Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Frrouting | Frrouting | >= 2.0, <= 2.0.2 |
Related Weaknesses (CWE)
References
- https://frrouting.org/community/security/cve-2019-5892.htmlVendor Advisory
- https://github.com/FRRouting/frr/commit/943d595a018e69b550db08cccba1d0778a86705aPatchThird Party Advisory
- https://github.com/FRRouting/frr/releases/tag/frr-3.0.4Release NotesThird Party Advisory
- https://github.com/FRRouting/frr/releases/tag/frr-4.0.1Release NotesThird Party Advisory
- https://github.com/FRRouting/frr/releases/tag/frr-5.0.2Release NotesThird Party Advisory
- https://github.com/FRRouting/frr/releases/tag/frr-6.0.2Release NotesThird Party Advisory
- https://lists.frrouting.org/pipermail/frog/2019-January/000404.htmlPatchVendor Advisory
- https://frrouting.org/community/security/cve-2019-5892.htmlVendor Advisory
- https://github.com/FRRouting/frr/commit/943d595a018e69b550db08cccba1d0778a86705aPatchThird Party Advisory
- https://github.com/FRRouting/frr/releases/tag/frr-3.0.4Release NotesThird Party Advisory
- https://github.com/FRRouting/frr/releases/tag/frr-4.0.1Release NotesThird Party Advisory
- https://github.com/FRRouting/frr/releases/tag/frr-5.0.2Release NotesThird Party Advisory
- https://github.com/FRRouting/frr/releases/tag/frr-6.0.2Release NotesThird Party Advisory
- https://lists.frrouting.org/pipermail/frog/2019-January/000404.htmlPatchVendor Advisory
FAQ
What is CVE-2019-5892?
CVE-2019-5892 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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...
How severe is CVE-2019-5892?
CVE-2019-5892 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-5892?
Check the references section above for vendor advisories and patch information. Affected products include: Frrouting Frrouting.