How severe is CVE-2002-1978?

CVE-2002-1978 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2002-1978 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2002-1978?

CVE-2002-1978 primarily affects Darren Reed Ipfilter. In total, 82 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2002-1978?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2002-1978 published?

CVE-2002-1978 was published on 2002-12-31 and last updated on 2026-06-16.

CVE-2002-1978

CVE-2002-1978 is a high-severity vulnerability in Darren Reed Ipfilter with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-264.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Darren Reed Ipfilter
Published: 2002-12-31
Last modified: 2026-06-16

Description

IPFilter 3.1.1 through 3.4.28 allows remote attackers to bypass firewall rules by sending a PASV command string as the argument of another command to an FTP server, which generates a response that contains the string, causing IPFilter to treat the response as if it were a legitimate PASV command from the server.

Frequently asked questions

What is CVE-2002-1978?: IPFilter 3.1.1 through 3.4.28 allows remote attackers to bypass firewall rules by sending a PASV command string as the argument of another command to an FTP server, which generates a response that contains the string, causing IPFilter to treat the response as if it were a legitimate PASV command from the server.
How severe is CVE-2002-1978?: CVE-2002-1978 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2002-1978 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2002-1978?: CVE-2002-1978 primarily affects Darren Reed Ipfilter. In total, 82 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2002-1978?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2002-1978 published?: CVE-2002-1978 was published on 2002-12-31 and last updated on 2026-06-16.

References

Affected products (82)

cpe:2.3:a:darren_reed:ipfilter:3.1.1:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.1.2:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.1.3:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.1.4:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.1.5:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.1.6:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.1.7:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.1.8:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.1.9:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.1.10:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.2.1:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.2.2:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.2.3:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.2.4:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.2.5:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.2.6:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.2.7:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.2.8:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.2.9:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.2.10:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.2.11:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.2.12:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.2.13:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.2.14:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.2.15:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.2.16:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.2.17:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.2.18:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.2.19:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.2.20:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.2.21:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.2.22:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.3.1:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.3.2:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.3.3:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.3.4:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.3.5:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.3.6:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.3.7:*:*:*:*:*:*:*
cpe:2.3:a:darren_reed:ipfilter:3.3.8:*:*:*:*:*:*:*

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