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 | ||
| Cisco Nexus 3100-z | ||
| Cisco Nexus 3100v | ||
| Cisco Nexus 3200 | ||
| Cisco Nexus 3400 | ||
| Cisco Nexus 3500 | ||
| Cisco Nexus 3524-x | ||
| Cisco Nexus 3524-xl | ||
| Cisco Nexus 3548-x | ||
| Cisco Nexus 3548-xl | ||
| Cisco Nexus 9000v | ||
| Cisco Nexus 92160yc-x | ||
| Cisco Nexus 92300yc | ||
| Cisco Nexus 92304qc | ||
| Cisco Nexus 92348gc-x | ||
| Cisco Nexus 9236c | ||
| Cisco Nexus 9272q | ||
| Cisco Nexus 93108tc-ex | ||
| Cisco Nexus 93108tc-fx | ||
| Cisco Nexus 93120tx | ||
| Cisco Nexus 93128tx | ||
| Cisco Nexus 93180lc-ex | ||
| Cisco Nexus 93180yc-ex | ||
| Cisco Nexus 93180yc-fx | ||
| Cisco Nexus 93216tc-fx2 | ||
| Cisco Nexus 93240yc-fx2 | ||
| Cisco Nexus 9332c | ||
| Cisco Nexus 9332pq | ||
| Cisco Nexus 93360yc-fx2 | ||
| Cisco Nexus 9336c-fx2 | ||
| Cisco Nexus 9336pq Aci Spine | ||
| Cisco Nexus 9348gc-fxp | ||
| Cisco Nexus 9364c | ||
| Cisco Nexus 9372px | ||
| Cisco Nexus 9372px-e | ||
| Cisco Nexus 9372tx | ||
| Cisco Nexus 9372tx-e | ||
| Cisco Nexus 9396px | ||
| Cisco Nexus 9396tx | ||
| Cisco Nx-os | >=8.1<8.3\(1\) | |
| Cisco Nexus 7000 | ||
| Cisco Nexus 7700 | ||
| Cisco Nx-os | >=7.0\(3\)<7.0\(3\)f3\(5\) | |
| Cisco Nexus 36180yc-r | ||
| Cisco Nexus 3636c-r | ||
| Cisco Nexus 9504 | ||
| Cisco Nexus 9508 | ||
| Cisco Nexus 9516 |
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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.
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- agent/references
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- agent/softwarecombine
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- source/MITRE
- agent/last-modified-date
- agent/title
- agent/weakness
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- agent/severity
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- agent/first-publish-date
- agent/event
- 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
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- canonical/cisco nexus 3100-z
- canonical/cisco nexus 3100v
- canonical/cisco nexus 3200
- canonical/cisco nexus 3400
- canonical/cisco nexus 3500
- canonical/cisco nexus 3524-x
- canonical/cisco nexus 3524-xl
- canonical/cisco nexus 3548-x
- canonical/cisco nexus 3548-xl
- canonical/cisco nexus 9000v
- canonical/cisco nexus 92160yc-x
- canonical/cisco nexus 92300yc
- canonical/cisco nexus 92304qc
- canonical/cisco nexus 92348gc-x
- canonical/cisco nexus 9236c
- canonical/cisco nexus 9272q
- canonical/cisco nexus 93108tc-ex
- canonical/cisco nexus 93108tc-fx
- canonical/cisco nexus 93120tx
- canonical/cisco nexus 93128tx
- canonical/cisco nexus 93180lc-ex
- canonical/cisco nexus 93180yc-ex
- canonical/cisco nexus 93180yc-fx
- canonical/cisco nexus 93216tc-fx2
- canonical/cisco nexus 93240yc-fx2
- canonical/cisco nexus 9332c
- canonical/cisco nexus 9332pq
- canonical/cisco nexus 93360yc-fx2
- canonical/cisco nexus 9336c-fx2
- canonical/cisco nexus 9336pq aci spine
- canonical/cisco nexus 9348gc-fxp
- canonical/cisco nexus 9364c
- canonical/cisco nexus 9372px
- canonical/cisco nexus 9372px-e
- canonical/cisco nexus 9372tx
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- canonical/cisco nexus 9396px
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- version/cisco nx-os/8.1
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- version/cisco nx-os/7.0\(3\)
- canonical/cisco nexus 36180yc-r
- canonical/cisco nexus 3636c-r
- canonical/cisco nexus 9504
- canonical/cisco nexus 9508
- canonical/cisco nexus 9516