Published: 10/01/2019 Updated: 24/08/2020

CVSS v2 Base Score: 4 | Impact Score: 2.9 | Exploitability Score: 8

CVSS v3 Base Score: 6.5 | Impact Score: 3.6 | Exploitability Score: 2.8

VMScore: 356

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

bgpd in FRRouting FRR (aka Free Range Routing) 2.x and 3.x prior to 3.0.4, 4.x prior to 4.0.1, 5.x prior to 5.0.2, and 6.x prior to 6.0.2 (not affecting Cumulus Linux or VyOS), when ENABLE_BGP_VNC is used for Virtual Network Control, allows remote malicious users 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.

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frrouting frrouting
frrouting frrouting 4.0

CWE-436 https://lists.frrouting.org/pipermail/frog/2019-January/000404.html https://github.com/FRRouting/frr/releases/tag/frr-6.0.2 https://github.com/FRRouting/frr/releases/tag/frr-5.0.2 https://github.com/FRRouting/frr/releases/tag/frr-4.0.1 https://github.com/FRRouting/frr/releases/tag/frr-3.0.4 https://github.com/FRRouting/frr/commit/943d595a018e69b550db08cccba1d0778a86705a https://frrouting.org/community/security/cve-2019-5892.html https://nvd.nist.gov

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CVE-2019-5892

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