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Ubuntu: (Multiple Advisories) (CVE-2018-5733): DHCP vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2018-5733): DHCP vulnerabilities

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:P)
Published
03/01/2018
Created
07/25/2018
Added
04/26/2018
Modified
03/02/2020

Description

A malicious client which is allowed to send very large amounts of traffic (billions of packets) to a DHCP server can eventually overflow a 32-bit reference counter, potentially causing dhcpd to crash. Affects ISC DHCP 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0.

Solution(s)

  • ubuntu-upgrade-isc-dhcp-client
  • ubuntu-upgrade-isc-dhcp-relay
  • ubuntu-upgrade-isc-dhcp-server
  • ubuntu-upgrade-isc-dhcp-server-ldap

References

  • USN-3586-1
  • USN-3586-2
  • CVE-2018-5733

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