VULNERABILITY

Oracle Linux: CVE-2018-5733: ELSA-2018-0469: dhcp security update (IMPORTANT) (Multiple Advisories)

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Oracle Linux: CVE-2018-5733: ELSA-2018-0469: dhcp security update (IMPORTANT) (Multiple Advisories)

Severity
5
CVSS
(AV:N/AC:H/Au:N/C:N/I:N/A:C)
Published
02/28/2018
Created
03/05/2020
Added
03/02/2020
Modified
01/07/2025

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. A denial of service flaw was found in the way dhcpd handled reference counting when processing client requests. A malicious DHCP client could use this flaw to trigger a reference count overflow on the server side, potentially causing dhcpd to crash, by sending large amounts of traffic.

Solution(s)

  • oracle-linux-upgrade-dhclient
  • oracle-linux-upgrade-dhcp
  • oracle-linux-upgrade-dhcp-common
  • oracle-linux-upgrade-dhcp-devel
  • oracle-linux-upgrade-dhcp-libs

References

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