ISC dhcrelay (dhcp-relay) 3.0rc9 and earlier, and possibly other versions, allows remote…
Priority LOW 34Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- Fixed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.
Summary
ISC dhcrelay (dhcp-relay) 3.0rc9 and earlier, and possibly other versions, allows remote attackers to cause a denial of service (packet storm) via a certain BOOTP packet that is forwarded to a broadcast MAC address, causing an infinite loop that is not restricted by a hop count.
Why it matters now
EPSS 0.07955 94th percentileScored 2026-11-07
Fix Fixed 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 · 10
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:isc:dhcpd:3.0.1:rc1:*:*:*:*:*:* | 3.0.1 rc1 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcpd:3.0.1:rc10:*:*:*:*:*:* | 3.0.1 rc10 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcpd:3.0.1:rc2:*:*:*:*:*:* | 3.0.1 rc2 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcpd:3.0.1:rc3:*:*:*:*:*:* | 3.0.1 rc3 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcpd:3.0.1:rc4:*:*:*:*:*:* | 3.0.1 rc4 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcpd:3.0.1:rc5:*:*:*:*:*:* | 3.0.1 rc5 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcpd:3.0.1:rc6:*:*:*:*:*:* | 3.0.1 rc6 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcpd:3.0.1:rc7:*:*:*:*:*:* | 3.0.1 rc7 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcpd:3.0.1:rc8:*:*:*:*:*:* | 3.0.1 rc8 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcpd:3.0.1:rc9:*:*:*:*:*:* | 3.0.1 rc9 | Vulnerable | ISC |
- cpe:2.3:a:isc:dhcpd:3.0.1:rc1:*:*:*:*:*:* Versions 3.0.1 rc1 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcpd:3.0.1:rc10:*:*:*:*:*:* Versions 3.0.1 rc10 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcpd:3.0.1:rc2:*:*:*:*:*:* Versions 3.0.1 rc2 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcpd:3.0.1:rc3:*:*:*:*:*:* Versions 3.0.1 rc3 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcpd:3.0.1:rc4:*:*:*:*:*:* Versions 3.0.1 rc4 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcpd:3.0.1:rc5:*:*:*:*:*:* Versions 3.0.1 rc5 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcpd:3.0.1:rc6:*:*:*:*:*:* Versions 3.0.1 rc6 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcpd:3.0.1:rc7:*:*:*:*:*:* Versions 3.0.1 rc7 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcpd:3.0.1:rc8:*:*:*:*:*:* Versions 3.0.1 rc8 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcpd:3.0.1:rc9:*:*:*:*:*:* Versions 3.0.1 rc9 Vulnerable ·ISC
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2003-0039
- 2026-10-03 Alias added: GHSA-h2v9-xvmg-qcc7
References
More ISC Dhcpd vulnerabilities
- TI-2004-00415 Buffer overflow in the logging capability for the DHCP daemon (DHCPD) for ISC DHCP… CVSS 2.0HIGH 10.0
- TI-2002-00679 Format string vulnerabilities in the logging routines for dynamic DNS code (print.c) of… CVSS 2.0HIGH 10.0
- TI-2004-00416 The DHCP daemon (DHCPD) for ISC DHCP 3.0.1rc12 and 3.0.1rc13, when compiled in… CVSS 2.0HIGH 10.0
- TI-2004-00912 Format string vulnerability in the log functions in dhcpd for dhcp 2.x allows remote DNS… CVSS 2.0HIGH 10.0
- TI-2003-00023 Multiple stack-based buffer overflows in the error handling routines of the minires… CVSS 2.0HIGH 7.5
- TI-2019-04534 dhcpd: use-after-free error leads crash in IPv6 mode when using mismatched BIND libraries CVSS 3.1HIGH 7.5
Sources
- CVE-2003-0039 · CVE Program
- CVE-2003-0039 · NVD
- FIRST EPSS
- GHSA-h2v9-xvmg-qcc7 · GitHub Advisory Database · CC BY 4.0
- CVE-2003-0039 · Red Hat security data · CC BY 4.0
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