An exploitable denial of service vulnerability exists in the ENIP Request Path Logical Segment functionality of Allen-Bradley Flex IO 1794-AENT/B 4.003. A specially crafted network request can cause a loss of communications with the device resulting in denial-of-service. An attacker can send a malicious packet to trigger this vulnerability by sending an Electronic Key Segment with less than 0x18 bytes following the Key Format field.

An exploitable denial of service vulnerability exists in the ENIP Request Path Logical Segment functionality of Allen-Bradley Flex IO 1794-AENT/B 4.003. A specially crafted network request can cause a loss of communications with the device resulting in denial-of-service. An attacker can send a malicious packet to trigger this vulnerability by sending an Electronic Key Segment with less than 0x18 bytes following the Key Format field.

A buffer overflow vulnerability exists in the Ethernet/IP Request Path Port Segment. This vulnerability could allow a remote, unauthenticated attacker to send a malicious packet resulting in a denial-of-service condition on the device.CVE-2020-6083 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). A buffer overflow vulnerability exists in the Ethernet/IP Request Path Logical Segment. This vulnerability could allow a remote, unauthenticated attacker to send a malicious packet resulting in the device entering a fault state, causing a denial-of-service condition.CVE-2020-6084 and CVE-2020-6085 have been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). A buffer overflow vulnerability exists in the Ethernet/IP Request Path Data Segment. This vulnerability could allow a remote, unauthenticated attacker to send a malicious packet resulting in the device entering a fault state, causing a denial-of-service condition.CVE-2020-6086 and CVE-2020-6087 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).