Debconf executes scripts from /tmp by default but you can try continuing securing the system by changing apt's temp file configuration: https://serverfault.com/questions/72356/how-useful-is-mounting-tmp-noexec
Anyway this is definitely not a bug in u-u, maybe a wishlist one for debconf. ** Changed in: unattended-upgrades (Ubuntu) Importance: Low => Wishlist ** Package changed: unattended-upgrades (Ubuntu) => debconf (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to unattended-upgrades in Ubuntu. https://bugs.launchpad.net/bugs/1642863 Title: Upgrading unattended-upgrades gives errors and a warning Status in debconf package in Ubuntu: Confirmed Bug description: Ubuntu release ============== Description: Ubuntu 16.04.1 LTS Release: 16.04 Package version =============== unattended-upgrades: Installed: 0.90ubuntu0.2 Candidate: 0.90ubuntu0.2 Version table: *** 0.90ubuntu0.2 500 500 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages 500 http://archive.ubuntu.com/ubuntu xenial-updates/main i386 Packages 100 /var/lib/dpkg/status 0.90 500 500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages 500 http://archive.ubuntu.com/ubuntu xenial/main i386 Packages What I expected to happen ========================= No error or warning messages during a software upgrade. What happened instead ===================== When an updated version of unattended-upgrades is installed, the following error messages appear because /tmp is mounted noexec for security reasons (see the Securing Debian Manual, section 4.10 at https://www.debian.org/doc/manuals/securing-debian- howto/ch4.en.html#s4.10): Preconfiguring packages ... Can't exec "/tmp/unattended-upgrades.config.5svL0F": Permission denied at /usr/share/perl/5.22/IPC/Open3.pm line 178. open2: exec of /tmp/unattended-upgrades.config.5svL0F configure 0.90ubuntu0.1 failed at /usr/share/perl5/Debconf/ConfModule.pm line 59. Also, the following warning occurs later on: Setting up unattended-upgrades (0.90ubuntu0.2) ... update-rc.d: warning: start and stop actions are no longer supported; falling back to defaults ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: unattended-upgrades 0.90ubuntu0.2 ProcVersionSignature: Ubuntu 4.4.0-47.68-generic 4.4.24 Uname: Linux 4.4.0-47-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 CurrentDesktop: Unity Date: Fri Nov 18 02:36:54 2016 DistributionChannelDescriptor: # This is a distribution channel descriptor # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor canonical-oem-somerville-xenial-amd64-20160624-2 EcryptfsInUse: Yes InstallationDate: Installed on 2016-11-01 (17 days ago) InstallationMedia: Ubuntu 16.04 "Xenial" - Build amd64 LIVE Binary 20160624-10:47 PackageArchitecture: all SourcePackage: unattended-upgrades UpgradeStatus: No upgrade log present (probably fresh install) modified.conffile..etc.apt.apt.conf.d.10periodic: APT::Periodic::Update-Package-Lists "0"; APT::Periodic::Download-Upgradeable-Packages "0"; APT::Periodic::AutocleanInterval "0"; APT::Periodic::Unattended-Upgrade "1"; mtime.conffile..etc.apt.apt.conf.d.10periodic: 2016-11-07T13:58:08.805628 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/debconf/+bug/1642863/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
