dhcp: error in DDNS processing of DHCPv6 leases can cause ISC dhcpd crash
Published Jan 15, 2012
6.1
MEDIUMCVSS 2.0
EPSS 3.41%
Description
The logging functionality in dhcpd in ISC DHCP before 4.2.3-P2, when using Dynamic DNS (DDNS) and issuing IPv6 addresses, does not properly handle the DHCPv6 lease structure, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via crafted packets related to a lease-status update.
Affected products
No data.
- ≤ 4.2.3
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0.1
- 3.0.1
- 3.0.1
- 3.0.1
- 3.0.1
- 3.0.1
- 3.0.1
- 3.0.1
- 3.0.1
- 3.0.1
- 3.0.1
- 3.0.1
- 3.0.1
- 3.0.1
- 3.0.1
- 3.0.2
- 3.0.2
- 3.0.2
- 3.0.2
- 3.0.2
- 3.0.3
- 3.0.3
- 3.0.3
- 3.0.3
- 3.0.4
- 3.0.4
- 3.0.4
- 3.0.4
- 3.0.4
- 3.0.5
- 3.0.5
- 3.0.6
- 3.1.0
- 3.1.0
- 3.1.0
- 3.1.0
- 3.1.0
- 3.1.0
- 4.0.0
- 4.0.0
- 4.0.0
- 4.0.0
- 4.0.0
- 4.0.0
- 4.0.0
- 4.1.0
- 4.1.0
- 4.1.0
- 4.1.0
- 4.2.0
- 4.2.0
- 4.2.0
- 4.2.0
- 4.2.0
- 4.2.0
- 4.2.1
- 4.2.1
- 4.2.1
- 4.2.2
- 4.2.2
- 4.2.2
- 4.2.3
No data.
Red Hat Enterprise Linux 4
dhcp
Not affected
Red Hat Enterprise Linux 5
dhcp
Not affected
Red Hat Enterprise Linux 6
dhcp
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 4 | dhcp | Not affected | n/a |
| Red Hat Enterprise Linux 5 | dhcp | Not affected | n/a |
| Red Hat Enterprise Linux 6 | dhcp | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Not vulnerable. This issue did not affect the versions of dhcp as shipped with Red Hat Enterprise Linux 4, 5, and 6 as they did not include support for enhanced DDNS logging.
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:A/AC:L/Au:N/C:N/I:N/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 (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.41% (0.03414) | 88.49th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.61% (0.03612) | 87.97th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.93% (0.00934) | 74.55th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.63% (0.00629) | 79.72th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.63% (0.00629) | 78.36th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.63% (0.00629) | 75.75th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.93% (0.01934) | 78.05th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.93% (0.01934) | 76.08th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.93% (0.01934) | 55.24th | v2 (v2022.01.01) |
References (8)
- http://security.gentoo.org/glsa/glsa-201301-06.xml vendor-advisoryx_refsource_GENTOO
- https://access.redhat.com/security/cve/CVE-2011-4868 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=781242 Issue Tracking
- https://deepthought.isc.org/article/AA-00595 x_refsource_CONFIRM
- https://kb.isc.org/article/AA-00705 x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2011-4868
- https://www.cve.org/CVERecord?id=CVE-2011-4868
- https://www.isc.org/software/dhcp/advisories/cve-2011-4868 x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://security.gentoo.org/glsa/glsa-201301-06.xml | vendor-advisoryx_refsource_GENTOO | |
| https://access.redhat.com/security/cve/CVE-2011-4868 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=781242 | Issue Tracking | |
| https://deepthought.isc.org/article/AA-00595 | x_refsource_CONFIRM | |
| https://kb.isc.org/article/AA-00705 | x_refsource_CONFIRM | |
| https://nvd.nist.gov/vuln/detail/CVE-2011-4868 | ||
| https://www.cve.org/CVERecord?id=CVE-2011-4868 | ||
| https://www.isc.org/software/dhcp/advisories/cve-2011-4868 | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.