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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

🗓️ 09 Jun 2021 11:01:07Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 1 Views

Stack overflow in DHCP option parsing of hex digits while reading leases in dhcpd and dhclient.

Related
Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8aarch64dhcp-client12:4.3.6-44.el8_4.1dhcp-client-12:4.3.6-44.el8_4.1.aarch64.rpm
Red Hat Enterprise Linux8ppc64ledhcp-client12:4.3.6-44.el8_4.1dhcp-client-12:4.3.6-44.el8_4.1.ppc64le.rpm
Red Hat Enterprise Linux8s390xdhcp-client12:4.3.6-44.el8_4.1dhcp-client-12:4.3.6-44.el8_4.1.s390x.rpm
Red Hat Enterprise Linux8x86_64dhcp-client12:4.3.6-44.el8_4.1dhcp-client-12:4.3.6-44.el8_4.1.x86_64.rpm
Red Hat Enterprise Linux8aarch64dhcp-client-debuginfo12:4.3.6-44.el8_4.1dhcp-client-debuginfo-12:4.3.6-44.el8_4.1.aarch64.rpm
Red Hat Enterprise Linux8ppc64ledhcp-client-debuginfo12:4.3.6-44.el8_4.1dhcp-client-debuginfo-12:4.3.6-44.el8_4.1.ppc64le.rpm
Red Hat Enterprise Linux8s390xdhcp-client-debuginfo12:4.3.6-44.el8_4.1dhcp-client-debuginfo-12:4.3.6-44.el8_4.1.s390x.rpm
Red Hat Enterprise Linux8x86_64dhcp-client-debuginfo12:4.3.6-44.el8_4.1dhcp-client-debuginfo-12:4.3.6-44.el8_4.1.x86_64.rpm
Red Hat Enterprise Linux8anydhcp-client-debuginfo12:4.3.6-44.el8_4.1.i686dhcp-client-debuginfo-12:4.3.6-44.el8_4.1.i686.noarch.rpm
Red Hat Enterprise Linux8anydhcp-common12:4.3.6-44.el8_4.1.noarchdhcp-common-12:4.3.6-44.el8_4.1.noarch.noarch.rpm
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28 Jun 2026 12:12Current
6.1Medium risk
Vulners AI Score6.1
CVSS 23.3
CVSS 3.17.4
EPSS0.06118
1