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TI-2012-03095 Aliases CVE-2012-3571GHSA-2fx4-27pj-8f74

ISC DHCP 4.1.2 through 4.2.4 and 4.1-ESV before 4.1-ESV-R6 allows remote attackers to…

Priority MEDIUM 42CWE-119Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Complete
Fix status
Fixed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-119 and the CVSS impact.

Summary

ISC DHCP 4.1.2 through 4.2.4 and 4.1-ESV before 4.1-ESV-R6 allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via a malformed client identifier.

Why it matters now

EPSS 0.12985 96th percentileScored 2026-11-07
Fix Fixed Red Hat: 2 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 33

CPEVersionsRoleVendor
cpe:2.3:a:isc:dhcp:4.1.2:*:*:*:*:*:*:*4.1.2VulnerableISC
cpe:2.3:a:isc:dhcp:4.2.0:-:*:*:*:*:*:*4.2.0VulnerableISC
cpe:2.3:a:isc:dhcp:4.2.0:a1:*:*:*:*:*:*4.2.0 a1VulnerableISC
cpe:2.3:a:isc:dhcp:4.2.0:a2:*:*:*:*:*:*4.2.0 a2VulnerableISC
cpe:2.3:a:isc:dhcp:4.2.0:b1:*:*:*:*:*:*4.2.0 b1VulnerableISC
cpe:2.3:a:isc:dhcp:4.2.0:b2:*:*:*:*:*:*4.2.0 b2VulnerableISC
cpe:2.3:a:isc:dhcp:4.2.0:p1:*:*:*:*:*:*4.2.0 p1VulnerableISC
cpe:2.3:a:isc:dhcp:4.2.0:rc1:*:*:*:*:*:*4.2.0 rc1VulnerableISC
cpe:2.3:a:isc:dhcp:4.2.1:-:*:*:*:*:*:*4.2.1VulnerableISC
cpe:2.3:a:isc:dhcp:4.2.1:b1:*:*:*:*:*:*4.2.1 b1VulnerableISC
  • cpe:2.3:a:isc:dhcp:4.1.2:*:*:*:*:*:*:* Versions 4.1.2 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
Show 23 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:isc:dhcp:4.2.1:rc1:*:*:*:*:*:*4.2.1 rc1VulnerableISC
cpe:2.3:a:isc:dhcp:4.2.2:-:*:*:*:*:*:*4.2.2VulnerableISC
cpe:2.3:a:isc:dhcp:4.2.2:b1:*:*:*:*:*:*4.2.2 b1VulnerableISC
cpe:2.3:a:isc:dhcp:4.2.2:rc1:*:*:*:*:*:*4.2.2 rc1VulnerableISC
cpe:2.3:a:isc:dhcp:4.2.3:-:*:*:*:*:*:*4.2.3VulnerableISC
cpe:2.3:a:isc:dhcp:4.2.3:p1:*:*:*:*:*:*4.2.3 p1VulnerableISC
cpe:2.3:a:isc:dhcp:4.2.3:p2:*:*:*:*:*:*4.2.3 p2VulnerableISC
cpe:2.3:a:isc:dhcp:4.2.4:*:*:*:*:*:*:*4.2.4VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:-:*:*:*:*:*:*4.1-esvVulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r1:*:*:*:*:*:*4.1-esv r1VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r2:*:*:*:*:*:*4.1-esv r2VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r3:*:*:*:*:*:*4.1-esv r3VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r3_b1:*:*:*:*:*:*4.1-esv r3_b1VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r4:*:*:*:*:*:*4.1-esv r4VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r5:*:*:*:*:*:*4.1-esv r5VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r5_b1:*:*:*:*:*:*4.1-esv r5_b1VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r5_rc1:*:*:*:*:*:*4.1-esv r5_rc1VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r5_rc2:*:*:*:*:*:*4.1-esv r5_rc2VulnerableISC
cpe:2.3:o:canonical:ubuntu_linux:11.04:*:*:*:*:*:*:*11.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:11.10:*:*:*:*:*:*:*11.10VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*12.04VulnerableCanonical
cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:*6.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*7.0VulnerableDebian
  • cpe:2.3:a:isc:dhcp:4.2.1:rc1:*:*:*:*:*:* Versions 4.2.1 rc1 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:4.1-esv:-:*:*:*:*:*:* Versions 4.1-esv Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r1:*:*:*:*:*:* Versions 4.1-esv r1 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r2:*:*:*:*:*:* Versions 4.1-esv r2 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r3:*:*:*:*:*:* Versions 4.1-esv r3 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r3_b1:*:*:*:*:*:* Versions 4.1-esv r3_b1 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r4:*:*:*:*:*:* Versions 4.1-esv r4 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r5:*:*:*:*:*:* Versions 4.1-esv r5 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r5_b1:*:*:*:*:*:* Versions 4.1-esv r5_b1 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r5_rc1:*:*:*:*:*:* Versions 4.1-esv r5_rc1 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r5_rc2:*:*:*:*:*:* Versions 4.1-esv r5_rc2 Vulnerable ·ISC
  • cpe:2.3:o:canonical:ubuntu_linux:11.04:*:*:*:*:*:*:* Versions 11.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:11.10:*:*:*:*:*:*:* Versions 11.10 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:* Versions 12.04 Vulnerable ·Canonical
  • cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Debian

