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>
Merge branch 'antnesterov/apparmor-fix-dhclient-profile'
@smb: converted read permission to /etc/openssl.cnf to use the openssl
abstraction instead.
Signed-off-by: Steve Beattie <steve.beattie@canonical.com>
PR: https://gitlab.com/apparmor/apparmor/-/merge_requests/570
This fixes lots of warnings like
```
*** Checking abstractions from ./apparmor.d/abstractions against apparmor_parser
Warning from stdin (stdin line 1): ../parser/apparmor_parser: File 'stdin' missing feature abi, falling back to default policy feature abi
Warning from stdin ([...]/profiles/./apparmor.d/abstractions/apparmor_api/change_profile line 9): ../parser/apparmor_parser: [...]/profiles/./apparmor.d/abstractions/apparmor_api/change_profile features abi 'abi/3.0' differes from policy declared feature abi, using the features abi declared in policy
```
MR: https://gitlab.com/apparmor/apparmor/-/merge_requests/554
Acked-by: John Johansen <john.johansen@canonical.com>
This fixes lots of warnings like
```
*** Checking abstractions from ./apparmor.d/abstractions against apparmor_parser
Warning from stdin (stdin line 1): ../parser/apparmor_parser: File 'stdin' missing feature abi, falling back to default policy feature abi
Warning from stdin ([...]/profiles/./apparmor.d/abstractions/apparmor_api/change_profile line 9): ../parser/apparmor_parser: [...]/profiles/./apparmor.d/abstractions/apparmor_api/change_profile features abi 'abi/3.0' differes from policy declared feature abi, using the features abi declared in policy
```
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
Move suggested bug reporting from launchpad to gitlab
Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Steve Beattie <steve.beattie@canonical.com>
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>
On systems with systemd 245, nss-systemd additionally queries NSS records from systemd-userdbd.service. See https://systemd.io/USER_GROUP_API/ .
Signed-off-by: nl6720 <nl6720@gmail.com>
Another instance of using libvirt_leaseshelper without having
libexec access. As addressed in the previous patch.
issue: https://gitlab.com/apparmor/apparmor/-/issues/87
Signed-off-by: John Johansen <john.johansen@canonical.com>
The error:
type=AVC msg=audit(1585403559.846:34317577): apparmor="DENIED" operation="exec" profile="/usr/sbin/dnsmasq" name="/usr/libexec/libvirt_leaseshelper" pid=7162 comm="sh" requested_mas
k="x" denied_mask="x" fsuid=0 ouid=0
type=AVC msg=audit(1585403559.846:34317578): apparmor="DENIED" operation="open" profile="/usr/sbin/dnsmasq" name="/usr/libexec/libvirt_leaseshelper" pid=7162 comm="sh" requested_mas
k="r" denied_mask="r" fsuid=0 ouid=0
Looks like the path to libvirt_leasehelper is incorrect usr.sbin.dnsmasq, at least in gentoo. Patching the file fixes the problem:
issue: https://gitlab.com/apparmor/apparmor/-/issues/87
Signed-off-by: John Johansen <john.johansen@canonical.com>
adjust abstractions/base and nameservice for /usr/etc/ move
See merge request apparmor/apparmor!447
Acked-by: John Johansen <john.johansen@canonical.com> for 2.12..master
Implement set of abstractions to handle opening uris via xdg-open and similar helpers used on different desktop environments.
Abstractions are intended to be included into child profile, together with bundle abstractions such as ubuntu-browsers, ubuntu-email and others, for fine-grained control on what confined application can actually open via xdg-open and similar helpers.
PR: https://gitlab.com/apparmor/apparmor/-/merge_requests/404
Acked-by: John Johansen <john.johansen@canonical.com>
