CVEvulnerability

CVE-2001-1155

9.8 CRITICAL Published 2001-08-23 Modified 2026-06-16 Official page ↗
Status
Modified
Published
2001-08-23
Last modified
2026-06-16
Assigner
[email protected]
CVSS 3.1 ([email protected])
9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
7.5 HIGH — AV:N/AC:L/Au:N/C:P/I:P/A:P
Weaknesses
CWE-863

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.

Affected configurations

• freebsd freebsd (>= 4.1.1 <= 4.3)

Related

Weakness · CWE (1)

  • CWE-863 Incorrect Authorization weakness

Referenced by CWE · observed example (5)

  • CWE-285 Improper Authorization weakness
  • CWE-350 Reliance on Reverse DNS Resolution for a Security-Critical Action weakness
  • CWE-783 Operator Precedence Logic Error weakness
  • CWE-862 Missing Authorization weakness
  • CWE-863 Incorrect Authorization weakness

References