Cisco IOS XE Software Vulnerability Could Lead to Denial of Service

CVE-2024-20467

Summary

A vulnerability exists in the IPv4 fragmentation reassembly code of Cisco IOS XE Software, which may allow an unauthenticated, remote attacker to exploit this flaw and trigger a denial of service (DoS) on impacted devices. This issue stems from inadequate resource management during the process of fragment reassembly. By sending specifically sized fragmented packets or through a Virtual Fragmentation Reassembly (VFR)-enabled interface, an attacker could potentially induce a device reload, leading to service interruptions. The specific Cisco products affected include the ASR 1000 Series Aggregation Services Routers and cBR-8 Converged Broadband Routers operating on software versions 17.12.1 and 17.12.1a.

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