Out-of-bounds Read in Butok Fnet
CVE-2020-17468
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.030 (86.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 86.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.030 · newest: 0.030 · change: +0.000
Affected products
Weakness classification (CWE)
References
- www.kb.cert.org/vuls/id/815128 (US Government Resource, Third Party Advisory)
- us-cert.cisa.gov/ics/advisories/icsa-20-343-01 (US Government Resource, Third Party Advisory)
- fnet.sourceforge.net/manual/fnet_history.html (Third Party Advisory, Release Notes)
Frequently asked questions
- What is CVE-2020-17468?
- CVE-2020-17468 is a high-severity vulnerability in Butok Fnet, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2020-12-11.
- How severe is CVE-2020-17468?
- High severity. CVSS v3 base score is 7.5 out of 10.