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CVE-2019-5892

Disclosed 2019-01-10

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.

Severity

High

Affected FRR Versions

  • 2.x
  • 3.0 ~ 3.0.3
  • 4.0
  • 5.0 ~ 5.0.1
  • 6.0 ~ 6.0.1

Versions prior to 6.0 are end-of-life and no longer receive security updates.

References

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

Git Fixes

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