libdns in ISC DHCP 4.2.x before 4.2.5-P1 allows remote name servers to cause a denial of…
Priority LOW 25CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- High
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Complete
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.
Summary
libdns in ISC DHCP 4.2.x before 4.2.5-P1 allows remote name servers to cause a denial of service (memory consumption) via vectors involving a regular expression, as demonstrated by a memory-exhaustion attack against a machine running a dhcpd process, a related issue to CVE-2013-2266.
Why it matters now
EPSS 0.01166 67th 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 · 19
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:isc:dhcp:4.2.0:*:*:*:*:*:*:* | 4.2.0 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcp:4.2.0:a1:*:*:*:*:*:* | 4.2.0 a1 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcp:4.2.0:a2:*:*:*:*:*:* | 4.2.0 a2 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcp:4.2.0:b1:*:*:*:*:*:* | 4.2.0 b1 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcp:4.2.0:b2:*:*:*:*:*:* | 4.2.0 b2 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcp:4.2.0:p1:*:*:*:*:*:* | 4.2.0 p1 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcp:4.2.0:rc1:*:*:*:*:*:* | 4.2.0 rc1 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcp:4.2.1:*:*:*:*:*:*:* | 4.2.1 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcp:4.2.1:b1:*:*:*:*:*:* | 4.2.1 b1 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcp:4.2.1:rc1:*:*:*:*:*:* | 4.2.1 rc1 | Vulnerable | ISC |
- cpe:2.3:a:isc:dhcp:4.2.0:*:*:*:*:*:*:* Versions 4.2.0 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcp:4.2.0:a1:*:*:*:*:*:* Versions 4.2.0 a1 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcp:4.2.0:a2:*:*:*:*:*:* Versions 4.2.0 a2 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcp:4.2.0:b1:*:*:*:*:*:* Versions 4.2.0 b1 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcp:4.2.0:b2:*:*:*:*:*:* Versions 4.2.0 b2 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcp:4.2.0:p1:*:*:*:*:*:* Versions 4.2.0 p1 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcp:4.2.0:rc1:*:*:*:*:*:* Versions 4.2.0 rc1 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcp:4.2.1:*:*:*:*:*:*:* Versions 4.2.1 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcp:4.2.1:b1:*:*:*:*:*:* Versions 4.2.1 b1 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcp:4.2.1:rc1:*:*:*:*:*:* Versions 4.2.1 rc1 Vulnerable ·ISC
Show 9 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:isc:dhcp:4.2.2:*:*:*:*:*:*:* | 4.2.2 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcp:4.2.2:b1:*:*:*:*:*:* | 4.2.2 b1 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcp:4.2.2:rc1:*:*:*:*:*:* | 4.2.2 rc1 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcp:4.2.3:*:*:*:*:*:*:* | 4.2.3 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcp:4.2.3:p1:*:*:*:*:*:* | 4.2.3 p1 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcp:4.2.3:p2:*:*:*:*:*:* | 4.2.3 p2 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcp:4.2.4:*:*:*:*:*:*:* | 4.2.4 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcp:4.2.4:p1:*:*:*:*:*:* | 4.2.4 p1 | Vulnerable | ISC |
| cpe:2.3:a:isc:dhcp:4.2.5:*:*:*:*:*:*:* | 4.2.5 | Vulnerable | ISC |
- cpe:2.3:a:isc:dhcp:4.2.2:*:*:*:*:*:*:* Versions 4.2.2 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcp:4.2.2:b1:*:*:*:*:*:* Versions 4.2.2 b1 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcp:4.2.2:rc1:*:*:*:*:*:* Versions 4.2.2 rc1 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcp:4.2.3:*:*:*:*:*:*:* Versions 4.2.3 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcp:4.2.3:p1:*:*:*:*:*:* Versions 4.2.3 p1 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcp:4.2.3:p2:*:*:*:*:*:* Versions 4.2.3 p2 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcp:4.2.4:*:*:*:*:*:*:* Versions 4.2.4 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcp:4.2.4:p1:*:*:*:*:*:* Versions 4.2.4 p1 Vulnerable ·ISC
- cpe:2.3:a:isc:dhcp:4.2.5:*:*:*:*:*:*:* Versions 4.2.5 Vulnerable ·ISC
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 3 products
- Red Hat Enterprise Linux 4
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
Timeline
- 2026-10-02 Threatist record created from CVE-2013-2494
- 2026-10-03 Alias added: GHSA-f5jm-37c8-vx73
References
Advisory 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-2013-2494 · CVE Program
- CVE-2013-2494 · NVD
- FIRST EPSS
- GHSA-f5jm-37c8-vx73 · GitHub Advisory Database · CC BY 4.0
- CVE-2013-2494 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences