CVEvulnerability

CVE-2019-1849

6.5 MEDIUM Published 2019-05-16 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2019-05-16
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.0 ([email protected])
7.4 HIGH — CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CVSS 3.0 ([email protected])
6.5 MEDIUM — CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0 ([email protected])
6.1 MEDIUM — AV:A/AC:L/Au:N/C:N/I:N/A:C
Weaknesses
CWE-754

Description

A vulnerability in the Border Gateway Patrol (BGP) Multiprotocol Label Switching (MPLS)-based Ethernet VPN (EVPN) implementation of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to trigger a denial of service (DoS) condition on an affected device. The vulnerability is due to a logic error that occurs when the affected software processes specific EVPN routing information. An attacker could exploit this vulnerability by injecting malicious traffic patterns into the targeted EVPN network. A successful exploit could result in a crash of the l2vpn_mgr process on Provider Edge (PE) device members of the same EVPN instance (EVI). On each of the affected devices, a crash could lead to system instability and the inability to process or forward traffic through the device, resulting in a DoS condition that would require manual intervention to restore normal operating conditions.

Affected configurations

• cisco ios xr (>= 6.1.0 < 6.3.3) • cisco ios xr (>= 6.4.0 < 6.4.2) • cisco ios xr (>= 6.5.0 < 6.5.2) • cisco ios xr (>= 6.6.0 < 6.6.1)

Related

Weakness · CWE (1)

  • CWE-754 Improper Check for Unusual or Exceptional Conditions weakness

References