Vulnerability Monitor

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CVE-2019-5892

bgpd in FRRouting FRR (aka Free Range Routing) 2.x and 3.x before 3.0.4, 4.x before 4.0.1, 5.x before 5.0.2, and 6.x before 6.0.2 (not affecting Cumulus Linux or VyOS), when ENABLE_BGP_VNC is used for Virtual Network Control, allows remote attackers to cause a denial of service (peering session flap) via attribute 255 in a BGP UPDATE packet. This occurred during Disco in January 2019 because FRR does not implement RFC 7606, and therefore the packets with 255 were considered invalid VNC data and the BGP session was closed.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.5, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction requiring only low-level privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 1 product from frrouting organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2019, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2019-01-10T17:29:00.333

Last Modified

2024-11-21T04:45:43.410

Status

Modified

Source

[email protected]

Severity

CVSSv3.0: 6.5 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:S/C:N/I:N/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: SINGLE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

8.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-436

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	frrouting	frrouting	≤ 2.0.2	Yes
Application	frrouting	frrouting	< 3.0.4	Yes
Application	frrouting	frrouting	< 5.0.2	Yes
Application	frrouting	frrouting	< 6.0.2	Yes
Application	frrouting	frrouting	4.0	Yes

References

https://frrouting.org/community/security/cve-2019-5892.html Vendor Advisory ([email protected])
https://github.com/FRRouting/frr/commit/943d595a018e69b550db08cccba1d0778a86705a Patch, Third Party Advisory ([email protected])
https://github.com/FRRouting/frr/releases/tag/frr-3.0.4 Release Notes, Third Party Advisory ([email protected])
https://github.com/FRRouting/frr/releases/tag/frr-4.0.1 Release Notes, Third Party Advisory ([email protected])
https://github.com/FRRouting/frr/releases/tag/frr-5.0.2 Release Notes, Third Party Advisory ([email protected])
https://github.com/FRRouting/frr/releases/tag/frr-6.0.2 Release Notes, Third Party Advisory ([email protected])
https://lists.frrouting.org/pipermail/frog/2019-January/000404.html Patch, Vendor Advisory ([email protected])
https://frrouting.org/community/security/cve-2019-5892.html Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/FRRouting/frr/commit/943d595a018e69b550db08cccba1d0778a86705a Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/FRRouting/frr/releases/tag/frr-3.0.4 Release Notes, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/FRRouting/frr/releases/tag/frr-4.0.1 Release Notes, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/FRRouting/frr/releases/tag/frr-5.0.2 Release Notes, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/FRRouting/frr/releases/tag/frr-6.0.2 Release Notes, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.frrouting.org/pipermail/frog/2019-January/000404.html Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For frrouting's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.