CVE-2019-1596: Cisco NX-OS Software Bash Shell Privilege Escalation Vulnerability
First published: Thu Mar 07 2019(Updated: )
A vulnerability in the Bash shell implementation for Cisco NX-OS Software could allow an authenticated, local attacker to escalate their privilege level to root. The attacker must authenticate with valid user credentials. The vulnerability is due to incorrect permissions of a system executable. An attacker could exploit this vulnerability by authenticating to the device and entering a crafted command at the Bash prompt. A successful exploit could allow the attacker to escalate their privilege level to root. Nexus 3000 Series Switches are affected in versions prior to 7.0(3)I7(4). Nexus 3500 Platform Switches are affected in versions prior to 7.0(3)I7(4). Nexus 3600 Platform Switches are affected in versions prior to 7.0(3)F3(5). Nexus 9000 Series Switches in Standalone NX-OS Mode are affected in versions prior to 7.0(3)I7(4). Nexus 9500 R-Series Line Cards and Fabric Modules are affected in versions prior to 7.0(3)F3(5).
Credit: ykramarz@cisco.com ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Nx-os | <7.0\(3\)i4\(9\) | |
| Cisco Nx-os | >=7.0\(3\)i5<7.0\(3\)i7\(4\) | |
| Cisco Nexus 3000 | ||
| Cisco Nx-os | >=7.0\(3\)i7<7.0\(3\)i7\(4\) | |
| Cisco Nexus 3500 | ||
| Cisco Nx-os | >=7.0\(3\)f3\(1\)<7.0\(3\)f3\(5\) | |
| Cisco Nexus 3600 | ||
| Cisco Nexus 9000 | ||
| Cisco Nexus 9500 | ||
| All of | ||
| Any of | ||
| Cisco Nx-os | <7.0\(3\)i4\(9\) | |
| Cisco Nx-os | >=7.0\(3\)i5<7.0\(3\)i7\(4\) | |
| Cisco Nexus 3000 | ||
| All of | ||
| Cisco Nx-os | >=7.0\(3\)i7<7.0\(3\)i7\(4\) | |
| Cisco Nexus 3500 | ||
| All of | ||
| Cisco Nx-os | >=7.0\(3\)f3\(1\)<7.0\(3\)f3\(5\) | |
| Cisco Nexus 3600 | ||
| All of | ||
| Any of | ||
| Cisco Nx-os | <7.0\(3\)i4\(9\) | |
| Cisco Nx-os | >=7.0\(3\)i5<7.0\(3\)i7\(4\) | |
| Cisco Nexus 9000 | ||
| All of | ||
| Cisco Nx-os | >=7.0\(3\)f3\(1\)<7.0\(3\)f3\(5\) | |
| Cisco Nexus 9500 |
Remedy
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-nxos-pe
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Reference Links
Frequently Asked Questions
What is CVE-2019-1596?
CVE-2019-1596 is a vulnerability in the Bash shell implementation for Cisco NX-OS Software that allows an authenticated, local attacker to escalate their privilege level to root.
How can an attacker exploit CVE-2019-1596?
An attacker can exploit CVE-2019-1596 by authenticating with valid user credentials and leveraging incorrect permissions on a system executable.
What is the severity rating of CVE-2019-1596?
CVE-2019-1596 has a severity rating of 7.8 (high).
Which versions of Cisco NX-OS Software are affected by CVE-2019-1596?
Cisco NX-OS Software versions 7.0(3)i4(9) to 7.0(3)i7(4) are affected by CVE-2019-1596.
How can I fix CVE-2019-1596?
To fix CVE-2019-1596, users should apply the necessary patches and updates provided by Cisco.
- collector/nvd-index
- agent/references
- agent/weakness
- agent/type
- agent/remedy
- agent/severity
- agent/title
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/first-publish-date
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/last-modified-date
- agent/author
- agent/softwarecombine
- agent/tags
- agent/event
- vendor/cisco
- canonical/cisco nx-os
- version/cisco nx-os/7.0\(3\)i5
- canonical/cisco nexus 3000
- version/cisco nx-os/7.0\(3\)i7
- canonical/cisco nexus 3500
- version/cisco nx-os/7.0\(3\)f3\(1\)
- canonical/cisco nexus 3600
- canonical/cisco nexus 9000
- canonical/cisco nexus 9500