VULNERABILITY INTELLIGENCE

CVE-2001-1155

CVSS score9.8 CRITICAL
EPSS probability2.03%
CISA KEVNot currently listed
Published2001-08-23
Last modified2026-06-16
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

TCP Wrappers (tcp_wrappers) in FreeBSD 4.1.1 through 4.3 with the PARANOID ACL option enabled does not properly check the result of a reverse DNS lookup, which could allow remote attackers to bypass intended access restrictions via DNS spoofing.

Weakness classification

  • CWE-863: Incorrect Authorization

Primary references