Arch Linux Security Advisory ASA-202106-10 ========================================== Severity: High Date : 2021-06-01 CVE-ID : CVE-2021-25217 Package : dhclient Type : arbitrary code execution Remote : Yes Link : https://security.archlinux.org/AVG-2004 Summary ======= The package dhclient before version 4.4.2.P1-1 is vulnerable to arbitrary code execution. Resolution ========== Upgrade to 4.4.2.P1-1. # pacman -Syu "dhclient>=4.4.2.P1-1" The problem has been fixed upstream in version 4.4.2.P1. Workaround ========== None. Description =========== 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. Impact ====== An attacker could crash the DHCP client, or potentially execute arbitrary code, through a crafted lease file. 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.pat... https://security.archlinux.org/CVE-2021-25217