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No exploitation reportedFix available

CVE-2019-6470

No exploitation reported by the sources we read.

  • Published2019-11-01

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

There had existed in one of the ISC BIND libraries a bug in a function that was used by dhcpd when operating in DHCPv6 mode. There was also a bug in dhcpd relating to the use of this function per its documentation, but the bug in the library function prevented this from causing any harm. All releases of dhcpd from ISC contain copies of this, and other, BIND libraries in combinations that have been tested prior to release and are known to not present issues like this. Some third-party packagers of ISC software have modified the dhcpd source, BIND source, or version matchup in ways that create the crash potential. Based on reports available to ISC, the crash probability is large and no analysis has been done on how, or even if, the probability can be manipulated by an attacker. Affects: Builds of dhcpd versions prior to version 4.4.1 when using BIND versions 9.11.2 or later, or BIND versions with specific bug fixes backported to them. ISC does not have access to comprehensive version lists for all repackagings of dhcpd that are vulnerable. In particular, builds from other vendors may also be affected. Operators are advised to consult their vendor documentation.

Timeline

dates in UTC
  1. 2019-11-0123:15CVE publishedNVD

Versions per branch

NVD
Redhat enterprise linux eus
BranchAffectedFixed in
8.1= 8.1no fix published
8.2= 8.2no fix published
8.4= 8.4no fix published
8.6= 8.6no fix published
8.8= 8.8no fix published
Redhat enterprise linux for arm 64 eus
BranchAffectedFixed in
8.1= 8.1_aarch64no fix published
8.2= 8.2_aarch64no fix published
8.4= 8.4_aarch64no fix published
8.6= 8.6_aarch64no fix published
8.8= 8.8_aarch64no fix published
Redhat enterprise linux for ibm z systems eus
BranchAffectedFixed in
8.1= 8.1_s390xno fix published
8.2= 8.2_s390xno fix published
8.4= 8.4_s390xno fix published
8.6= 8.6_s390xno fix published
8.8= 8.8_s390xno fix published

16 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • bindWolfiall versions · fixed in 0
  • bindChainguardall versions · fixed in 0
  • bindAzure Linux:3all versions · fixed in 9.16.44-2
  • bindAzure Linux:2all versions · fixed in 9.16.15-3
  • dhcpSUSE:Linux Enterprise Software Development Kit 12 SP5all versions · fixed in 4.3.3-10.19.1
  • dhcpSUSE:Linux Enterprise Software Development Kit 12 SP4all versions · fixed in 4.3.3-10.19.1
  • dhcpSUSE:Linux Enterprise Server for SAP Applications 12 SP5all versions · fixed in 4.3.3-10.19.1
  • dhcpSUSE:Linux Enterprise Server for SAP Applications 12 SP4all versions · fixed in 4.3.3-10.19.1

29 more package ranges on OSV.dev

Vendor advisories

  • CVE-2019-6470 Red Hat Product Security126 products fixed · 5 known affected

    dhcp: double-deletion of the released addresses in the dhcpv6 code leading to crash and possible DoS

    dhclient as a component of Red Hat Enterprise Linux 6 · dhcp as a component of Red Hat Enterprise Linux 6 · dhcp-common as a component of Red Hat Enterprise Linux 6 · +2 more

  • RHSA-2019:3525 Red Hat Product Security49 products fixed

    Red Hat Security Advisory: dhcp security and bug fix update

  • RHSA-2019:2060 Red Hat Product Security77 products fixed

    Red Hat Security Advisory: dhcp security and bug fix update

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2019:3525 · 49 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  2. No fix planned, says the vendor Red Hat Product Security CVE-2019-6470 · 5 productsOut of support scope

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2019-11-01
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-w4w8-43xj-r4wr

Frequently asked questions

What is CVE-2019-6470?

There had existed in one of the ISC BIND libraries a bug in a function that was used by dhcpd when operating in DHCPv6 mode. There was also a bug in dhcpd relating to the use of this function per its documentation, but the bug in the library function prevented this from causing any harm. All releases of dhcpd from ISC contain copies of this, and other, BIND libraries in combinations that have been tested prior to release and are known to not present issues like this. Some third-party packagers of ISC software have modified the dhcpd source, BIND source, or version matchup in ways that create the crash potential. Based on reports available to ISC, the crash probability is large and no analysis has been done on how, or even if, the probability can be manipulated by an attacker. Affects: Builds of dhcpd versions prior to version 4.4.1 when using BIND versions 9.11.2 or later, or BIND versions with specific bug fixes backported to them. ISC does not have access to comprehensive version lists for all repackagings of dhcpd that are vulnerable. In particular, builds from other vendors may also be affected. Operators are advised to consult their vendor documentation.

Is CVE-2019-6470 actively exploited?

Active exploitation of CVE-2019-6470 has not been confirmed. Its EPSS score was 8.8% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-6470?

CVE-2019-6470 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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Sources for this record