Race condition in IPFilter firewall 3.4.3 and earlier, when configured with overlapping…
Priority LOW 16Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- None · Partial · None
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
Race condition in IPFilter firewall 3.4.3 and earlier, when configured with overlapping "return-rst" and "keep state" rules, allows remote attackers to bypass access restrictions.
Why it matters now
EPSS 0.01411 72nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:darren_reed:ipfilter:3.3.15:*:*:*:*:*:*:* | 3.3.15 | Vulnerable | Darren Reed |
| cpe:2.3:a:darren_reed:ipfilter:3.4.3:*:*:*:*:*:*:* | 3.4.3 | Vulnerable | Darren Reed |
- cpe:2.3:a:darren_reed:ipfilter:3.3.15:*:*:*:*:*:*:* Versions 3.3.15 Vulnerable ·Darren Reed
- cpe:2.3:a:darren_reed:ipfilter:3.4.3:*:*:*:*:*:*:* Versions 3.4.3 Vulnerable ·Darren Reed
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2000-0553
- 2026-10-03 Alias added: GHSA-wmhx-3hr4-6h39
References
Other 1
More Darren Reed Ipfilter vulnerabilities
- TI-2001-00395 IPFilter 3.4.16 and earlier does not include sufficient session information in its cache… CVSS 2.0HIGH 7.5
- TI-2002-01897 IPFilter 3.1.1 through 3.4.28 allows remote attackers to bypass firewall rules by sending… CVSS 2.0HIGH 7.5
- TI-2009-01397 Buffer overflow in lib/load_http.c in ippool in Darren Reed IPFilter (aka IP Filter)… CVSS 2.0HIGH 7.2
- TI-1999-01192 IPFilter 3.2.3 through 3.2.10 allows local users to modify arbitrary files via a symlink… CVSS 2.0HIGH 7.2
Sources
- CVE-2000-0553 · CVE Program
- CVE-2000-0553 · NVD
- FIRST EPSS
- GHSA-wmhx-3hr4-6h39 · GitHub Advisory Database · CC BY 4.0
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