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CVE-2003-1491
Kerio Personal Firewall (KPF) 2.1.4 has a default rule to accept incoming packets from DNS (UDP port 53), which allows remote attackers to…
High7.5EPSS 2.4%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
Kerio Personal Firewall (KPF) 2.1.4 has a default rule to accept incoming packets from DNS (UDP port 53), which allows remote attackers to bypass the firewall filters via packets with a source port of 53.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
- EPSS (exploitation in 30 days)
- 2.4% · top 16% of all CVEs (3 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
Affected products
n/a
- affected n/a
References (4)
- 7436 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- 20030422 UDP bypassing in Kerio Firewall 2.1.4 (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
- kerio-pf-firewall-bypass(11880) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- http://www.securiteam.com/securitynews/5FP0N1P9PI.html (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Record last updated .