dhcpd in ISC DHCP 3.0.4 and 3.1.1, when the dhcp-client-identifier and hardware ethernet…
Priority LOW 34CWE-16Published · 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
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
dhcpd in ISC DHCP 3.0.4 and 3.1.1, when the dhcp-client-identifier and hardware ethernet configuration settings are both used, allows remote attackers to cause a denial of service (daemon crash) via unspecified requests.
Why it matters now
EPSS 0.08566 95th percentileScored 2026-11-07
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 · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:isc:dhcp:3.0.4:*:*:*:*:*:*:* | 3.0.4 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcp:3.0.4_b1:*:*:*:*:*:*:* | 3.0.4_b1 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcp:3.0.4_b2:*:*:*:*:*:*:* | 3.0.4_b2 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcp:3.0.4_b3:*:*:*:*:*:*:* | 3.0.4_b3 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcp:3.1.1:*:*:*:*:*:*:* | 3.1.1 | Vulnerable | ISC |
- cpe:2.3:a:isc:dhcp:3.0.4:*:*:*:*:*:*:* Versions 3.0.4 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcp:3.0.4_b1:*:*:*:*:*:*:* Versions 3.0.4_b1 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcp:3.0.4_b2:*:*:*:*:*:*:* Versions 3.0.4_b2 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcp:3.0.4_b3:*:*:*:*:*:*:* Versions 3.0.4_b3 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcp:3.1.1:*:*:*:*:*:*:* Versions 3.1.1 Vulnerable ·ISC
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2009-1892
- 2026-10-03 Alias added: GHSA-q526-8q52-r7jc
- 2026-10-16 EPSS moved to the 95th–99th percentile
References
Patch 1
More ISC Dhcp vulnerabilities
- TI-2011-00858 dhclient in ISC DHCP 3.0.x through 4.2.x before 4.2.1-P1, 3.1-ESV before 3.1-ESV-R1, and… CVSS 2.0HIGH 7.5
- TI-2017-02364 Failure to properly clean up closed OMAPI connections can exhaust available sockets CVSS 3.1HIGH 7.5
- TI-2015-07072 ISC DHCP 4.x before 4.1-ESV-R12-P1, 4.2.x, and 4.3.x before 4.3.3-P1 allows remote… CVSS 3.0MEDIUM 6.5
- TI-2016-02318 ISC DHCP 4.1.x before 4.1-ESV-R13 and 4.2.x and 4.3.x before 4.3.4 does not restrict the… CVSS 3.1MEDIUM 5.9
- TI-2009-00661 Stack-based buffer overflow in the script_write_params method in client/dhclient.c in ISC… CVSS 2.0HIGH 10.0
- TI-2010-02068 ISC DHCP 4.1 before 4.1.1-P1 and 4.0 before 4.0.2-P1 allows remote attackers to cause a… CVSS 2.0MEDIUM 5.0
Sources
- CVE-2009-1892 · CVE Program
- CVE-2009-1892 · NVD
- FIRST EPSS
- GHSA-q526-8q52-r7jc · GitHub Advisory Database · CC BY 4.0
- CVE-2009-1892 · Red Hat security data · CC BY 4.0
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