CVE-2001-0183

Severity: high (CVSS 7.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 8.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2001-03-26 · updated 2026-06-16

Description

ipfw and ip6fw in FreeBSD 4.2 and earlier allows remote attackers to bypass access restrictions by setting the ECE flag in a TCP packet, which makes the packet appear to be part of an established connection.

Affected products

FreeBSD: 3.0, 3.1, 3.3, 3.4, 3.5, 3.5.1 (+5)

References

http://www.ciac.org/ciac/bulletins/l-029.shtml
http://www.osvdb.org/1743
http://www.security-express.com/archives/bugtraq/2001-01/0424.html
http://www.securityfocus.com/bid/2293
https://exchange.xforce.ibmcloud.com/vulnerabilities/5998
http://www.ciac.org/ciac/bulletins/l-029.shtml
http://www.osvdb.org/1743
http://www.security-express.com/archives/bugtraq/2001-01/0424.html
http://www.securityfocus.com/bid/2293
https://exchange.xforce.ibmcloud.com/vulnerabilities/5998

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