CVE-2019-1597: Cisco FXOS and NX-OS Lightweight Directory Access Protocol Denial of Service Vulnerabilities
First published: Thu Mar 07 2019(Updated: )
Multiple vulnerabilities in the implementation of the Lightweight Directory Access Protocol (LDAP) feature in Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerabilities are due to the improper parsing of LDAP packets by an affected device. An attacker could exploit these vulnerabilities by sending an LDAP packet crafted using Basic Encoding Rules (BER) to an affected device. The LDAP packet must have a source IP address of an LDAP server configured on the targeted device. A successful exploit could cause the affected device to reload, resulting in a DoS condition. Firepower 4100 Series Next-Generation Firewalls are affected in versions prior to 2.0.1.201, 2.2.2.54, and 2.3.1.75. Firepower 9300 Security Appliances are affected in versions prior to 2.0.1.201, 2.2.2.54 and 2.3.1.75. MDS 9000 Series Multilayer Switches are affected in versions prior to 8.2(1). Nexus 3000 Series Switches are affected in versions prior to 7.0(3)I7(1). Nexus 3500 Platform Switches are affected in versions prior to 7.0(3)I7(2). Nexus 7000 and 7700 Series Switches are affected in versions prior to 8.2(1). Nexus 9000 Series Switches in Standalone NX-OS Mode are affected in versions prior to 7.0(3)I7(1). Cisco UCS 6200 and 6300 Fabric Interconnect devices are affected in versions prior to 3.2(2b).
Credit: ykramarz@cisco.com ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Firepower Extensible Operating System | >2.2.2.54<2.3.1.75 | |
| Cisco Firepower 4100 | ||
| Cisco Firepower 9300 | ||
| Cisco Nx-os | <8.2\(1\) | |
| Cisco MDS 9000 | ||
| Cisco Nx-os | <7.0\(3\)i7\(1\) | |
| Cisco Nexus 3000 | ||
| Cisco Nx-os | <7.0\(3\)i7\(2\) | |
| Cisco Nexus 3500 | ||
| Cisco Nx-os | >7.3\(2\)d1\(1\)<8.2\(1\) | |
| Cisco Nexus 7000 | ||
| Cisco Nexus 7700 | ||
| Cisco Nexus 9000 | ||
| Cisco Firepower Extensible Operating System | >2.0.1.201<2.2.2.54 | |
| Cisco Nx-os | >6.2\(20\)<7.3\(2\)d1\(1\) | |
| Cisco Nx-os | <6.2\(20\) | |
| Cisco Firepower Extensible Operating System | <2.0.1.201 | |
| Cisco Nx-os | <3.2\(2b\) | |
| Cisco UCS 6200 | ||
| Cisco Ucs 6300 | ||
| All of | ||
| Cisco Firepower Extensible Operating System | >2.2.2.54<2.3.1.75 | |
| Any of | ||
| Cisco Firepower 4100 | ||
| Cisco Firepower 9300 | ||
| All of | ||
| Cisco Nx-os | <8.2\(1\) | |
| Cisco MDS 9000 | ||
| All of | ||
| Cisco Nx-os | <7.0\(3\)i7\(1\) | |
| Cisco Nexus 3000 | ||
| All of | ||
| Cisco Nx-os | <7.0\(3\)i7\(2\) | |
| Cisco Nexus 3500 | ||
| All of | ||
| Cisco Nx-os | >7.3\(2\)d1\(1\)<8.2\(1\) | |
| Any of | ||
| Cisco Nexus 7000 | ||
| Cisco Nexus 7700 | ||
| All of | ||
| Cisco Nx-os | <7.0\(3\)i7\(1\) | |
| Cisco Nexus 9000 | ||
| All of | ||
| Cisco Firepower Extensible Operating System | >2.0.1.201<2.2.2.54 | |
| Any of | ||
| Cisco Firepower 4100 | ||
| Cisco Firepower 9300 | ||
| All of | ||
| Cisco Nx-os | >6.2\(20\)<7.3\(2\)d1\(1\) | |
| Any of | ||
| Cisco Nexus 7000 | ||
| Cisco Nexus 7700 | ||
| All of | ||
| Cisco Nx-os | <6.2\(20\) | |
| Any of | ||
| Cisco Nexus 7000 | ||
| Cisco Nexus 7700 | ||
| All of | ||
| Cisco Firepower Extensible Operating System | <2.0.1.201 | |
| Any of | ||
| Cisco Firepower 4100 | ||
| Cisco Firepower 9300 | ||
| All of | ||
| Cisco Nx-os | <3.2\(2b\) | |
| Any of | ||
| Cisco UCS 6200 | ||
| Cisco Ucs 6300 |
Remedy
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-nxosldap
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2019-1597?
The severity of CVE-2019-1597 is high.
What is the affected software for CVE-2019-1597?
The affected software for CVE-2019-1597 includes Cisco FXOS Software and Cisco NX-OS Software.
What is the impact of CVE-2019-1597?
The impact of CVE-2019-1597 is a denial of service (DoS) condition, which can cause an affected device to reload.
How can an unauthenticated, remote attacker exploit CVE-2019-1597?
An unauthenticated, remote attacker can exploit CVE-2019-1597 by sending specially crafted Lightweight Directory Access Protocol (LDAP) requests to the affected device.
Where can I find more information about CVE-2019-1597?
You can find more information about CVE-2019-1597 on the SecurityFocus and Cisco Security Advisory websites.
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