CVE & CISA-KEV Catalog

CVE-2015-8605

MEDIUMEPSS 100th pctl
6.5
CVSS v3
NVD

Description

ISC 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 crash) via an invalid length field in a UDP IPv4 packet.

CWE-20Improper Input Validation

How to fix

Remediation Available
isc-dhcpDebian
Fixed in:4.3.3-7CVE-2015-8605
Fixed in:4.3.3-7CVE-2015-8605
isc-dhcpUbuntu
Fixed in:4.2.4-7ubuntu12.4USN-2868-1

This Ubuntu release reached end-of-life on 2019-04-02.

isc-dhcp-clientUbuntu
Fixed in:4.2.4-7ubuntu12.4USN-2868-1

This Ubuntu release reached end-of-life on 2019-04-02.

isc-dhcp-relayUbuntu
Fixed in:4.2.4-7ubuntu12.4USN-2868-1

This Ubuntu release reached end-of-life on 2019-04-02.

isc-dhcp-serverUbuntu
Fixed in:4.2.4-7ubuntu12.4USN-2868-1

This Ubuntu release reached end-of-life on 2019-04-02.

isc-dhcp-server-ldapUbuntu
Fixed in:4.2.4-7ubuntu12.4USN-2868-1

This Ubuntu release reached end-of-life on 2019-04-02.

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Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorAdjacent
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityNone
AvailabilityHigh

CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

76.45%probability of exploitation in 30 days
100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

References

Vendor Advisory1

Related Vulnerabilities

Other CWE-20 (Improper Input Validation) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2024-3400Critical10.0100%KEV + Ransom-
CVE-2021-45105Medium5.9100%-Fix
CVE-2021-44228Critical10.0100%KEV + RansomFix
CVE-2021-21985Critical9.8100%KEV + RansomFix
CVE-2020-3452High7.5100%KEVFix
CVE-2018-7600Critical9.8100%KEV + RansomFix

Common questions

How do I fix CVE-2015-8605?

Published advisories record a fix for 6 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2015-8605 being actively exploited?

Not that we know of. CVE-2015-8605 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 76.4% is the estimated probability that it will be exploited in the next 30 days. That is higher than 100% of all scored CVEs.

How severe is CVE-2015-8605?

CVE-2015-8605 has a CVSS v3 base score of 6.5, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2015-8605 affect?

Published advisories record a fix for isc-dhcp (Debian), isc-dhcp (Ubuntu), isc-dhcp-client (Ubuntu), isc-dhcp-relay (Ubuntu), and 2 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-17.