CVE-2001-1155
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.03%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.03% probability · 80th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-863
- Affected
- freebsd/freebsd
- Source
- cve@mitre.org
References
- ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-01:56.tcp_wrappers.ascBroken Link, Patch, Vendor Advisory
- http://www.osvdb.org/5454Broken Link
- ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-01:56.tcp_wrappers.ascBroken Link, Patch, Vendor Advisory
- http://www.osvdb.org/5454Broken Link
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.