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&os; &release.current; Release Notes The &os; Project $FreeBSD$ 2020 The &os; Documentation Project &tm-attrib.freebsd; &tm-attrib.ibm; &tm-attrib.ieee; &tm-attrib.intel; &tm-attrib.sparc; &tm-attrib.general; The release notes for &os; &release.current; contain a summary of the changes made to the &os; base system on the &release.branch; development line. This document lists applicable security advisories that were issued since the last release, as well as significant changes to the &os; kernel and userland. Some brief remarks on upgrading are also presented. Introduction This document contains the release notes for &os; &release.current;. It describes recently added, changed, or deleted features of &os;. It also provides some notes on upgrading from previous versions of &os;. The &release.type; distribution to which these release notes apply represents the latest point along the &release.branch; development branch since &release.branch; was created. Information regarding pre-built, binary &release.type; distributions along this branch can be found at &release.url;. The &release.type; distribution to which these release notes apply represents a point along the &release.branch; development branch between &release.prev; and the future &release.next;. Information regarding pre-built, binary &release.type; distributions along this branch can be found at &release.url;. This distribution of &os; &release.current; is a &release.type; distribution. It can be found at &release.url; or any of its mirrors. More information on obtaining this (or other) &release.type; distributions of &os; can be found in the Obtaining &os; appendix to the &os; Handbook. All users are encouraged to consult the release errata before installing &os;. The errata document is updated with late-breaking information discovered late in the release cycle or after the release. Typically, it contains information on known bugs, security advisories, and corrections to documentation. An up-to-date copy of the errata for &os; &release.current; can be found on the &os; Web site. This document describes the most user-visible new or changed features in &os; since &release.prev;. In general, changes described here are unique to the &release.branch; branch unless specifically marked as &merged; features. Typical release note items document recent security advisories issued after &release.prev;, new drivers or hardware support, new commands or options, major bug fixes, or contributed software upgrades. They may also list changes to major ports/packages or release engineering practices. Clearly the release notes cannot list every single change made to &os; between releases; this document focuses primarily on security advisories, user-visible changes, and major architectural improvements. Upgrading from Previous Releases of &os; Binary upgrades between RELEASE versions (and snapshots of the various security branches) are supported using the &man.freebsd-update.8; utility. The binary upgrade procedure will update unmodified userland utilities, as well as unmodified GENERIC kernels distributed as a part of an official &os; release. The &man.freebsd-update.8; utility requires that the host being upgraded have Internet connectivity. Source-based upgrades (those based on recompiling the &os; base system from source code) from previous versions are supported, according to the instructions in /usr/src/UPDATING. Upgrading &os; should only be attempted after backing up all data and configuration files. Security and Errata This section lists the various Security Advisories and Errata Notices since &release.prev;. Security Advisories Advisory Date Topic - No advisories. -   -   + FreeBSD-SA-19:25.mcepce + 12 November 2019 + Machine Check Exception on Page Size + Change + + + FreeBSD-SA-19:26.mcu + 12 November 2019 + Intel CPU Microcode Update + + + + FreeBSD-SA-20:01.libfetch + 28 January 2020 + &man.fetch.3; buffer overflow + + + + FreeBSD-SA-20:03.thrmisc + 28 January 2020 + Kernel stack data disclosure + + + + FreeBSD-SA-20:04.tcp + 18 March 2020 + TCP IPv6 SYN cache kernel information + disclosure + + + + FreeBSD-SA-20:05.if_oce_ioctl + 18 March 2020 + Insufficient &man.ioctl.2; privilege + checking + + + + FreeBSD-SA-20:06.if_ixl_ioctl + 18 March 2020 + Insufficient &man.ioctl.2; privilege + checking + + + + FreeBSD-SA-20:07.epair + 18 March 2020 + Incorrect user-controlled pointer + use + + + + FreeBSD-SA-20:08.jail + 18 March 2020 + Kernel memory disclosure with nested + jails + + + + FreeBSD-SA-20:09.ntp + 18 March 2020 + Multiple denial of service + + + + FreeBSD-SA-20:10.ipfw + 21 April 2020 + Invalid &man.mbuf.9; handling + + + + FreeBSD-SA-20:11.openssl + 21 April 2020 + Remote denial of service + + + + FreeBSD-SA-20:12.libalias + 12 May 2020 + Insufficient packet length + validation + + + + FreeBSD-SA-20:13.libalias + 12 May 2020 + Memory disclosure vulnerability + + + + FreeBSD-SA-20:15.cryptodev + 12 May 2020 + Use-after-free condition + + + + FreeBSD-SA-20:16.cryptodev + 12 May 2020 + Insufficient MAC key length check + + + + FreeBSD-SA-20:17.usb + 9 June 2020 + HID descriptor parsing + error + + + + FreeBSD-SA-20:19.unbound + 8 July 2020 + Multiple vulnerabilities + + + + FreeBSD-SA-20:20.ipv6 + 8 July 2020 + Race condition and use-after-free + + + + FreeBSD-SA-20:21.usb_net + 5 August 2020 + Memory corruption + + + + FreeBSD-SA-20:22.sqlite + 5 August 2020 + Multiple vulnerabilities + + + + FreeBSD-SA-20:23.sendmsg + 5 August 2020 + Privilege escalation + + + + FreeBSD-SA-20:25.sctp + 2 September 2020 + Use-after-free bug + + + + FreeBSD-SA-20:26.dhclient + 2 September 2020 + Heap overflow + + + + FreeBSD-SA-20:27.ure + 15 September 2020 + Packet-in-packet attack + + + + FreeBSD-SA-20:28.bhyve_vmcs + 15 September 2020 + Privilege escalation via VMCS + + + + FreeBSD-SA-20:29.bhyve_svm + 15 September 2020 + SVM guest escape + + + + FreeBSD-SA-20:30.ftpd + 15 September 2020 + Privilege escalation + Errata Notices Errata Date Topic - No notices. -   -   + FreeBSD-EN-19:19.loader + 12 November 2019 + UEFI Loader Memory Fragmentation + + + + FreeBSD-EN-20:01.ssp + 28 January 2020 + Imprecise orderring of canary + initialization + + + + FreeBSD-EN-20:03.sshd + 18 March 2020 + Misleading log messages upon successful + login + + + + FreeBSD-EN-20:05.mlx5en + 18 March 2020 + Fix packet forwarding performance + + + + FreeBSD-EN-20:06.ipv6 + 18 March 2020 + Incorrect checksum calculations + + + + FreeBSD-EN-20:07.quotad + 21 April 2020 + Regression with certain NFS + servers + + + + FreeBSD-EN-20:08.tzdata + 12 May 2020 + Timezone database update + + + + FreeBSD-EN-20:09.igb + 12 May 2020 + Fix failure to switch to inactive + state + + + + FreeBSD-EN-20:10.build + 12 May 2020 + Incorrect build host clang version + detection + + + + FreeBSD-EN-20:11.ena + 9 June 2020 + Stability issues in &man.ena.4; + + + + FreeBSD-EN-20:12.iflib + 9 June 2020 + Watchdog timeout resetting idle + queues + + + + FreeBSD-EN-20:13.bhyve + 8 July 2020 + Crash with PCI device passthrough + + + + FreeBSD-EN-20:14.linuxkpi + 8 July 2020 + Kernel panic + + + + FreeBSD-EN-20:15.mps + 8 July 2020 + Kernel panic + + + + FreeBSD-EN-20:16.vmx + 5 August 2020 + Packet loss and degraded + performance + + + + FreeBSD-EN-20:17.linuxthread + 2 September 2020 + Kernel panic Userland This section covers changes and additions to userland applications, contributed software, and system utilities. Userland Configuration Changes   Userland Application Changes The &man.dd.1; utility has been updated to include new operands: conv=fsync conf=fdatasync oflag=fsync oflag=sync iflag=fullblock See &man.dd.1; for usage details. Contributed Software The &man.tcsh.1; utility has been updated to version 6.21.00. The &man.less.1; utility has been updated to version v551. The &man.libbsdxml.3; library has been updated to version 2.2.9. The &man.resolvconf.8; utility has been updated to version 3.9.2. The &man.pcap.3; library has been updated to version 1.9.1. The &man.tcpdump.1; utility