ASA-202004-3 log original external raw

[ASA-202004-3] linux-lts: privilege escalation
Arch Linux Security Advisory ASA-202004-3 ========================================= Severity: High Date : 2020-04-01 CVE-ID : CVE-2020-8835 Package : linux-lts Type : privilege escalation Remote : No Link : Summary ======= The package linux-lts before version 5.4.28-2 is vulnerable to privilege escalation. Resolution ========== Upgrade to 5.4.28-2. # pacman -Syu "linux-lts>=5.4.28-2" The problem has been fixed upstream but no release is available yet. Workaround ========== BPF access can be restricted to privileged users by setting kernel.unprivileged_bpf_disabled to 1: # sysctl -w kernel.unprivileged_bpf_disabled=1 Description =========== An out-of-bounds access flaw was found in the Linux kernel’s implementation of the eBPF code verifier, where an incorrect register bounds calculation while checking 32-bit instructions in an eBPF program occurs. This flaw allows an unprivileged user or process to execute eBPF programs to crash the kernel, resulting in a denial of service or potentially gaining root privileges on the system. Impact ====== An unprivileged local user or process can crash the kernel, resulting in a denial of service, or potentially gain root privileges on the system. References ==========