Updated Debian 10: 10.9 released

March 27th, 2021

The Debian project is pleased to announce the ninth update of its stable distribution Debian 10 (codename buster). This point release mainly adds corrections for security issues, along with a few adjustments for serious problems. Security advisories have already been published separately and are referenced where available.

Please note that the point release does not constitute a new version of Debian 10 but only updates some of the packages included. There is no need to throw away old buster media. After installation, packages can be upgraded to the current versions using an up-to-date Debian mirror.

Those who frequently install updates from security.debian.org won't have to update many packages, and most such updates are included in the point release.

New installation images will be available soon at the regular locations.

Upgrading an existing installation to this revision can be achieved by pointing the package management system at one of Debian's many HTTP mirrors. A comprehensive list of mirrors is available at:


Miscellaneous Bugfixes

This stable update adds a few important corrections to the following packages:

Package Reason
avahi Remove avahi-daemon-check-dns mechanism, which is no longer needed
base-files Update /etc/debian_version for the 10.9 point release
cloud-init Avoid logging generated passwords to world-readable log files [CVE-2021-3429]
debian-archive-keyring Add bullseye keys; retire jessie keys
debian-installer Use 4.19.0-16 Linux kernel ABI
debian-installer-netboot-images Rebuild against proposed-updates
exim4 Fix use of concurrent TLS connections under GnuTLS; fix TLS certificate verification with CNAMEs; README.Debian: document the limitation/extent of server certificate verification in the default configuration
fetchmail No longer report System error during SSL_connect(): Success; remove OpenSSL version check
fwupd Add SBAT support
fwupd-amd64-signed Add SBAT support
fwupd-arm64-signed Add SBAT support
fwupd-armhf-signed Add SBAT support
fwupd-i386-signed Add SBAT support
fwupdate Add SBAT support
fwupdate-amd64-signed Add SBAT support
fwupdate-arm64-signed Add SBAT support
fwupdate-armhf-signed Add SBAT support
fwupdate-i386-signed Add SBAT support
gdnsd Fix stack overflow with overly-large IPv6 addresses [CVE-2019-13952]
groff Rebuild against ghostscript 9.27
hwloc-contrib Enable support for the ppc64el architecture
intel-microcode Update various microcode
iputils Fix ping rounding errors; fix tracepath target corruption
jquery Fix untrusted code execution vulnerabilities [CVE-2020-11022 CVE-2020-11023]
libbsd Fix out-of-bounds read issue [CVE-2019-20367]
libpano13 Fix format string vulnerability
libreoffice Do not load encodings.py from current directoy
linux New upstream stable release; update ABI to -16; rotate secure boot signing keys; rt: update to 4.19.173-rt72
linux-latest Update to -15 kernel ABI; update for -16 kernel ABI
linux-signed-amd64 New upstream stable release; update ABI to -16; rotate secure boot signing keys; rt: update to 4.19.173-rt72
linux-signed-arm64 New upstream stable release; update ABI to -16; rotate secure boot signing keys; rt: update to 4.19.173-rt72
linux-signed-i386 New upstream stable release; update ABI to -16; rotate secure boot signing keys; rt: update to 4.19.173-rt72
lirc Normalize embedded ${DEB_HOST_MULTIARCH} value in /etc/lirc/lirc_options.conf to find unmodified configuration files on all architectures; recommend gir1.2-vte-2.91 instead of non-existent gir1.2-vte
m2crypto Fix test failure with recent OpenSSL versions
openafs Fix outgoing connections after unix epoch time 0x60000000 (14 January 2021)
portaudio19 Handle EPIPE from alsa_snd_pcm_poll_descriptors, fixing crash
postgresql-11 New upstream stable release; fix information leakage in constraint-violation error messages [CVE-2021-3393]; fix CREATE INDEX CONCURRENTLY to wait for concurrent prepared transactions
privoxy Security issues [CVE-2020-35502 CVE-2021-20209 CVE-2021-20210 CVE-2021-20211 CVE-2021-20212 CVE-2021-20213 CVE-2021-20214 CVE-2021-20215 CVE-2021-20216 CVE-2021-20217 CVE-2021-20272 CVE-2021-20273 CVE-2021-20275 CVE-2021-20276]
python3.7 Fix CRLF injection in http.client [CVE-2020-26116]; fix buffer overflow in PyCArg_repr in _ctypes/callproc.c [CVE-2021-3177]
redis Fix a series of integer overflow issues on 32-bit systems [CVE-2021-21309]
ruby-mechanize Fix command injection issue [CVE-2021-21289]
systemd core: make sure to restore the control command id, too, fixing a segfault; seccomp: allow turning off of seccomp filtering via an environment variable
uim libuim-data: Perform symlink_to_dir conversion of /usr/share/doc/libuim-data in the resurrected package for clean upgrades from stretch
xcftools Fix integer overflow vulnerability [CVE-2019-5086 CVE-2019-5087]
xterm Correct upper-limit for selection buffer, accounting for combining characters [CVE-2021-27135]

Security Updates

This revision adds the following security updates to the stable release. The Security Team has already released an advisory for each of these updates:

Advisory ID Package
DSA-4826 nodejs
DSA-4844 dnsmasq
DSA-4845 openldap
DSA-4846 chromium
DSA-4847 connman
DSA-4849 firejail
DSA-4850 libzstd
DSA-4851 subversion
DSA-4853 spip
DSA-4854 webkit2gtk
DSA-4855 openssl
DSA-4856 php7.3
DSA-4857 bind9
DSA-4858 chromium
DSA-4859 libzstd
DSA-4860 openldap
DSA-4861 screen
DSA-4862 firefox-esr
DSA-4863 nodejs
DSA-4864 python-aiohttp
DSA-4865 docker.io
DSA-4867 grub-efi-amd64-signed
DSA-4867 grub-efi-arm64-signed
DSA-4867 grub-efi-ia32-signed
DSA-4867 grub2
DSA-4868 flatpak
DSA-4869 tiff
DSA-4870 pygments
DSA-4871 tor
DSA-4872 shibboleth-sp

Debian Installer

The installer has been updated to include the fixes incorporated into stable by the point release.


The complete lists of packages that have changed with this revision:


The current stable distribution:


Proposed updates to the stable distribution:


stable distribution information (release notes, errata etc.):


Security announcements and information:


About Debian

The Debian Project is an association of Free Software developers who volunteer their time and effort in order to produce the completely free operating system Debian.

Contact Information

For further information, please visit the Debian web pages at https://www.debian.org/, send mail to <press@debian.org>, or contact the stable release team at <debian-release@lists.debian.org>.