Remediation

Red Hat 2 advisories

  • RHSA-2012:1141 Released 2012-08-03 · Red Hat rating Moderate
    dhcp security update
    • Red Hat Enterprise Linux Desktop (v. 6) dhclient-12:4.1.1-31.P1.el6_3.1, dhcp-12:4.1.1-31.P1.el6_3.1, dhcp-common-12:4.1.1-31.P1.el6_3.1
    • Red Hat Enterprise Linux Desktop Optional (v. 6) dhcp-12:4.1.1-31.P1.el6_3.1, dhcp-devel-12:4.1.1-31.P1.el6_3.1
    • Red Hat Enterprise Linux HPC Node (v. 6) dhclient-12:4.1.1-31.P1.el6_3.1, dhcp-12:4.1.1-31.P1.el6_3.1, dhcp-common-12:4.1.1-31.P1.el6_3.1
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) dhcp-12:4.1.1-31.P1.el6_3.1, dhcp-devel-12:4.1.1-31.P1.el6_3.1
    • Red Hat Enterprise Linux Server (v. 6) dhclient-12:4.1.1-31.P1.el6_3.1, dhcp-12:4.1.1-31.P1.el6_3.1, dhcp-common-12:4.1.1-31.P1.el6_3.1
    • Red Hat Enterprise Linux Server Optional (v. 6) dhcp-12:4.1.1-31.P1.el6_3.1, dhcp-devel-12:4.1.1-31.P1.el6_3.1, dhcp-devel-12:4.1.1-31.P1.el6_3.1.ppc
    • Red Hat Enterprise Linux Workstation (v. 6) dhclient-12:4.1.1-31.P1.el6_3.1, dhcp-12:4.1.1-31.P1.el6_3.1, dhcp-common-12:4.1.1-31.P1.el6_3.1
    • Red Hat Enterprise Linux Workstation Optional (v. 6) dhcp-12:4.1.1-31.P1.el6_3.1, dhcp-devel-12:4.1.1-31.P1.el6_3.1
  • RHSA-2012:1140 Released 2012-08-03 · Red Hat rating Moderate
    dhcp security update
    • RHEL Desktop Workstation (v. 5 client) dhcp-12:3.0.5-31.el5_8.1, dhcp-12:3.0.5-31.el5_8.1.i386, dhcp-devel-12:3.0.5-31.el5_8.1 +3
    • Red Hat Enterprise Linux (v. 5 server) dhclient-12:3.0.5-31.el5_8.1, dhclient-12:3.0.5-31.el5_8.1.i386, dhclient-12:3.0.5-31.el5_8.1.ia64 +17
    • Red Hat Enterprise Linux Desktop (v. 5 client) dhclient-12:3.0.5-31.el5_8.1, dhclient-12:3.0.5-31.el5_8.1.i386, dhcp-12:3.0.5-31.el5_8.1 +2

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
RHEL Desktop Workstation (v. 5 client)Fixed RHSA-2012:1140
Red Hat Enterprise Linux (v. 5 server)Fixed RHSA-2012:1140
Red Hat Enterprise Linux Desktop (v. 5 client)Fixed RHSA-2012:1140
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2012:1141
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2012:1141
Red Hat Enterprise Linux HPC Node (v. 6)Fixed RHSA-2012:1141
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2012:1141
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2012:1141
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2012:1141
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2012:1141
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2012:1141

Timeline

  1. 2026-10-02 Threatist record created from CVE-2012-3571
  2. 2026-10-03 Alias added: GHSA-2fx4-27pj-8f74

References

Advisory 12

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences