CVE-2019-1918
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
07/08/2019
Last modified:
16/10/2020
Description
A vulnerability in the implementation of Intermediate System–to–Intermediate System (IS–IS) routing protocol functionality in Cisco IOS XR Software could allow an unauthenticated attacker who is in the same IS-IS area to cause a denial of service (DoS) condition. The vulnerability is due to incorrect processing of IS–IS link-state protocol data units (PDUs). An attacker could exploit this vulnerability by sending specific link-state PDUs to an affected system to be processed. A successful exploit could allow the attacker to cause incorrect calculations used in the weighted remote shared risk link groups (SRLG) or in the IGP Flexible Algorithm. It could also cause tracebacks to the logs or potentially cause the receiving device to crash the IS–IS process, resulting in a DoS condition.
Impact
Base Score 3.x
7.40
Severity 3.x
HIGH
Base Score 2.0
6.10
Severity 2.0
MEDIUM
Vulnerable products and versions
| CPE | From | Up to |
|---|---|---|
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* | 6.5.2 (including) | 6.6.3 (excluding) |
| cpe:2.3:o:cisco:carrier_routing_system:6.5.1:*:*:*:*:*:*:* | ||
| cpe:2.3:o:cisco:carrier_routing_system:6.5.3:*:*:*:*:*:*:* |
To consult the complete list of CPE names with products and versions, see this page