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CVE-2023-38802

Published: 28 August 2023

FRRouting FRR 7.5.1 through 9.0 and Pica8 PICOS 4.3.3.2 allow a remote attacker to cause a denial of service via a crafted BGP update with a corrupted attribute 23 (Tunnel Encapsulation).

Notes

AuthorNote
sbeattie
VINCE #1159
eslerm
frr merged patch on 2023-08-29 bcb6b58d9 ("bgpd:
Use treat-as-withdraw for tunnel encapsulation attribute")
quagga does not implement RFC 7606
mdeslaur
This was actually fixed in USN-6323-1, but was not listed
because of a copy/paste error

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
frr
Launchpad, Ubuntu, Debian
bionic Does not exist

focal
Released (7.2.1-1ubuntu0.2+esm2)
Available with Ubuntu Pro
jammy
Released (8.1-1ubuntu1.5)
lunar
Released (8.4.2-1ubuntu1.3)
mantic Not vulnerable
(8.4.4-1.1ubuntu1)
noble Not vulnerable
(8.4.4-1.1ubuntu1)
trusty Does not exist

upstream
Released (8.4.4-1.1)
xenial Does not exist

Patches:
upstream: https://github.com/FRRouting/frr/commit/bcb6b58d9530173df41d3a3cbc4c600ee0b4b186
quagga
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(code not present)
focal Not vulnerable
(code not present)
jammy Does not exist

lunar Does not exist

mantic Does not exist

noble Does not exist

trusty Ignored
(end of standard support)
upstream Not vulnerable
(code not present)
xenial Not vulnerable
(code not present)

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H