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OpenAdvisories
High ELSA-2018-0483 2 CVEs

Important: dhcp security update (Oracle Linux 7)

Published Mar 12, 2018 · Updated Mar 12, 2018

Ecosystem: Oracle Linux

Summary

[12:4.2.5-58.0.1]
- Added oracle-errwarn-message.patch

[12:4.2.5-68]
- Resolves: #1550000 - CVE-2018-5733 Avoid buffer overflow reference counter

[12:4.2.5-58.2]
- Resolves: #1549979 - CVE-2018-5732 Avoid buffer overflow in options parser

Fixed packages 5

ReleasePackageFixed in
Oracle Linux · 7 dhclient 12:4.2.5-58.0.1.el7_4.3
Oracle Linux · 7 dhcp 12:4.2.5-58.0.1.el7_4.3
Oracle Linux · 7 dhcp-common 12:4.2.5-58.0.1.el7_4.3
Oracle Linux · 7 dhcp-devel 12:4.2.5-58.0.1.el7_4.3
Oracle Linux · 7 dhcp-libs 12:4.2.5-58.0.1.el7_4.3

Vulnerabilities 2

  • High 7.5
    CVE-2018-5732

    A specially constructed response from a malicious server can cause a buffer overflow in dhclient

    Failure to properly bounds-check a buffer used for processing DHCP options allows a malicious server (or an entity masquerading as a server) to cause a buffer overflow (and resulting crash) in dhclient by sending a response containing a specially constructed …

    ISC ISC DHCP isc-dhcp isc-dhcp Debian Ubuntu Alpine
  • Medium 5.9
    CVE-2018-5733 EPSS 20%

    A malicious client can overflow a reference counter in ISC dhcpd

    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…

    ISC ISC DHCP isc-dhcp isc-dhcp Debian Ubuntu Alpine