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NVD / CVE Program· CNA mitre

CVE-2011-4868: 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…

MediumCVSS 6.1 · v2.0—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 25/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 3.4% (FIRST EPSS); higher than 89% of all records.
  • No special conditions are required; it is repeatable.
  • Fixed version: isc-dhcp (Debian:12) 4.2.2.dfsg.1-5; dhcp (openSUSE:Tumbleweed) 4.3.3.P1-3.1.

Low priority for now. Upgrade to isc-dhcp (Debian:12) 4.2.2.dfsg.1-5; dhcp (openSUSE:Tumbleweed) 4.3.3.P1-3.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

Published
Jan 14, 2012
Updated
Jun 16, 2026
EPSS
3.4% · 89th percentile

Report tools

JSON

Action score

25

Monitor

Low priority for now.

CVSS
24 / 40 · 6.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 3.4%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
iscdhcp

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • isc dhcpup to 4.2.3 inclusive
  • isc dhcp3.0
  • isc dhcp3.0.1
  • isc dhcp3.0.2
  • isc dhcp3.0.3
  • isc dhcp3.0.4
  • isc dhcp3.0.5
  • isc dhcp3.0.6
+7 more rows
  • isc dhcp3.1.0
  • isc dhcp4.0.0
  • isc dhcp4.1.0
  • isc dhcp4.2.0
  • isc dhcp4.2.1
  • isc dhcp4.2.2
  • isc dhcp4.2.3

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12isc-dhcpbefore 4.2.2.dfsg.1-54.2.2.dfsg.1-5
openSUSE:Tumbleweeddhcpbefore 4.3.3.P1-3.14.3.3.P1-3.1

Same product

isc: all records

Other highest-scoring records for the same primary product.

  • CVE-2011-0997dhclient in ISC DHCP 3.0.x through 4.2.x before 4.2.1-P1, 3.1-ESV before 3.1-ESV-R1, and 4.1-ESV before 4.1-ESV-R2 allows remote attackers…
    55Plan
  • CVE-2017-3144Failure to properly clean up closed OMAPI connections can exhaust available sockets
    52Plan
  • CVE-2015-8605ISC DHCP 4.x before 4.1-ESV-R12-P1, 4.2.x, and 4.3.x before 4.3.3-P1 allows remote attackers to cause a denial of service (application…
    51Plan

Published before and after this one in the same product

  • ← EarlierCVE-2011-2749Aug 15, 2011 · 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 before 4.1-ESV-R3 allows remote attackers to cause…
    43Plan
  • ← EarlierCVE-2011-4539Dec 8, 2011 · dhcpd in ISC DHCP 4.x before 4.2.3-P1 and 4.1-ESV before 4.1-ESV-R4 does not properly handle regular expressions in dhcpd.conf, which…
    25Monitor
  • Later →CVE-2012-3570Jul 25, 2012 · Buffer overflow in ISC DHCP 4.2.x before 4.2.4-P1, when DHCPv6 mode is enabled, allows remote attackers to cause a denial of service…
    23Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:isc-dhcp4.2.2.dfsg.1-5 · Debian:12Package registry (OSV)
opensuse:dhcp4.3.3.P1-3.1 · openSUSE:TumbleweedPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
C · the service can be disrupted
Attack complexity
Low
Confidentiality impact
None
Integrity impact
None
Availability impact
C

Weakness class (CWE)

CWE-399 · Resource Management Errors

CVSS vector

AV:A/AC:L/Au:N/C:N/I:N/A:C

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records