Cisco FXOS and NX-OS Lightweight Directory Access Protocol Denial of Service Vulnerabilities
Published Mar 7, 2019
8.6
HIGHCVSS 3.0
EPSS 2.54%
Description
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).
Affected products
-
- Version unspecifiedStatusaffectedConstraints<3.2(2b)
- Version
-
- Version unspecifiedStatusaffectedConstraints<2.0.1.201
- Version unspecifiedStatusaffectedConstraints<2.2.2.54
- Version unspecifiedStatusaffectedConstraints<2.3.1.75
- Version
-
- Version unspecifiedStatusaffectedConstraints<2.0.1.201
- Version unspecifiedStatusaffectedConstraints<2.2.2.54
- Version unspecifiedStatusaffectedConstraints<2.3.1.75
- Version
-
- Version unspecifiedStatusaffectedConstraints<8.2(1)
- Version
-
- Version unspecifiedStatusaffectedConstraints<7.0(3)I7(1)
- Version
-
- Version unspecifiedStatusaffectedConstraints<7.0(3)I7(2)
- Version
-
- Version unspecifiedStatusaffectedConstraints<8.2(1)
- Version
-
- Version unspecifiedStatusaffectedConstraints<7.0(3)I7(1)
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cisco | Cisco UCS 6200 and 6300 Fabric Interconnect | n/a |
| ||||||||||||
| Cisco | Firepower 4100 Series Next-Generation Firewalls | n/a |
| ||||||||||||
| Cisco | Firepower 9300 Security Appliance | n/a |
| ||||||||||||
| Cisco | MDS 9000 Series Multilayer Switches | n/a |
| ||||||||||||
| Cisco | Nexus 3000 Series Switches | n/a |
| ||||||||||||
| Cisco | Nexus 3500 Platform Switches | n/a |
| ||||||||||||
| Cisco | Nexus 7000 and 7700 Series Switches | n/a |
| ||||||||||||
| Cisco | Nexus 9000 Series Switches in Standalone NX-OS Mode | n/a |
|
Configuration 1
- > 2.2.2.54 · < 2.3.1.75
Running on/with
- n/a
- n/a
Configuration 3
Running on/with
- n/a
Configuration 4
Running on/with
- n/a
Configuration 5
Running on/with
- n/a
- n/a
Configuration 6
Running on/with
- n/a
Configuration 7
- > 2.0.1.201 · < 2.2.2.54
Running on/with
- n/a
- n/a
Configuration 8
Running on/with
- n/a
- n/a
Configuration 9
Running on/with
- n/a
- n/a
Configuration 10
- < 2.0.1.201
Running on/with
- n/a
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
1 other source (CVE.org) ▾
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
AV:N/AC:L/Au:N/C:N/I:N/A:C
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed Nov 19, 2024 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (16 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.54% (0.02540) | 84.41th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.52% (0.02518) | 82.72th | v5 (v2026.06.15) |
| Nov 21, 2025 | 2.35% (0.02348) | 84.37th | v4 (v2025.03.14) |
| Nov 18, 2025 | 0.89% (0.00889) | 73.52th | v4 (v2025.03.14) |
| Mar 19, 2025 | 2.06% (0.02056) | 81.98th | v4 (v2025.03.14) |
| Jul 20, 2024 | 0.16% (0.00157) | 52.52th | v3 (v2023.03.01) |
| Jun 14, 2024 | 0.16% (0.00157) | 52.25th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.16% (0.00157) | 50.24th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.05% (0.01055) | 52.13th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.05% (0.01055) | 50.47th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.05% (0.01055) | 48.43th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.50% (0.04499) | 74.08th | v2 (v2022.01.01) |
| Feb 3, 2022 | 4.24% (0.04237) | 74.61th | v1 |
| Jan 6, 2022 | 4.24% (0.04237) | 74.40th | v1 |
| Sep 1, 2021 | 0.98% (0.00976) | 61.78th | v1 |
| Apr 14, 2021 | 0.98% (0.00976) | 0.00th | v1 |
References (2)
- http://www.securityfocus.com/bid/107394 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-nxosldap vendor-advisoryx_refsource_CISCOPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/107394 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-nxosldap | vendor-advisoryx_refsource_CISCOPatchVendor Advisory |
Change history (0)
No recorded changes yet.