CVE-2020-17467 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Reference

https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01 http://fnet.sourceforge.net/manual/fnet_history.html https://www.kb.cert.org/vuls/id/815128

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

HIGH

Base Severity

9.1