CVE-2001-1155

9.8 criticalEPSS 2.0%

Critical (9.8) in freebsd freebsd. EPSS 2.0% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

9.8 critical

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

EPSS: 2.0% chance of exploitation in the next 30 days; higher than 81% of CVEs (scores of 2026-10-31)
CWE: CWE-863
Published: 2001-08-23
Modified: 2026-06-16
Record from: the NVD, synced 2026-10-19

Affected

freebsd:freebsd

References

ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-01:56.tcp_wrappers.asc
http://www.osvdb.org/5454
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-01:56.tcp_wrappers.asc
http://www.osvdb.org/5454

Check your stack JSON