has been updated to version 4.9.3. The &man.mtree.8; utility has been updated to address an issue with -f not considering type changes, fix username logic with -c when &man.getlogin.2; fails, and to fix -O not descending when a hash collision occurs. The Elf Tool Chain has been updated to upstream revision r3769. The &man.xz.1; utility has been updated to version 5.2.5. OpenSSL has been updated to version 1.1.1g. OpenSSH has been updated to version 7.9p1. The timezone database files have been updated to version 2020a. The &man.unbound.8; utility has been updated to version 1.10.1. The &man.libarchive.3; library has been updated to version 3.4.3. The private apr library has been updated to version 1.7.0. The svn{,lite} utility has been updated to version 1.14.0 LTS. The &man.ntpd.8; suite of utilities have been updated to version 4.2.8p15. The &man.file.1; utility has been updated to version 5.39. The &man.bc.1; utility has been updated to version 3.1.1. The private sqlite3 utility has been updated to version 3.32.3. The BSD &man.make.1; utility has been updated to version 20200719. The Sendmail utility has been updated to version 8.16.1. The &man.nc.1; utility has been updated to include a new --sctp flag. The clang, llvm, lld, lldb, compiler-rt utilities and libc++ have been updated to version 10.0.1. Deprecated Applications The &man.amd.8; utility has been marked as deprecated, and targeted for removal in &os; 13.0. Runtime Libraries and API   Kernel This section covers changes to kernel configurations, system tuning, and system control parameters that are not otherwise categorized. General Kernel Changes The &man.read.2; system call has been changed to disable read() calls on directories by default. A new &man.sysctl.8; has been added, security.bsd.allow_read_dir, which when set to 1 will restore the previous behavior. Devices and Drivers This section covers changes and additions to devices and device drivers since &release.prev;. Device Drivers   Storage This section covers changes and additions to file systems and other storage subsystems, both local and networked. General Storage   Boot Loader Changes This section covers the boot loader, boot menu, and other boot-related changes. Boot Loader Changes   Networking This section describes changes that affect networking in &os;. General Network   Ports Collection and Package Infrastructure This section covers changes to the &os; Ports Collection, package infrastructure, and package maintenance and installation tools. Packaging Changes   General Notes Regarding Future &os; Releases Default <varname>CPUTYPE</varname> Change Starting with &os;-13.0, the default CPUTYPE for the &arch.i386; architecture will change from 486 to 686. This means that, by default, binaries produced will require a 686-class CPU, including but not limited to binaries provided by the &os; Release Engineering team. &os; 13.0 will continue to support older CPUs, however users needing this functionality will need to build their own releases for official support. As the primary use for i486 and i586 CPUs is generally in the embedded market, the general end-user impact is expected to be minimal, as new hardware with these CPU types has long faded, and much of the deployed base of such systems is nearing retirement age, statistically. There were several factors taken into account for this change. For example, i486 does not have 64-bit atomics, and while they can be emulated in the kernel, they cannot be emulated in the userland. Additionally, the 32-bit amd64 libraries have been i686 since their inception. As the majority of 32-bit testing is done by developers using the lib32 libraries on 64-bit hardware with the COMPAT_FREEBSD32 option in the kernel, this change ensures better coverage and user experience. This also aligns with what the majority of &linux; distributions have been doing for quite some time. This is expected to be the final bump of the default CPUTYPE in &arch.i386;. This change does not affect the &os; 12.x or 11.x series of releases.