CVE-2019-1849
Published May 16, 2019
Last updated 5 years ago
Overview
- 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.
- Source
- ykramarz@cisco.com
- NVD status
- Modified
Social media
- Hype score
- Not currently trending
Risk scores
CVSS 3.0
- Type
- Primary
- Base score
- 6.5
- Impact score
- 3.6
- Exploitability score
- 2.8
- Vector string
- CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Severity
- MEDIUM
CVSS 2.0
- Type
- Primary
- Base score
- 6.1
- Impact score
- 6.9
- Exploitability score
- 6.5
- Vector string
- AV:A/AC:L/Au:N/C:N/I:N/A:C
Configurations
[
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "4DD653DF-A420-494B-A987-62FE08C60651",
"versionEndExcluding": "6.3.3",
"versionStartIncluding": "6.1.0"
},
{
"criteria": "cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8A68DB35-1A83-4087-9B67-24BBE8A33277",
"versionEndExcluding": "6.4.2",
"versionStartIncluding": "6.4.0"
},
{
"criteria": "cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0D8805AA-0360-47BD-8E8E-954DC9A26184",
"versionEndExcluding": "6.5.2",
"versionStartIncluding": "6.5.0"
},
{
"criteria": "cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "94B1C38E-CD39-43DE-855F-A2B5891A3D13",
"versionEndExcluding": "6.6.1",
"versionStartIncluding": "6.6.0"
}
],
"operator": "OR"
}
]
}
]