CVE-2001-1155 describes a critical vulnerability in TCP Wrappers (tcp_wrappers) within FreeBSD versions 4.1.1 through 4.3. When the PARANOID ACL option is enabled, the software fails to correctly validate reverse DNS lookup results, allowing remote attackers to bypass access controls through DNS spoofing. This vulnerability carries a CVSS score of 9.8 (Critical) due to its network-based attack vector, low attack complexity, and high potential for compromise of confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion with 10 mentions, indicating awareness despite its age.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 4.1.1, <= 4.3CPE matchmatch criteria | cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.