CVE-2018-0136 is a denial-of-service vulnerability in the IPv6 subsystem of Cisco IOS XR Software Release 5.3.4 for specific Cisco Aggregation Services Router (ASR) 9000 Series models with Trident-based line cards. An unauthenticated, remote attacker can exploit this by sending specially crafted IPv6 packets with a fragment header extension, causing line card reloads. This vulnerability has a CVSS score of 8.6 (High), indicating a network-based attack with low complexity, requiring no privileges or user interaction, leading to a high impact on availability. While no public exploit code or active exploitation is reported, and community discussion is minimal, a software maintenance upgrade (SMU) and service pack 7 for IOS XR 5.3.4 address this issue.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
5.3.4CPE matchmatch criteria | cpe:2.3:o:cisco:ios_xr:5.3.4:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
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