Vulnerability identifier: #VU49026
Vulnerability risk: Low
CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID:
CWE-ID:
CWE-190
Exploitation vector: Local network
Exploit availability: No
Vulnerable software:
Cisco FXOS
Operating systems & Components /
Operating system
Cisco IOS XR
Operating systems & Components /
Operating system
Cisco NX-OS
Operating systems & Components /
Operating system
Cisco MDS 9000 Series Multilayer Switches
Hardware solutions /
Routers & switches, VoIP, GSM, etc
Cisco IOS XRv 9000 Router
Hardware solutions /
Routers & switches, VoIP, GSM, etc
Cisco ASR 9000 Series Aggregation Services Routers
Hardware solutions /
Routers & switches, VoIP, GSM, etc
Cisco Network Convergence System 6000 Series Routers
Hardware solutions /
Routers & switches, VoIP, GSM, etc
Network Convergence System 5500 Series
Hardware solutions /
Routers & switches, VoIP, GSM, etc
Cisco Network Convergence System 5000 Series
Hardware solutions /
Routers & switches, VoIP, GSM, etc
Cisco Network Convergence System 560 Series Routers
Hardware solutions /
Routers & switches, VoIP, GSM, etc
Cisco Network Convergence System 540 Series Routers
Hardware solutions /
Routers & switches, VoIP, GSM, etc
Cisco Nexus 9000 Series Switches NX-OS Mode
Hardware solutions /
Routers & switches, VoIP, GSM, etc
Cisco Nexus 9000 Series Switches in ACI Mode
Hardware solutions /
Routers & switches, VoIP, GSM, etc
Cisco Nexus 7000 Series Switches
Hardware solutions /
Routers & switches, VoIP, GSM, etc
Cisco Nexus 6000 Series Switches
Hardware solutions /
Routers & switches, VoIP, GSM, etc
Nexus 5600 Platform Switches
Hardware solutions /
Routers & switches, VoIP, GSM, etc
Nexus 5500 Platform Switches
Hardware solutions /
Routers & switches, VoIP, GSM, etc
Cisco Nexus 3000 Series Switches
Hardware solutions /
Routers & switches, VoIP, GSM, etc
Nexus 1000V Switch for VMware vSphere
Hardware solutions /
Routers & switches, VoIP, GSM, etc
Nexus 1000V Switch for Microsoft Hyper-V
Hardware solutions /
Routers & switches, VoIP, GSM, etc
UCS 6400 Series Fabric Interconnects
Hardware solutions /
Routers & switches, VoIP, GSM, etc
UCS 6300 Series Fabric Interconnects
Hardware solutions /
Routers & switches, VoIP, GSM, etc
UCS 6200 Series Fabric Interconnects
Hardware solutions /
Routers & switches, VoIP, GSM, etc
Cisco Firepower 9300 Security Appliance
Hardware solutions /
Security hardware applicances
Cisco Firepower 4100 Series Next-Generation Firewall
Hardware solutions /
Firmware
Cisco Carrier Routing System
Hardware solutions /
Firmware
Cisco Network Convergence System 1000 Series
Hardware solutions /
Firmware
Nexus 1000 Virtual Edge for VMware vSphere
Server applications /
Other server solutions
Vendor: Cisco Systems, Inc
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to integer overflow in the Cisco Discovery Protocol implementation. A remote attacker on the local network can send a specially crafted Cisco Discovery Protocol packet, trigger integer overflow and cause a denial of service condition on the target system.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Cisco FXOS: 2.2 - 2.7
Cisco IOS XR: 5.2.5, 6.4.2, 6.5.3, 6.6 - 6.6.25, 7.0 - 7.0.1
Cisco NX-OS: 5.2 - 14.2
Cisco MDS 9000 Series Multilayer Switches: 6.2.1 - 8.4.2.9
Cisco IOS XRv 9000 Router: All versions
Cisco Firepower 9300 Security Appliance: 2.4.200.10
Cisco Firepower 4100 Series Next-Generation Firewall: All versions
Cisco Carrier Routing System: All versions
Cisco ASR 9000 Series Aggregation Services Routers: 6.1.3
Cisco Network Convergence System 6000 Series Routers: All versions
Network Convergence System 5500 Series: All versions
Cisco Network Convergence System 5000 Series: All versions
Cisco Network Convergence System 1000 Series: All versions
Cisco Network Convergence System 560 Series Routers: All versions
Cisco Network Convergence System 540 Series Routers: All versions
Cisco Nexus 9000 Series Switches NX-OS Mode: All versions
Cisco Nexus 9000 Series Switches in ACI Mode: All versions
Cisco Nexus 7000 Series Switches: All versions
Cisco Nexus 6000 Series Switches: All versions
Nexus 5600 Platform Switches: All versions
Nexus 5500 Platform Switches: All versions
Cisco Nexus 3000 Series Switches: All versions
Nexus 1000V Switch for VMware vSphere: 5.2.1 SV5.1.2
Nexus 1000V Switch for Microsoft Hyper-V: All versions
Nexus 1000 Virtual Edge for VMware vSphere: All versions
UCS 6400 Series Fabric Interconnects: 3.2 - 4.0
UCS 6300 Series Fabric Interconnects: 3.2 - 4.0
UCS 6200 Series Fabric Interconnects: 3.2 - 4.0
External links
https://packetstormsecurity.com/files/156203/Cisco-Discovery-Protocol-CDP-Remote-Device-Takeover.html
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200205-fxnxos-iosxr-cdp-dos
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.