CVE-2019-5892

Name: CVE-2019-5892
Creator: NVD / NIST
Published: 2019-01-10T17:29:00.333+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.72%

Last modified Jun 17, 2026

CVE-2019-5892 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 2.72% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

2.72%

84.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-436

Affected Software

Vendor	Product	Versions
Frrouting	Frrouting	>= 2.0, <= 2.0.2
Frrouting	Frrouting	>= 3.0, < 3.0.4
Frrouting	Frrouting	>= 5.0, < 5.0.2
Frrouting	Frrouting	>= 6.0, < 6.0.2
Frrouting	Frrouting	4.0

References

https://frrouting.org/community/security/cve-2019-5892.htmlVendor Advisory
https://github.com/FRRouting/frr/commit/943d595a018e69b550db08cccba1d0778a86705aPatch, Third Party Advisory
https://github.com/FRRouting/frr/releases/tag/frr-3.0.4Release Notes, Third Party Advisory
https://github.com/FRRouting/frr/releases/tag/frr-4.0.1Release Notes, Third Party Advisory
https://github.com/FRRouting/frr/releases/tag/frr-5.0.2Release Notes, Third Party Advisory
https://github.com/FRRouting/frr/releases/tag/frr-6.0.2Release Notes, Third Party Advisory
https://lists.frrouting.org/pipermail/frog/2019-January/000404.htmlPatch, Vendor Advisory
https://frrouting.org/community/security/cve-2019-5892.htmlVendor Advisory
https://github.com/FRRouting/frr/commit/943d595a018e69b550db08cccba1d0778a86705aPatch, Third Party Advisory
https://github.com/FRRouting/frr/releases/tag/frr-3.0.4Release Notes, Third Party Advisory
https://github.com/FRRouting/frr/releases/tag/frr-4.0.1Release Notes, Third Party Advisory
https://github.com/FRRouting/frr/releases/tag/frr-5.0.2Release Notes, Third Party Advisory
https://github.com/FRRouting/frr/releases/tag/frr-6.0.2Release Notes, Third Party Advisory
https://lists.frrouting.org/pipermail/frog/2019-January/000404.htmlPatch, Vendor Advisory

Timeline

Published: Jan 10, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-5892?

How severe is CVE-2019-5892?

Severity scoring for CVE-2019-5892 is pending analysis. The EPSS model estimates a 2.72% probability of exploitation in the next 30 days.

How do I fix CVE-2019-5892?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-5892?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST