CVE-2001-1155 Auth bypass in n/a

Critical 9.8 Published 25 Jun 2002 Updated 8 Aug 2024

Remote attackers can bypass TCP Wrappers access restrictions via DNS spoofing when the PARANOID ACL option is enabled in FreeBSD.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2001-1155?

CVE-2001-1155 is a critical authentication bypass vulnerability in Freebsd Freebsd, published on 25 Jun 2002. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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: CWE-863

Which versions are affected by CVE-2001-1155?

It affects 1 product.

Products include Freebsd Freebsd.

How do I fix CVE-2001-1155?

No fix has been published for CVE-2001-1155 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2001-1155 being exploited?

There is no known exploitation of CVE-2001-1155 in the wild and no public exploit code.

All Freebsd Freebsd vulnerabilities

Sources

Also known as GHSA-g76r-67w3-6583.