Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU46104
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-3517
CWE-ID:
CWE-476 - NULL Pointer Dereference
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in the Cisco Fabric Services component . A remote attacker can send malicious Cisco Fabric Services messages and perform a denial of service (DoS) attack.
MitigationInstall updates from vendor's website.
Vulnerable software versionsCisco FXOS: 1.1 - 2.2
Cisco NX-OS: All versions
Cisco Firepower 4100 Series Next-Generation Firewall: 2.7.1.122
Cisco Firepower 9300 Security Appliance: 2.7.1.122
Cisco MDS 9000 Series Multilayer Switches: 8.4.1
Cisco Nexus 3000 Series Switches: before 8.2.6
Cisco Nexus 5500 Series Switches: 7.3.7 N1.0.786
Cisco Nexus 5600 Series Switches: 7.3.7 N1.0.786
Cisco Nexus 6000 Series Switches: 7.3.7 N1.0.786
Cisco Nexus 7000 Series Switches: 8.4.1
Cisco Nexus 9000 Series Switches NX-OS Mode: before 8.2.6
UCS 6200 Series Fabric Interconnects: 4.1.1
UCS 6300 Series Fabric Interconnects: 4.1.1
UCS 6400 Series Fabric Interconnects: 4.1.1
External linksQ & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.