dhclient: stack overflow leads to arbitrary code execution as root
Published Jul 14, 2009
10.0
HIGHCVSS 2.0
EPSS 25.78%
Description
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.
Affected products
No data.
No data.
Red Hat Enterprise Linux 3
dhcp-7:3.0.1-10.2_EL3
Fixed · RHSA-2009:1154
Red Hat Enterprise Linux 4
dhcp-7:3.0.1-65.el4_8.1
Fixed · RHSA-2009:1136
Red Hat Enterprise Linux 4.7 Z Stream
dhcp-7:3.0.1-62.el4_7.1
Fixed · RHSA-2009:1136
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 3 | dhcp-7:3.0.1-10.2_EL3 | Fixed | RHSA-2009:1154 |
| Red Hat Enterprise Linux 4 | dhcp-7:3.0.1-65.el4_8.1 | Fixed | RHSA-2009:1136 |
| Red Hat Enterprise Linux 4.7 Z Stream | dhcp-7:3.0.1-62.el4_7.1 | Fixed | RHSA-2009:1136 |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue affected the dhcp packages as shipped with Red Hat Enterprise Linux 3 and 4. This issue did not affect the dhcp packages as shipped with Red Hat Enterprise Linux 5 due to the use of FORTIFY_SOURCE protection mechanism that changes the exploitability of the issue into a controlled application termination.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 25.78% (0.25780) | 97.91th | v5 (v2026.06.15) |
| Jun 15, 2026 | 25.78% (0.25780) | 97.70th | v5 (v2026.06.15) |
| Mar 30, 2025 | 28.13% (0.28133) | 96.06th | v4 (v2025.03.14) |
| Mar 29, 2025 | 34.11% (0.34107) | 95.30th | v4 (v2025.03.14) |
| Mar 19, 2025 | 28.13% (0.28133) | 95.88th | v4 (v2025.03.14) |
| Mar 17, 2025 | 22.76% (0.22756) | 95.42th | v4 (v2025.03.14) |
| Dec 17, 2024 | 12.59% (0.12588) | 95.43th | v3 (v2023.03.01) |
| Sep 1, 2023 | 7.61% (0.07614) | 93.30th | v3 (v2023.03.01) |
| Jun 2, 2023 | 7.34% (0.07337) | 93.09th | v3 (v2023.03.01) |
| Apr 19, 2023 | 7.92% (0.07919) | 93.27th | v3 (v2023.03.01) |
| Mar 7, 2023 | 7.25% (0.07248) | 92.95th | v3 (v2023.03.01) |
| Mar 6, 2023 | 27.99% (0.27992) | 97.24th | v2 (v2022.01.01) |
| Feb 4, 2022 | 27.99% (0.27992) | 95.99th | v2 (v2022.01.01) |
References (39)
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- https://nvd.nist.gov/vuln/detail/CVE-2009-0692
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Change history (0)
No recorded changes yet.