Medium severity · published Jan 10, 2019
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…
6.5
CVSS
2.7%
EPSS
No
On KEV
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 vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.7% · higher than 86% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FR
Frrouting · Frrouting
2.0 through 2.0.2; 3.0 before 3.0.4; 5.0 before 5.0.2; 6.0 before 6.0.2; 4.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-5892
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-5892
Vendor Advisory
https://frrouting.org/community/security/cve-2019-5892.html
Patch
https://github.com/FRRouting/frr/commit/943d595a018e69b550db08cccba1d0778a86705a
Release Notes
https://github.com/FRRouting/frr/releases/tag/frr-3.0.4
Release Notes
https://github.com/FRRouting/frr/releases/tag/frr-4.0.1
Release Notes
https://github.com/FRRouting/frr/releases/tag/frr-5.0.2
Release Notes
https://github.com/FRRouting/frr/releases/tag/frr-6.0.2
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