CVE-2001-0183
ipfw and ip6fw in FreeBSD 4.2 and earlier allows remote attackers to bypass access restrictions...
CVE-2001-0183 is a high vulnerability (CVSS 7.5) in Freebsd, published March 26, 2001. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 8.09%, the 94th percentile. No source names a fixed version.
- Severity
- 7.5 HighCVSS 2.0, NVD
- Exploit chance
- 8.09%EPSS, 94th percentile
- Exploitation
- None known1 public exploit
- Fixed in
- No fix listedNo source names one
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.
Exploit likelihood
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | FreeBSD 3.x/4.x - 'ipfw' Filtering Evasion | 2001-01-23 |
What each source reports
NVD Score used
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.
- Record
CVE-2001-0183- CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Updated
- 2026-11-02
CVE ListNo score
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.
- Record
CVE-2001-0183- Updated
- 2026-11-02
EUVDEUVD-2001-0183No score
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.
- Record
EUVD-2001-0183- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-6wc5-6x3h-cm5pNo score
ipfw and ip6fw in FreeBSD 4.2 and earlier allows remote attackers to bypass access restrictions...
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.
- Record
GHSA-6wc5-6x3h-cm5p- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.