HIGH
dhcp: reduced expiration time of an IPv6 lease may cause dhcpd to crash
Published Sep 14, 2012
7.1
HIGHCVSS 2.0
EPSS 21.65%
Description
ISC DHCP 4.1.x before 4.1-ESV-R7 and 4.2.x before 4.2.4-P2 allows remote attackers to cause a denial of service (daemon crash) in opportunistic circumstances by establishing an IPv6 lease in an environment where the lease expiration time is later reduced.
Affected products
No data.
Configuration 1
OR
- 4.1-esv
- 4.1-esv
- 4.1-esv
- 4.1-esv
- 4.1-esv
- 4.1-esv
- 4.1-esv
- 4.1-esv
- 4.1-esv
- 4.1-esv
- 4.1-esv
- 4.1-esv
- 4.1.0
- 4.1.0
- 4.1.0
- 4.1.0
- 4.1.1
- 4.1.1
- 4.1.1
- 4.1.1
- 4.1.1
- 4.1.2
- 4.1.2
- 4.1.2
- 4.1.2
Configuration 2
OR
- 6.0
- 7.0
Configuration 3
OR
- 10.04
- 11.04
- 11.10
- 12.04
No data.
Red Hat Enterprise Linux 6
dhcp-12:4.1.1-34.P1.el6
Fixed · RHSA-2013:0504
Red Hat Enterprise Linux 5
dhcp
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | dhcp-12:4.1.1-34.P1.el6 | Fixed | RHSA-2013:0504 |
| Red Hat Enterprise Linux 5 | dhcp | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect the version of dhcp as shipped with Red Hat Enterprise Linux 5.
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.
7.1 HIGH NVD
AV:N/AC:M/Au:N/C:N/I:N/A:C
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
21.65% 0.21653
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.21653
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 (21 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 21.65% (0.21653) | 97.56th | v5 (v2026.06.15) |
| Jun 15, 2026 | 21.65% (0.21653) | 97.31th | v5 (v2026.06.15) |
| May 24, 2026 | 17.44% (0.17439) | 95.16th | v4 (v2025.03.14) |
| May 16, 2026 | 15.52% (0.15519) | 94.74th | v4 (v2025.03.14) |
| May 2, 2026 | 16.82% (0.16816) | 94.97th | v4 (v2025.03.14) |
| Sep 11, 2025 | 12.10% (0.12095) | 93.56th | v4 (v2025.03.14) |
| Jun 9, 2025 | 20.03% (0.20025) | 95.15th | v4 (v2025.03.14) |
| May 15, 2025 | 15.77% (0.15774) | 94.34th | v4 (v2025.03.14) |
| Apr 14, 2025 | 20.03% (0.20025) | 95.01th | v4 (v2025.03.14) |
| Mar 30, 2025 | 25.01% (0.25011) | 95.71th | v4 (v2025.03.14) |
| Mar 29, 2025 | 23.34% (0.23342) | 93.48th | v4 (v2025.03.14) |
| Mar 27, 2025 | 25.01% (0.25011) | 95.43th | v4 (v2025.03.14) |
| Mar 25, 2025 | 20.03% (0.20025) | 94.96th | v4 (v2025.03.14) |
| Mar 19, 2025 | 25.01% (0.25011) | 95.51th | v4 (v2025.03.14) |
| Mar 17, 2025 | 18.24% (0.18244) | 94.70th | v4 (v2025.03.14) |
| Dec 12, 2024 | 2.08% (0.02076) | 89.52th | v3 (v2023.03.01) |
| Apr 14, 2024 | 2.08% (0.02076) | 88.88th | v3 (v2023.03.01) |
| Feb 10, 2024 | 2.43% (0.02433) | 89.62th | v3 (v2023.03.01) |
| Mar 7, 2023 | 3.41% (0.03408) | 89.95th | v3 (v2023.03.01) |
| Mar 6, 2023 | 23.60% (0.23599) | 96.71th | v2 (v2022.01.01) |
| Feb 4, 2022 | 23.60% (0.23599) | 94.79th | v2 (v2022.01.01) |
Weaknesses (0)
No CWE recorded.
References (20)
- http://lists.fedoraproject.org/pipermail/package-announce/2012-October/088882.html vendor-advisoryx_refsource_FEDORAThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2012-September/086992.html vendor-advisoryx_refsource_FEDORAThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2012-September/088220.html vendor-advisoryx_refsource_FEDORAThird Party Advisory
- http://lists.opensuse.org/opensuse-updates/2012-09/msg00088.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-updates/2012-09/msg00103.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-updates/2012-09/msg00105.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2013-0504.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://secunia.com/advisories/51318 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://security.gentoo.org/glsa/glsa-201301-06.xml vendor-advisoryx_refsource_GENTOOThird Party Advisory
- http://www.debian.org/security/2012/dsa-2551 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.mandriva.com/security/advisories?name=MDVSA-2012:153 vendor-advisoryx_refsource_MANDRIVAThird Party Advisory
- http://www.securityfocus.com/bid/55530 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id?1027528 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://www.ubuntu.com/usn/USN-1571-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2012-3955 Vendor Advisory
- https://blogs.oracle.com/sunsecurity/entry/cve_2012_3955_denial_of x_refsource_CONFIRMThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=856766 Issue Tracking
- https://kb.isc.org/article/AA-00779 x_refsource_CONFIRMVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2012-3955
- https://www.cve.org/CVERecord?id=CVE-2012-3955
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Sep 14, 2012
Updated Aug 6, 2024
Reserved Jul 11, 2012
Link CVE-2012-3955
CISA Vulnrichment
Updated n/a