CVE-2012-3955

Dhcp vulnerability

CVSS

7.1

EPSS

21.7%

EPSS pct

97th

Exploited

No known

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 vendor

Isc

Affected product

Dhcp

CVSS vector

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

Published

2012-09-14

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, medium attack complexity, requiring no authentication. Successful exploitation leads to complete impact to availability.

Its EPSS score of 21.7% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 97% of all scored CVEs.

Check your external exposure to CVE-2012-3955

Confirm whether Isc Dhcp is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2012-3955.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2012-3955

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2012-3955 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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