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dhcp: stack-based buffer overflow when parsing statements with colon-separated hex digits in config or lease files in dhcpd and dhclient

🗓️ 15 Jun 2021 13:39:23Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 3 Views

DHCP overflow in parsing colon-separated hex options in stored leases, affecting dhcpd and dhclient.

Related
Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux6s390xdhclient12:4.1.1-64.P1.el6_10dhclient-12:4.1.1-64.P1.el6_10.s390x.rpm
Red Hat Enterprise Linux6x86_64dhclient12:4.1.1-64.P1.el6_10dhclient-12:4.1.1-64.P1.el6_10.x86_64.rpm
Red Hat Enterprise Linux6anydhclient12:4.1.1-64.P1.el6_10.i686dhclient-12:4.1.1-64.P1.el6_10.i686.noarch.rpm
Red Hat Enterprise Linux6s390xdhcp12:4.1.1-64.P1.el6_10dhcp-12:4.1.1-64.P1.el6_10.s390x.rpm
Red Hat Enterprise Linux6x86_64dhcp12:4.1.1-64.P1.el6_10dhcp-12:4.1.1-64.P1.el6_10.x86_64.rpm
Red Hat Enterprise Linux6anydhcp12:4.1.1-64.P1.el6_10.i686dhcp-12:4.1.1-64.P1.el6_10.i686.noarch.rpm
Red Hat Enterprise Linux6s390xdhcp-common12:4.1.1-64.P1.el6_10dhcp-common-12:4.1.1-64.P1.el6_10.s390x.rpm
Red Hat Enterprise Linux6x86_64dhcp-common12:4.1.1-64.P1.el6_10dhcp-common-12:4.1.1-64.P1.el6_10.x86_64.rpm
Red Hat Enterprise Linux6anydhcp-common12:4.1.1-64.P1.el6_10.i686dhcp-common-12:4.1.1-64.P1.el6_10.i686.noarch.rpm
Red Hat Enterprise Linux6s390dhcp-debuginfo12:4.1.1-64.P1.el6_10dhcp-debuginfo-12:4.1.1-64.P1.el6_10.s390.rpm
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28 Jun 2026 12:14Current
6.1Medium risk
Vulners AI Score6.1
CVSS 23.3
CVSS 3.17.4
EPSS0.06118
3