CVE-2019-6470
What it is
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.
At a glance
- Exploitability
- Can be exploited from the same network segment without logging in. High risk of service disruption.
- Exploit odds
- 8.8% chance of exploitation in the next 30 days (EPSS).
- Fix
- No patch or advisory is linked yet. Look at mitigations or restrict exposure.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 8.8% in the next 30 days (EPSS).
- Severity: 6.5 MEDIUM (CVSS).
- Fix: none linked yet, which raises it.
Details
- Published
- Last modified
- Exploit probability
- 8.8% · EPSS, next 30 days
- Record status
- Analyzed
Affected
- Isc Dhcpd < 4.4.1
- Redhat Enterprise Linux 8.0
- Redhat Enterprise Linux Desktop 7.0
- Redhat Enterprise Linux Eus 8.1
- Redhat Enterprise Linux Eus 8.2
- Redhat Enterprise Linux Eus 8.4
- Redhat Enterprise Linux Eus 8.6
- Redhat Enterprise Linux Eus 8.8
Attack profile CVSS 3.1 · 6.5
- Attack vector
- Adjacent network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Raw vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2019-6470.md and follow it. Check whether this project is affected by CVE-2019-6470. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
References
- https://access.redhat.com/errata/RHSA-2019:2060
- https://access.redhat.com/errata/RHSA-2019:3525
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=896122
- https://lists.opensuse.org/opensuse-security-announce/2019-10/msg00048.html
- https://lists.opensuse.org/opensuse-security-announce/2019-10/msg00049.html
- https://access.redhat.com/errata/RHSA-2019:2060
- https://access.redhat.com/errata/RHSA-2019:3525
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=896122
- https://lists.opensuse.org/opensuse-security-announce/2019-10/msg00048.html
- https://lists.opensuse.org/opensuse-security-announce/2019-10/msg00049.html