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CVE-2002-1978

24
FAUCET Score

CVE-2002-1978 describes a firewall bypass vulnerability in IPFilter versions 3.1.1 through 3.4.28. Remote attackers can exploit this by sending a crafted FTP command containing a "PASV" string, tricking IPFilter into misinterpreting the FTP server's response as a legitimate PASV command and thus bypassing established firewall rules. This vulnerability carries a high CVSS score of 7.5, indicating a network-based attack with low complexity that could lead to partial compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation, public exploit code, or inclusion in the KEV catalog, the vulnerability has garnered significant community discussion, suggesting awareness among security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
3.1.1CPE matchmatch criteria
cpe:2.3:a:darren_reed:ipfilter:3.1.1:*:*:*:*:*:*:*
3.1.2CPE matchmatch criteria
cpe:2.3:a:darren_reed:ipfilter:3.1.2:*:*:*:*:*:*:*
3.1.3CPE matchmatch criteria
cpe:2.3:a:darren_reed:ipfilter:3.1.3:*:*:*:*:*:*:*
3.1.4CPE matchmatch criteria
cpe:2.3:a:darren_reed:ipfilter:3.1.4:*:*:*:*:*:*:*
3.1.5CPE matchmatch criteria
cpe:2.3:a:darren_reed:ipfilter:3.1.5:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

AV:N/AC:L/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.01%
Probability of exploitation in next 30 days
EPSS Percentile
78.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0201 is in the 63rd percentile among its peer group of 51,455 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

ftp.netbsd.org / pub/NetBSD/security/advisories/NetBSD-SA2002-024.txt.asc
securitytracker.com / id
Patch
iss.net / security_center/static/10409.php
Patch
kb.cert.org / vuls/id/328867
US Government Resource
securityfocus.com / bid/6010
Patch