The vulnerability of the DHCP server service in the Cisco IOS XR operating system allows a attacker to cause a failure in the dhcpd process.

The vulnerability of the Cisco IOS XR operating system’s DHCP server is related to errors in processing DHCPv4 messages. Exploiting this vulnerability can allow a malicious actor to cause failures in the dhcpd process from a remote location...

Cisco IOS XR Software DHCP Version 4 Server DoS (cisco-sa-iosxr-dhcp-dos-pjPVReLU)

According to its self-reported version, Cisco IOS XR is affected by a vulnerability in the DHCP version 4 DHCPv4 server feature that allows an unauthenticated, remote attacker to trigger a crash of the dhcpd process, resulting in a denial of service DoS condition. This vulnerability exists becaus...

CVE-2021-34737

A vulnerability in the DHCP version 4 DHCPv4 server feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to trigger a crash of the dhcpd process, resulting in a denial of service DoS condition. This vulnerability exists because certain DHCPv4 messages are improperly...

Null pointer dereference

A vulnerability in the DHCP version 4 DHCPv4 server feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to trigger a crash of the dhcpd process, resulting in a denial of service DoS condition. This vulnerability exists because certain DHCPv4 messages are improperly...

CVE-2021-34737

Cisco IOS XR Software DHCPv4 server is affected by CVE-2021-34737. Improper validation of certain DHCPv4 messages can allow an unauthenticated remote attacker to trigger a crash of the dhcpd process, causing a DoS. The crash results from a NULL pointer dereference; during the dhcpd restart (up to...

CVE-2021-34737 Cisco IOS XR Software DHCP Version 4 Server Denial of Service Vulnerability

A vulnerability in the DHCP version 4 DHCPv4 server feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to trigger a crash of the dhcpd process, resulting in a denial of service DoS condition. This vulnerability exists because certain DHCPv4 messages are improperly...

CVE-2021-34737 Cisco IOS XR Software DHCP Version 4 Server Denial of Service Vulnerability

A vulnerability in the DHCP version 4 DHCPv4 server feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to trigger a crash of the dhcpd process, resulting in a denial of service DoS condition. This vulnerability exists because certain DHCPv4 messages are improperly...

Cisco IOS XR Software DHCP Version 4 Server Denial of Service Vulnerability

A vulnerability in the DHCP version 4 DHCPv4 server feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to trigger a crash of the dhcpd process, resulting in a denial of service DoS condition. This vulnerability exists because certain DHCPv4 messages are improperly...

CVE-2021-34737

A vulnerability in the DHCP version 4 DHCPv4 server feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to trigger a crash of the dhcpd process, resulting in a denial of service DoS condition. This vulnerability exists because certain DHCPv4 messages are improperly...

Amazon Linux AMI : dhcp (ALAS-2021-1510)

The version of dhcp installed on the remote host is prior to 4.1.1-53.P1.29. It is, therefore, affected by a vulnerability as referenced in the ALAS-2021-1510 advisory. A flaw was found in the Dynamic Host Configuration Protocol DHCP. There is a discrepancy between the code that handles...

Oracle Linux 8 : dhcp (ELSA-2021-2359)

The remote Oracle Linux 8 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2021-2359 advisory. 12:4.3.6-44.1 - Fix for CVE-2021-25217 Tenable has extracted the preceding description block directly from the Oracle Linux security advisory. Note that Nessus...

CVE-2021-25217

In ISC DHCP 4.1-ESV-R1 - 4.1-ESV-R16, ISC DHCP 4.4.0 - 4.4.2 Other branches of ISC DHCP i.e., releases in the 4.0.x series or lower and releases in the 4.3.x series are beyond their End-of-Life EOL and no longer supported by ISC. From inspection it is clear that the defect is also present in...

CVE-2021-25217

In ISC DHCP 4.1-ESV-R1 - 4.1-ESV-R16, ISC DHCP 4.4.0 - 4.4.2 Other branches of ISC DHCP i.e., releases in the 4.0.x series or lower and releases in the 4.3.x series are beyond their End-of-Life EOL and no longer supported by ISC. From inspection it is clear that the defect is also present in...

CVE-2021-25217

In ISC DHCP 4.1-ESV-R1 - 4.1-ESV-R16, ISC DHCP 4.4.0 - 4.4.2 Other branches of ISC DHCP i.e., releases in the 4.0.x series or lower and releases in the 4.3.x series are beyond their End-of-Life EOL and no longer supported by ISC. From inspection it is clear that the defect is also present in...

CVE-2020-1661

On Juniper Networks Junos OS devices configured as a DHCP forwarder, the Juniper Networks Dynamic Host Configuration Protocol Daemon jdhcp process might crash when receiving a malformed DHCP packet. This issue only affects devices configured as DHCP forwarder with forward-only option, that forwar...

Design/Logic Flaw

On Juniper Networks Junos OS devices configured as a DHCP forwarder, the Juniper Networks Dynamic Host Configuration Protocol Daemon jdhcp process might crash when receiving a malformed DHCP packet. This issue only affects devices configured as DHCP forwarder with forward-only option, that forwar...

CVE-2020-3509

A vulnerability in the DHCP message handler of Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers could allow an unauthenticated, remote attacker to cause the supervisor to crash, which could result in a denial of service DoS condition. The vulnerability is due to insufficient erro...

Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers DHCP Denial of Service Vulnerability

A vulnerability in the DHCP message handler of Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers could allow an unauthenticated, remote attacker to cause the supervisor to crash, which could result in a denial of service DoS condition. The vulnerability is due to insufficient erro...

NetworkManager security and bug fix update

1:1.22.8-5 - dhcp: fix handling IO error in nettools DHCPv4 client rh 1843357 - ifcfg-rh: handle '802-1x.,phase2-ca-path' rh 1843360, CVE-2020-10754...

Cisco Ios Improper Input Validation

A vulnerability in the DHCP option 82 encapsulation functionality of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service DoS condition. The vulnerability exists because the affected...