CVE-2003-0187: n/a vulnerability

CVE-2003-0187: The connection tracking core of Netfilter for Linux 2.4.20, with CONFIG_IP_NF_CONNTRACK enabled or the ip_c...

The connection tracking core of Netfilter for Linux 2.4.20, with CONFIG_IP_NF_CONNTRACK enabled or the ip_conntrack module loaded, allows remote attackers to cause a denial of service (resource consumption) due to an inconsistency with Linux 2.4.20's support of linked lists, which causes Netfilter to fail to identify connections with an UNCONFIRMED status and use large timeouts.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 8, 2024, 01:43 UTC (UTC+00:00)

Security readout for executives and security teams

This is a legacy Linux firewall/kernel denial-of-service issue. A remote attacker could exhaust resources on Linux 2.4.20 systems when Netfilter connection tracking is enabled or the ip_conntrack module is loaded. It matters mainly for old, unsupported systems still handling network traffic. Exposure is likely limited to legacy Linux 2.4.20 hosts using Netfilter conntrack, especially firewall, NAT, or gateway systems. The bundle does not identify modern distributions, package names, or broader affected versions. Low for modern environments; higher if legacy Linux 2.4.20 systems still protect or route production traffic. The business risk is service disruption on old infrastructure rather than data theft based on provided evidence. Mitigation focus: Identify any Linux 2.4.20 systems with Netfilter connection tracking enabled.; Check vendor or distribution guidance for fixed historical kernel packages.; Retire or isolate unsupported Linux 2.4.20 network-facing systems..

Prepared: Jun 30, 2026, 09:00 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: Aug 5, 2003, 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

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Source materials

CVE List V5 sourceCVE List V5
oval:org.mitre.oval:def:260CVE reference · vdb-entry, signature

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

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