ArchLinux: 202106-11: dhcp: arbitrary code execution
Summary
A buffer overrun in the lease file parsing code can be used to exploit a common vulnerability shared by dhcpd and dhclient before version 4.4.2-P1.
Resolution
Upgrade to 4.4.2.P1-1.
# pacman -Syu "dhcp>=4.4.2.P1-1"
The problem has been fixed upstream in version 4.4.2.P1.
References
https://kb.isc.org/docs/cve-2021-25217 https://downloads.isc.org/isc/dhcp/4.4.2-P1/patches/4.4.2.CVE-2021-25217.patch https://security.archlinux.org/CVE-2021-25217
Workaround
None.