Out-of-bounds Read in Butok Fnet
CVE-2020-17467
An issue was discovered in FNET through 4.6.4. The code for processing the hostname from an LLMNR request doesn't check for '\0' termination. Therefore, the deduced length of the hostname doesn't reflect the correct length of the actual data. This may lead to Information Disclosure in _fnet_llmnr_poll in fnet_llmnr.c during a response to a malicious request of the DNS class IN.
Vulnerability class: Buffer Overflow
EPSS: 0.030 (86.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
Affected products
- Butok Fnet
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (US Government Resource, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (US Government Resource, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (x_refsource_CONFIRM, Third Party Advisory, Release Notes)
Frequently asked questions
- What is CVE-2020-17467?
- CVE-2020-17467 is a critical-severity vulnerability in Butok Fnet, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2020-12-11.
- How severe is CVE-2020-17467?
- Critical severity. CVSS v3 base score is 9.1 out of 10.