RedHat: RHSA-2021-2419:01 Important: dhcp security update
Summary
The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows
individual devices on an IP network to get their own network configuration
information, including an IP address, a subnet mask, and a broadcast
address. The dhcp packages provide a relay agent and ISC DHCP service
required to enable and administer DHCP on a network.
Security Fix(es):
* dhcp: stack-based buffer overflow when parsing statements with
colon-separated hex digits in config or lease files in dhcpd and dhclient
(CVE-2021-25217)
For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.
Summary
Solution
For details on how to apply this update, which includes the changes
described in this advisory, refer to:
https://access.redhat.com/articles/11258
References
https://access.redhat.com/security/cve/CVE-2021-25217 https://access.redhat.com/security/updates/classification/#important
Package List
Red Hat Enterprise Linux Server (v. 6 ELS):
Source:
dhcp-4.1.1-64.P1.el6_10.src.rpm
i386:
dhclient-4.1.1-64.P1.el6_10.i686.rpm
dhcp-4.1.1-64.P1.el6_10.i686.rpm
dhcp-common-4.1.1-64.P1.el6_10.i686.rpm
dhcp-debuginfo-4.1.1-64.P1.el6_10.i686.rpm
s390x:
dhclient-4.1.1-64.P1.el6_10.s390x.rpm
dhcp-4.1.1-64.P1.el6_10.s390x.rpm
dhcp-common-4.1.1-64.P1.el6_10.s390x.rpm
dhcp-debuginfo-4.1.1-64.P1.el6_10.s390x.rpm
x86_64:
dhclient-4.1.1-64.P1.el6_10.x86_64.rpm
dhcp-4.1.1-64.P1.el6_10.x86_64.rpm
dhcp-common-4.1.1-64.P1.el6_10.x86_64.rpm
dhcp-debuginfo-4.1.1-64.P1.el6_10.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 6 ELS):
i386:
dhcp-debuginfo-4.1.1-64.P1.el6_10.i686.rpm
dhcp-devel-4.1.1-64.P1.el6_10.i686.rpm
s390x:
dhcp-debuginfo-4.1.1-64.P1.el6_10.s390.rpm
dhcp-debuginfo-4.1.1-64.P1.el6_10.s390x.rpm
dhcp-devel-4.1.1-64.P1.el6_10.s390.rpm
dhcp-devel-4.1.1-64.P1.el6_10.s390x.rpm
x86_64:
dhcp-debuginfo-4.1.1-64.P1.el6_10.i686.rpm
dhcp-debuginfo-4.1.1-64.P1.el6_10.x86_64.rpm
dhcp-devel-4.1.1-64.P1.el6_10.i686.rpm
dhcp-devel-4.1.1-64.P1.el6_10.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
Topic
An update for dhcp is now available for Red Hat Enterprise Linux 6 ExtendedLifecycle Support.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux Server (v. 6 ELS) - i386, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 6 ELS) - i386, s390x, x86_64
Bugs Fixed
1963258 - CVE-2021-25217 dhcp: stack-based buffer overflow when parsing statements with colon-separated hex digits in config or lease files in dhcpd and dhclient