CVE Vulnerability Advisory Database
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Cisco IOS and IOS XE DHCPv4 Option 82 Input Validation Remote Denial of Service Vulnerability (CVE-2018-0173)
[Affected Scope] Cisco devices running Cisco IOS and IOS XE Software with encapsulated DHCPv4 Option 82 restoration enabled
[Impact] An unauthenticated, remote attacker can cause an affected device to reload, resulting in a complete Denial of Service (DoS) condition
[Mitigation] Apply official software updates from Cisco or implement workarounds by hardening DHCP snooping and relay configurations
Cisco IOS and IOS XE DHCP Option 82 Encapsulation Heap Overflow Vulnerability (CVE-2018-0172) Analysis and Mitigation Guide
[Affected Scope] Cisco IOS and IOS XE Software with DHCP Option 82 relay functionality enabled
[Impact] Unauthenticated, remote attackers can trigger a heap overflow and force a device reload, leading to a complete Denial of Service (DoS)
[Mitigation] Apply official Cisco software updates immediately, or disable DHCP Option 82 relay features and restrict untrusted DHCP traffic