CVE-2019-16020 describes multiple denial-of-service (DoS) vulnerabilities in Cisco IOS XR Software, specifically within its Border Gateway Protocol (BGP) Ethernet VPN (EVPN) functionality. These vulnerabilities, rated with a CVSS score of 8.6 (HIGH), allow an unauthenticated, remote attacker to cause the BGP process to restart by sending crafted BGP EVPN update messages with malformed attributes. While the attack requires the malicious message to originate from a configured BGP peer or be injected into an existing BGP session, it has a high impact on availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
6.6.1CPE matchmatch criteria | cpe:2.3:o:cisco:ios_xr:6.6.1:*:*:*:*:*:*:* | ||
6.6.2CPE matchmatch criteria | cpe:2.3:o:cisco:ios_xr:6.6.2:*:*:*:*:*:*:* | ||
6.6.25CPE matchmatch criteria | cpe:2.3:o:cisco:ios_xr:6.6.25:*:*:*:*:*:*:* | ||
7.0.1CPE matchmatch criteria | cpe:2.3:o:cisco:ios_xr:7.0.1:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
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