Description
An issue was discovered in FNET through 4.6.4. The code for processing the hop-by-hop header (in the IPv6 extension headers) doesn't check for a valid length of an extension header, and therefore an out-of-bounds read can occur in _fnet_ip6_ext_header_handler_options in fnet_ip6.c, leading to Denial-of-Service.
References (3)
Core 3
Core References
Third Party Advisory, US Government Resource x_refsource_misc
https://www.kb.cert.org/vuls/id/815128
Third Party Advisory, US Government Resource x_refsource_misc
https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01
Release Notes, Third Party Advisory x_refsource_confirm
http://fnet.sourceforge.net/manual/fnet_history.html
Scores
CVSS v3
7.5
EPSS
0.0069
EPSS Percentile
72.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-125
Status
published
Products (1)
butok/fnet
< 4.6.4
Published
Dec 11, 2020
Tracked Since
Feb 18, 2026