CVE-2001-0402: n/a vulnerability

CVE-2001-0402: IPFilter 3.4.16 and earlier does not include sufficient session information in its cache, which allows remo...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 8, 2024, 04:21 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2001-0402 is a legacy IPFilter firewall flaw. A remote attacker could abuse packet fragmentation behavior to reach a port that firewall rules were meant to restrict, after traffic to an allowed port influenced the session cache. The main business risk is unauthorized network access where old IPFilter deployments still protect sensitive services. Exposure is limited to systems still running IPFilter 3.4.16 or earlier, including legacy FreeBSD or other platforms using that IPFilter release. The source bundle does not identify CPEs or a complete affected-product list. Prioritize if any internet-facing or segmentation-critical host still uses affected IPFilter. For modern environments with no IPFilter 3.4.16 or earlier, this is mainly a legacy hygiene and asset-discovery issue. Mitigation focus: Inventory systems that use IPFilter and identify versions 3.4.16 or earlier.; Follow FreeBSD-SA-01:32 and current vendor guidance for supported remediation.; Replace unsupported legacy firewall components where vendor fixes are unavailable..

Prepared: Jul 1, 2026, 08:44 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Sep 18, 2001, 04:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
ipfilter-access-ports(6331)CVE reference · vdb-entry, x_refsource_XF

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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