// For flags

CVE-2001-0402

IPFilter 3.x - Fragment Rule Bypass

Severity Score

7.5
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

IPFilter 3.4.16 and earlier does not include sufficient session information in its cache, which allows remote attackers to bypass access restrictions by sending fragmented packets to a restricted port after sending unfragmented packets to an unrestricted port.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2001-04-09 First Exploit
  • 2001-05-24 CVE Reserved
  • 2001-06-18 CVE Published
  • 2024-08-08 CVE Updated
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Darren Reed
Search vendor "Darren Reed"
Ipfilter
Search vendor "Darren Reed" for product "Ipfilter"
<= 3.4.16
Search vendor "Darren Reed" for product "Ipfilter" and version " <= 3.4.16"
-
Affected
Freebsd
Search vendor "Freebsd"
Freebsd
Search vendor "Freebsd" for product "Freebsd"
<= 4.1
Search vendor "Freebsd" for product "Freebsd" and version " <= 4.1"
-
Affected
Openbsd
Search vendor "Openbsd"
Openbsd
Search vendor "Openbsd" for product "Openbsd"
2.8
Search vendor "Openbsd" for product "Openbsd" and version "2.8"
-
Affected