CVE-2019-5892
What it is
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.
At a glance
- Exploitability
- Can be exploited over the network with a low-privilege account. High risk of service disruption.
- Exploit odds
- 2.7% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 2.7% in the next 30 days (EPSS).
- Severity: 6.5 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 2.7% · EPSS, next 30 days
- Weakness
- CWE-436
- Record status
- Modified
Affected
- Frrouting ≤ 2.0.2
- Frrouting < 3.0.4
- Frrouting < 5.0.2
- Frrouting < 6.0.2
- Frrouting 4.0
Attack profile CVSS 3.0 · 6.5
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Raw vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2019-5892.md and follow it. Check whether this project is affected by CVE-2019-5892. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://frrouting.org/community/security/cve-2019-5892.html
- https://github.com/FRRouting/frr/commit/943d595a018e69b550db08cccba1d0778a86705a
- https://github.com/FRRouting/frr/releases/tag/frr-3.0.4
- https://github.com/FRRouting/frr/releases/tag/frr-4.0.1
- https://github.com/FRRouting/frr/releases/tag/frr-5.0.2
- https://github.com/FRRouting/frr/releases/tag/frr-6.0.2
- https://lists.frrouting.org/pipermail/frog/2019-January/000404.html
- https://frrouting.org/community/security/cve-2019-5892.html
- https://github.com/FRRouting/frr/commit/943d595a018e69b550db08cccba1d0778a86705a
- https://github.com/FRRouting/frr/releases/tag/frr-3.0.4
References
- https://frrouting.org/community/security/cve-2019-5892.html
- https://github.com/FRRouting/frr/commit/943d595a018e69b550db08cccba1d0778a86705a
- https://github.com/FRRouting/frr/releases/tag/frr-3.0.4
- https://github.com/FRRouting/frr/releases/tag/frr-4.0.1
- https://github.com/FRRouting/frr/releases/tag/frr-5.0.2
- https://github.com/FRRouting/frr/releases/tag/frr-6.0.2
- https://lists.frrouting.org/pipermail/frog/2019-January/000404.html
- https://frrouting.org/community/security/cve-2019-5892.html
- https://github.com/FRRouting/frr/commit/943d595a018e69b550db08cccba1d0778a86705a
- https://github.com/FRRouting/frr/releases/tag/frr-3.0.4
- https://github.com/FRRouting/frr/releases/tag/frr-4.0.1
- https://github.com/FRRouting/frr/releases/tag/frr-5.0.2
- https://github.com/FRRouting/frr/releases/tag/frr-6.0.2
- https://lists.frrouting.org/pipermail/frog/2019-January/000404.html