Home/CVE/ipfw and ip6fw in FreeBSD 4.2 and earlier allows remote attackers to bypass access restrictions by setting the ECE flag
CVE

CVE-2001-0183

ipfw and ip6fw in FreeBSD 4.2 and earlier allows remote attackers to bypass access restrictions by setting the ECE flag

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.

HIGH · CVSS 7.5 EPSS 0.08911
Act now
  • EPSS percentile: top 7% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
▤

Affected Products & Versions

1
freebsdall versions
⚠

Public Exploits & PoCs

2
remoteFreeBSD 3.x/4.x - 'ipfw' Filtering Evasionverified
pocwww.securityfocus.com · 2293www.securityfocus.com
▣

Scoring & Timeline

7.5
HIGH · CVSS v2 (legacy) · cve@mitre.org
View on NVD
This CVE predates CVSS v3; the legacy v2 score is shown so triage still has a severity to work with.
v2 Vector
AV:N/AC:L/Au:N/C:P/I:P/A:P
Published to NVD26 Mar 2001 · 05:00 AM
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-01:08.ipfw.ascPatchVendor Advisory
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
https://exchange.xforce.ibmcloud.com/vulnerabilities/5998
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