... and allow dovecot to Px to it.
The profile is based on a profile I received in a bugreport, with the
actual script factored out. Note that you'll _need_ to add a rule to the
local/ include to allow executing the actual script, but since the
script to execute is configurable, it's basically impossible to add a
default rule for it.
References: https://bugzilla.opensuse.org/show_bug.cgi?id=1166007
As of [48755ebf](https://www.openhub.net/p/dnsmasq/commits/1679009518), dnsmasq iterates through directory entries in /proc/self/fd/ to find which file descriptors are open to avoid the potentially costly operation of closing all possible file descriptors.
While the current profile does not make dnsmasq inoperable, this change permits AppArmor users running dnsmasq to avoid falling back on the generic code path.
MR: https://gitlab.com/apparmor/apparmor/-/merge_requests/628
Acked-by: John Johansen <john.johansen@canonical.com>
New kernels provide an alternative proc attr interface for apparmor
which is needed for LSM stacking.
Update the remaining profiles that use the old interface to
include access to the new interface.
Signed-off-by: John Johansen <john.johansen@canonical.com>
As of [48755ebf], dnsmasq iterates through directory entries in
/proc/self/fd/ to find which file descriptors are open to avoid the
potentially costly operation of closing all possible file descriptors.
[48755ebf]: https://www.openhub.net/p/dnsmasq/commits/1679009518
LSM stacking adds new interfaces
/proc/<pid>/attr/apparmor/*
that should be used in preference of the old interface files in
/proc/<pid>/attr/*
The library has already been updated to use the new path but the
abstraction for change_profile has not so accessing the new interface
in a confined application fails.
Fix this by making the abstraction cover the old and new interfaces.
MR: https://gitlab.com/apparmor/apparmor/-/merge_requests/626
Signed-off-by: John Johansen <john.johansen@canonical.com>
- drop out dated maintenance comment
- cleanup profile name rules, and fix a few broken references
- /usr/lib -> /{usr,}/lib
- lib -> lib{,32,64}
MR: https://gitlab.com/apparmor/apparmor/-/merge_requests/611
Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Acked-by: Steve Beattie <steve.beattie@canonical.com>
Host files accessed by tcp_wrapper can reference other files, from man
5 hosts.allow
```
A string that begins with a '/' character is treated as a file name. A host name or address is matched if it matches any host name or address pattern listed in the named file. The file format is zero or more lines with zero or more host name or address patterns separated by whitespace. A file name pattern can be used anywhere a host name or address pattern can be used.
```
This means adding a file to hosts requires updating multiple profiles
Add a hosts abstraction so users only have to modify a single location.
MR: https://gitlab.com/apparmor/apparmor/-/merge_requests/605
Fixes: https://bugs.launchpad.net/ubuntu/+source/apparmor/+bug/1864466
Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Christian Boltz <apparmor@cboltz.de>
Ubuntu is dropping their chromium-browser profile because
chromium-browser has been made a snap on ubuntu. Suck in the profile
upstream as a reference profile for those who want to confine
chromium outside of a snap, and update its includes.
MR: https://gitlab.com/apparmor/apparmor/-/merge_requests/606
Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Steve Beattie <steve.beattie@canonical.com>
* fix profile name in signal and change_profile rule
* php-fpm profile: adjust /run paths
Thanks to Darix for pointing out that openSUSE now uses /run/php-fpm/
Also switch to using @{run}.
MR: https://gitlab.com/apparmor/apparmor/-/merge_requests/601
Acked-by: John Johansen <john.johansen@canonical.com>
Fix /usr/lib/postfix binary paths in postfix+dovecot profiles
See merge request apparmor/apparmor!602
Acked-by: Christian Boltz <apparmor@cboltz.de> for 2.12..master
Provide example rules in parser.conf to pin pre 3.0 policy and
appropriate abi files.
abis for vanilla upstream kernels and outoftree network patched
kernels are provided. With both ABIs dropping v8 support from
advertised by the kernel as 2.x policy/userspace did not support it.
MR: https://gitlab.com/apparmor/apparmor/-/merge_requests/598
Acked-by: Steve Beattie <steve.beattie@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Adapted from https://nordisch.org/posts/php-fpm-apparmor/, port the
nextcloud-independent portion of the php-fpm worker abstractions and
php-fpm isolation for more general usage.
Signed-off-by: Antonio Russo <antonio.e.russo@gmail.com>
The authentication, base and nameservice abstraction used /{usr/,}etc/
in several rules. Switch that to the more readable (and tunable)
@{etc_ro} variable.
Mikhail Morfikov has discovered [0] that some font packages in Debian
ships font files in /usr/bin/fonts-foo-bar (like
/usr/share/fonts-font-awesome/ for example). This produces denials for
GUI applications.
Update fonts abstraction to allow reading /usr/bin/fonts-* directories.
Also, refactor abstraction to aggregate two old rules into one.
Closes#94
[0] https://gitlab.com/apparmor/apparmor/-/issues/94
* allow reading my.cnf in dovecot-dict profile (seen with the mail users in a mysql database)
* allow /proc/\*/attr/current in dovecot imap and lmtp (needed when using the "apparmor" plugin which means dovecot switches to user-specific hats)
MR: https://gitlab.com/apparmor/apparmor/-/merge_requests/566
Acked-by: John Johansen <john.johansen@canonical.com>
Tag profiles and abstractions with abi information.
Tagging abstractions is not strictly necessary but allows the parser
to detect when their is a mismatch and that policy will need an
update for abi.
We do not currently tag the tunables because variable declarations
are not currently affected by abi.
MR: https://gitlab.com/apparmor/apparmor/-/merge_requests/491
Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Steve Beattie <sbeattie@ubuntu.com>
At least on Debian, when DNSSEC validation is enabled, dnsmasq needs to read
/usr/share/dnsmasq-base/trust-anchors.conf
Bug-Debian: https://bugs.debian.org/934869
LSM stacking adds the new /proc/<pid>/attr/apparmor directory
dedicated to apparmor so that it won't collide with other LSMs.
The library has already been switched to using this interface by
default, but the parser need to add permissions to access this
location when hats and/or change_profile rules are defined.
Also make sure to update the apache abstraction to support the new
interface as well.
Signed-off-by: John Johansen <john.johansen@canonical.com
Acked-by: Seth Arnold <seth.arnold@canonical.com>
In focal users of mdns get denials in apparmor confined applications.
An exampel can be found in the original bug below.
It seems it is a common pattern, see
https://github.com/lathiat/nss-mdns#etcmdnsallow
Therefore I'm asking to add
/etc/mdns.allow r,
to the file
/etc/apparmor.d/abstractions/mdns"
by default.
--- original bug ---
Many repetitions of
audit: type=1400 audit(1585517168.705:63): apparmor="DENIED" operation="open" profile="/usr/sbin/chronyd" name="/etc/mdns.allow" pid=1983815 comm="chronyd" requested_mask="r" denied_mask="r" fsuid=123 ouid=0
in log. I use libnss-mdns for .local name resolution, so /etc/nsswitch.conf contains
hosts: files mdns [NOTFOUND=return] myhostname dns
and /etc/mnds.allow contains the domains to resolve with mDNS (in may case, "local." and "local"; see /usr/share/doc/libnss-mdns/README.html.)
Presumably cronyd calls a gethostbyX() somewhere, thus eventually trickling down through the name service switch and opening /etc/mdns.allow, which the AppArmor profile in the chrony package does not allow.
Fixes: https://bugs.launchpad.net/ubuntu/+source/apparmor/+bug/1869629
Signed-off-by: John Johansen <john.johansen@canonical.com>
