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TI-2018-00264 Aliases CVE-2018-0305GHSA-f684-4cqg-v8mf

NULL pointer dereference in Cisco FXOS and NX-OS unknown

Priority MEDIUM 48CWE-476Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-476.

Summary

A vulnerability in the Cisco Fabric Services component of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on the affected device. The vulnerability exists because the affected software insufficiently validates Cisco Fabric Services packets. An attacker could exploit this vulnerability by sending a crafted Cisco Fabric Services packet to an affected device. A successful exploit could allow the attacker to force a NULL pointer dereference and cause a DoS condition. This vulnerability affects the following if configured to use Cisco Fabric Services: Firepower 4100 Series Next-Generation Firewalls, Firepower 9300 Security Appliance, MDS 9000 Series Multilayer Switches, Nexus 2000 Series Fabric Extenders, Nexus 3000 Series Switches, Nexus 3500 Platform Switches, Nexus 5500 Platform Switches, Nexus 5600 Platform Switches, Nexus 6000 Series Switches, Nexus 7000 Series Switches, Nexus 7700 Series Switches, Nexus 9000 Series Switches in standalone NX-OS mode, Nexus 9500 R-Series Line Cards and Fabric Modules, UCS 6100 Series Fabric Interconnects, UCS 6200 Series Fabric Interconnects, UCS 6300 Series Fabric Interconnects. Cisco Bug IDs: CSCvd69966, CSCve02435, CSCve04859, CSCve41590, CSCve41593, CSCve41601.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.02189 82nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
—Cisco FXOS and NX-OS unknownCisco FXOS and NX-OS unknown—No fix listedCNA
  • Cisco FXOS and NX-OS unknown Vendor— Affected Cisco FXOS and NX-OS unknown Fixed in — No fix listed CNA

CPE configurations NVD · 15

CPEVersionsRoleVendor
cpe:2.3:o:cisco:nexus_7000_firmware:8.0\(1\):*:*:*:*:*:*:*8.0(1)VulnerableCisco
cpe:2.3:h:cisco:nexus_7000:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:nexus_5000_firmware:7.0\(0\)hsk\(0.357\):*:*:*:*:*:*:*7.0(0)hsk(0.357)VulnerableCisco
cpe:2.3:o:cisco:nexus_5000_firmware:8.1\(0.2\)s0:*:*:*:*:*:*:*8.1(0.2)s0VulnerableCisco
cpe:2.3:o:cisco:nexus_5000_firmware:8.8\(0.1\):*:*:*:*:*:*:*8.8(0.1)VulnerableCisco
cpe:2.3:h:cisco:nexus_5000:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:firepower_9000_firmware:r211:*:*:*:*:*:*:*r211VulnerableCisco
cpe:2.3:o:cisco:firepower_9000_firmware:r231:*:*:*:*:*:*:*r231VulnerableCisco
cpe:2.3:h:cisco:firepower_9000:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:nexus_9000_firmware:8.1\(0\)bd\(0.20\):*:*:*:*:*:*:*8.1(0)bd(0.20)VulnerableCisco
  • cpe:2.3:o:cisco:nexus_7000_firmware:8.0\(1\):*:*:*:*:*:*:* Versions 8.0(1) Vulnerable ·Cisco
  • cpe:2.3:h:cisco:nexus_7000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:o:cisco:nexus_5000_firmware:7.0\(0\)hsk\(0.357\):*:*:*:*:*:*:* Versions 7.0(0)hsk(0.357) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:nexus_5000_firmware:8.1\(0.2\)s0:*:*:*:*:*:*:* Versions 8.1(0.2)s0 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:nexus_5000_firmware:8.8\(0.1\):*:*:*:*:*:*:* Versions 8.8(0.1) Vulnerable ·Cisco
  • cpe:2.3:h:cisco:nexus_5000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:o:cisco:firepower_9000_firmware:r211:*:*:*:*:*:*:* Versions r211 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:firepower_9000_firmware:r231:*:*:*:*:*:*:* Versions r231 Vulnerable ·Cisco
  • cpe:2.3:h:cisco:firepower_9000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:o:cisco:nexus_9000_firmware:8.1\(0\)bd\(0.20\):*:*:*:*:*:*:* Versions 8.1(0)bd(0.20) Vulnerable ·Cisco
Show 5 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:cisco:nexus_9000_firmware:8.1\(1\)s5:*:*:*:*:*:*:*8.1(1)s5VulnerableCisco
cpe:2.3:h:cisco:nexus_9000:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:unified_computing_system_firmware:3.1\(3a\)a:*:*:*:*:*:*:*3.1(3a)aVulnerableCisco
cpe:2.3:o:cisco:unified_computing_system_firmware:7.0\(0\)hsk\(0.357\):*:*:*:*:*:*:*7.0(0)hsk(0.357)VulnerableCisco
cpe:2.3:h:cisco:unified_computing_system:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
  • cpe:2.3:o:cisco:nexus_9000_firmware:8.1\(1\)s5:*:*:*:*:*:*:* Versions 8.1(1)s5 Vulnerable ·Cisco
  • cpe:2.3:h:cisco:nexus_9000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:o:cisco:unified_computing_system_firmware:3.1\(3a\)a:*:*:*:*:*:*:* Versions 3.1(3a)a Vulnerable ·Cisco
  • cpe:2.3:o:cisco:unified_computing_system_firmware:7.0\(0\)hsk\(0.357\):*:*:*:*:*:*:* Versions 7.0(0)hsk(0.357) Vulnerable ·Cisco
  • cpe:2.3:h:cisco:unified_computing_system:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-0305
  2. 2026-10-03 Alias added: GHSA-f684-4cqg-v8mf

References

Advisory 1

  • TI-2018-00263 Improper input validation in Cisco FXOS and NX-OS unknown CVSS 3.0CRITICAL 9.8
  • TI-2018-00273 Improper input validation in Cisco FXOS and NX-OS unknown CVSS 3.0CRITICAL 9.8
  • TI-2018-00271 Improper input validation in Cisco FXOS and NX-OS unknown CVSS 3.0CRITICAL 9.8
  • TI-2018-00267 Improper input validation in Cisco FXOS and NX-OS unknown CVSS 3.0CRITICAL 9.8
  • TI-2019-01275 Cisco Secure Boot Hardware Tampering Vulnerability CVSS 3.1MEDIUM 6.7
  • TI-2019-01326 Resource management flaw in Cisco Firepower Extensible Operating System CVSS 3.0MEDIUM 6.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences