CVE-2001-0183
UnknownEPSS 8.09%
Last modified
CVE-2001-0183 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 8.09% chance of exploitation in the next 30 days.
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.
Metrics
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Freebsd | Freebsd | 3.0 |
| Freebsd | Freebsd | 3.1 |
| Freebsd | Freebsd | 3.3 |
| Freebsd | Freebsd | 3.4 |
| Freebsd | Freebsd | 3.5 |
| Freebsd | Freebsd | 3.5.1 |
| Freebsd | Freebsd | 4.0 |
| Freebsd | Freebsd | 4.1 |
| Freebsd | Freebsd | 4.1.1 |
| Freebsd | Freebsd | 4.2 |
References
- ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-01:08.ipfw.ascPatch, Vendor Advisory
- http://www.securityfocus.com/bid/2293Exploit, Patch, Vendor Advisory
- ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-01:08.ipfw.ascPatch, Vendor Advisory
- http://www.securityfocus.com/bid/2293Exploit, Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2001-0183?
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.
How severe is CVE-2001-0183?
Severity scoring for CVE-2001-0183 is pending analysis. The EPSS model estimates a 8.09% probability of exploitation in the next 30 days.
How do I fix CVE-2001-0183?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2001-0183?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST