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dhcp: DoS due to error in handling malformed client identifiers

🗓️ 03 Aug 2012 00:19:00Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 1 Views

ISC DHCP DoS in versions 4.1.2–4.2.4 and 4.1-ESV before 4.1-ESV-R6 due to malformed client identifiers causing infinite loop and high CPU.

Related
Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux6i686dhclient12:4.1.1-31.P1.el6_3.1dhclient-12:4.1.1-31.P1.el6_3.1.i686.rpm
Red Hat Enterprise Linux6ppc64dhclient12:4.1.1-31.P1.el6_3.1dhclient-12:4.1.1-31.P1.el6_3.1.ppc64.rpm
Red Hat Enterprise Linux6s390xdhclient12:4.1.1-31.P1.el6_3.1dhclient-12:4.1.1-31.P1.el6_3.1.s390x.rpm
Red Hat Enterprise Linux6x86_64dhclient12:4.1.1-31.P1.el6_3.1dhclient-12:4.1.1-31.P1.el6_3.1.x86_64.rpm
Red Hat Enterprise Linux6i686dhcp12:4.1.1-31.P1.el6_3.1dhcp-12:4.1.1-31.P1.el6_3.1.i686.rpm
Red Hat Enterprise Linux6ppc64dhcp12:4.1.1-31.P1.el6_3.1dhcp-12:4.1.1-31.P1.el6_3.1.ppc64.rpm
Red Hat Enterprise Linux6s390xdhcp12:4.1.1-31.P1.el6_3.1dhcp-12:4.1.1-31.P1.el6_3.1.s390x.rpm
Red Hat Enterprise Linux6x86_64dhcp12:4.1.1-31.P1.el6_3.1dhcp-12:4.1.1-31.P1.el6_3.1.x86_64.rpm
Red Hat Enterprise Linux6i686dhcp-common12:4.1.1-31.P1.el6_3.1dhcp-common-12:4.1.1-31.P1.el6_3.1.i686.rpm
Red Hat Enterprise Linux6ppc64dhcp-common12:4.1.1-31.P1.el6_3.1dhcp-common-12:4.1.1-31.P1.el6_3.1.ppc64.rpm
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21 Nov 2025 17:41Current
5.9Medium risk
Vulners AI Score5.9
CVSS 26.1
EPSS0.17426
1