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TI-2009-00661 Aliases CVE-2009-0692GHSA-cjw8-pp44-m8v2

Stack-based buffer overflow in the script_write_params method in client/dhclient.c in ISC…

Priority MEDIUM 64CWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
Complete · Complete · 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

Stack-based buffer overflow in the script_write_params method in client/dhclient.c in ISC DHCP dhclient 4.1 before 4.1.0p1, 4.0 before 4.0.1p1, 3.1 before 3.1.2p1, 3.0, and 2.0 allows remote DHCP servers to execute arbitrary code via a crafted subnet-mask option.

Why it matters now

EPSS 0.2578 97th 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 · 5

CPEVersionsRoleVendor
cpe:2.3:a:isc:dhcp:2.0:*:*:*:*:*:*:*2.0VulnerableISC
cpe:2.3:a:isc:dhcp:3.0:*:*:*:*:*:*:*3.0VulnerableISC
cpe:2.3:a:isc:dhcp:3.1:*:*:*:*:*:*:*3.1VulnerableISC
cpe:2.3:a:isc:dhcp:4.0:*:*:*:*:*:*:*4.0VulnerableISC
cpe:2.3:a:isc:dhcp:4.1.0:*:*:*:*:*:*:*4.1.0VulnerableISC
  • cpe:2.3:a:isc:dhcp:2.0:*:*:*:*:*:*:* Versions 2.0 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:3.0:*:*:*:*:*:*:* Versions 3.0 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:3.1:*:*:*:*:*:*:* Versions 3.1 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1.0:*:*:*:*:*:*:* Versions 4.1.0 Vulnerable ·ISC

Remediation

Red Hat 2 advisories

  • RHSA-2009:1136 Released 2009-07-14 · Red Hat rating Critical
    dhcp security update
    • Red Hat Enterprise Linux AS EUS (v. 4.7) dhclient-7:3.0.1-62.el4_7.1, dhclient-7:3.0.1-62.el4_7.1.i386, dhclient-7:3.0.1-62.el4_7.1.ia64 +9
    • Red Hat Enterprise Linux AS version 4 dhclient-7:3.0.1-65.el4_8.1, dhclient-7:3.0.1-65.el4_8.1.i386, dhclient-7:3.0.1-65.el4_8.1.ia64 +9
    • Red Hat Enterprise Linux Desktop version 4 dhclient-7:3.0.1-65.el4_8.1, dhclient-7:3.0.1-65.el4_8.1.i386, dhcp-7:3.0.1-65.el4_8.1 +3
    • Red Hat Enterprise Linux ES EUS (v. 4.7) dhclient-7:3.0.1-62.el4_7.1, dhclient-7:3.0.1-62.el4_7.1.i386, dhclient-7:3.0.1-62.el4_7.1.ia64 +6
    • Red Hat Enterprise Linux ES version 4 dhclient-7:3.0.1-65.el4_8.1, dhclient-7:3.0.1-65.el4_8.1.i386, dhclient-7:3.0.1-65.el4_8.1.ia64 +6
    • Red Hat Enterprise Linux WS version 4 dhclient-7:3.0.1-65.el4_8.1, dhclient-7:3.0.1-65.el4_8.1.i386, dhclient-7:3.0.1-65.el4_8.1.ia64 +6
  • RHSA-2009:1154 Released 2009-07-14 · Red Hat rating Critical
    dhcp security update
    • Red Hat Desktop version 3 dhclient-7:3.0.1-10.2_EL3, dhclient-7:3.0.1-10.2_EL3.i386, dhcp-7:3.0.1-10.2_EL3 +3
    • Red Hat Enterprise Linux AS version 3 dhclient-7:3.0.1-10.2_EL3, dhclient-7:3.0.1-10.2_EL3.i386, dhclient-7:3.0.1-10.2_EL3.ia64 +9
    • Red Hat Enterprise Linux ES version 3 dhclient-7:3.0.1-10.2_EL3, dhclient-7:3.0.1-10.2_EL3.i386, dhclient-7:3.0.1-10.2_EL3.ia64 +6
    • Red Hat Enterprise Linux WS version 3 dhclient-7:3.0.1-10.2_EL3, dhclient-7:3.0.1-10.2_EL3.i386, dhclient-7:3.0.1-10.2_EL3.ia64 +6

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Desktop version 3Fixed RHSA-2009:1154
Red Hat Enterprise Linux AS EUS (v. 4.7)Fixed RHSA-2009:1136
Red Hat Enterprise Linux AS version 3Fixed RHSA-2009:1154
Red Hat Enterprise Linux AS version 4Fixed RHSA-2009:1136
Red Hat Enterprise Linux Desktop version 4Fixed RHSA-2009:1136
Red Hat Enterprise Linux ES EUS (v. 4.7)Fixed RHSA-2009:1136
Red Hat Enterprise Linux ES version 3Fixed RHSA-2009:1154
Red Hat Enterprise Linux ES version 4Fixed RHSA-2009:1136
Red Hat Enterprise Linux WS version 3Fixed RHSA-2009:1154
Red Hat Enterprise Linux WS version 4Fixed RHSA-2009:1136

Timeline

  1. 2026-10-02 Threatist record created from CVE-2009-0692
  2. 2026-10-03 Alias added: GHSA-cjw8-pp44-m8v2

References

Patch 1

Advisory 13

Other 7

  • 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-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
  • TI-2011-02408 The server in ISC DHCP 3.x and 4.x before 4.2.2, 3.1-ESV before 3.1-ESV-R3, and 4.1-ESV… CVSS 2.0HIGH 7.8
See all 24 →

Sources

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