\(3\)<7.0\(3\)f3\(5\) | |
| Cisco Nexus 36180YC-R Firmware | ||
| Cisco Nexus 3636C-R Firmware | ||
| Cisco Nexus 9504 Firmware | ||
| Cisco Nexus 9508 | ||
| Cisco Nexus 9516 firmware |
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Reference Links
Frequently Asked Questions
What is CVE-2019-1730?
CVE-2019-1730 is a vulnerability in the Bash shell implementation for Cisco NX-OS Software that allows an authenticated, local attacker to bypass the limited command set of the restricted Guest Shell.
What is the severity of CVE-2019-1730?
The severity of CVE-2019-1730 is high with a CVSS score of 6.7.
How does CVE-2019-1730 impact Cisco NX-OS Software?
CVE-2019-1730 allows an attacker to execute commands at the privilege level of a network-admin user outside of the Guest Shell.
What is the affected software for CVE-2019-1730?
The affected software for CVE-2019-1730 is Cisco NX-OS Software versions 7.0(3)i4 through 7.0(3)i4(9) and 7.0(3)i7 through 7.0(3)i7(4).
How can I fix CVE-2019-1730?
To fix CVE-2019-1730, Cisco recommends upgrading to a fixed software release.
- agent/references
- agent/type
- agent/title
- agent/weakness
- agent/author
- agent/severity
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/first-publish-date
- agent/event
- agent/source
- agent/softwarecombine
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/cisco
- canonical/cisco nx-os
- version/cisco nx-os/7.0\(3\)i4
- version/cisco nx-os/7.0\(3\)i7
- canonical/cisco nexus 3000
- canonical/cisco nexus 3100 firmware
- canonical/cisco nexus 3100-z firmware
- canonical/cisco nexus 3100v firmware
- canonical/cisco nexus 3200
- canonical/cisco nexus 3400 firmware
- canonical/cisco nexus 3500 platform
- canonical/cisco nexus 3524-xl
- canonical/cisco nexus 3524-x/xl
- canonical/cisco nexus 3548-x/xl
- canonical/cisco nx-os nexus 9000 series
- canonical/cisco nexus 92160yc switch
- canonical/cisco nexus 92300yc firmware
- canonical/cisco nexus 92304qc firmware
- canonical/cisco nexus 92348gc-x switch
- canonical/cisco nexus 9236c
- canonical/cisco nexus 9272q switch
- canonical/cisco nexus
- canonical/cisco nexus 93108tc-fx switch
- canonical/cisco nexus 93120tx firmware
- canonical/cisco nexus 93128tx
- canonical/cisco nexus 9000 series switch
- canonical/cisco nexus 93180yc-ex-24
- canonical/cisco nexus 93180yc-fx firmware
- canonical/cisco nexus 93216tc-fx2 firmware
- canonical/cisco nexus 93240yc-fx2 firmware
- canonical/cisco nexus 9332c firmware
- canonical/cisco nexus 9332pq firmware
- canonical/cisco nexus 93360yc-fx2
- canonical/cisco nexus 9336c-fx2 firmware
- canonical/cisco nexus n9336pq-x
- canonical/cisco nexus 9348gc-fxp firmware
- canonical/cisco nexus 9364c-h1
- canonical/cisco nexus 9372px-e
- canonical/cisco nexus 9372px-e firmware
- canonical/cisco nexus 9372tx firmware
- canonical/cisco nexus 9372tx-e switch
- canonical/cisco nexus 9396px firmware
- canonical/cisco nexus 9396tx firmware
- version/cisco nx-os/8.1
- canonical/cisco nexus 7000 series switch
- canonical/cisco nexus 7700 series switch
- version/cisco nx-os/7.0\(3\)
- canonical/cisco nexus 36180yc-r firmware
- canonical/cisco nexus 3636c-r firmware
- canonical/cisco nexus 9504 firmware
- canonical/cisco nexus 9508
- canonical/cisco nexus 9516 firmware