Public bug reported:
Every time I open firefox apparmor-notify displays a deny of "m" message
to "/dev/zero". I added the line "/dev/zero m," to my
/etc/apparmor.d/usr.bin.firefox profile to be able to play Adobe Flash
videos. Question #1: What security risks play a role when I allow "m"
(?) access to this folder for Firefox?
Now every time I start Firefox apparmor-notify displays a deny of “rw” (read
and write) to “/dev/nvidiactl”. Despite this I get messages no matter what web
page I'm on after exactly every minute that look something like this, from my
“/var/log/kern.log” LogFile,
“
type=AVC msg=audit(1332717987.622:214): apparmor="DENIED" operation="open"
parent=1 profile="/usr/lib/firefox-11.0/firefox{,*[^s][^h]}"
name="/proc/2011/net/dev" pid=2030 comm="firefox" requested_mask="r"
denied_mask="r" fsuid=1000 ouid=0
type=AVC msg=audit(1332718047.625:215): apparmor="DENIED" operation="open"
parent=1 profile="/usr/lib/firefox-11.0/firefox{,*[^s][^h]}"
name="/proc/2011/net/dev" pid=2030 comm="firefox" requested_mask="r"
denied_mask="r" fsuid=1000 ouid=0
type=AVC msg=audit(1332718107.625:216): apparmor="DENIED" operation="open"
parent=1 profile="/usr/lib/firefox-11.0/firefox{,*[^s][^h]}"
name="/proc/2011/net/dev" pid=2030 comm="firefox" requested_mask="r"
denied_mask="r" fsuid=1000 ouid=0
type=AVC msg=audit(1332718167.624:217): apparmor="DENIED" operation="open"
parent=1 profile="/usr/lib/firefox-11.0/firefox{,*[^s][^h]}"
name="/proc/2011/net/dev" pid=2030 comm="firefox" requested_mask="r"
denied_mask="r" fsuid=1000 ouid=0
“
After every restart of Firefox the proc folder changes in the message logs.
Question #2: Will these access denied messages go away if I again edit my
/etc/apparmor.d/usr.bin.firefox profile, but this time to add the permissive
line, “/dev/nvidiactl rw,”? Question #3: Either way, is it okay to do so (i.e.
add /dev/nvidiactl rw, to the Firefox profile)? And what are the security risks
for that?
Here are my specs,
"
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=11.10
DISTRIB_CODENAME=oneiric
DISTRIB_DESCRIPTION="Ubuntu 11.10"
Linux username 3.0.0-16-generic #29-Ubuntu SMP Tue Feb 14 12:49:42 UTC 2012
i686 athlon i386 GNU/Linux
firefox:
Installed: 11.0+build1-0ubuntu0.11.10.1
Candidate: 11.0+build1-0ubuntu0.11.10.1
Version table:
*** 11.0+build1-0ubuntu0.11.10.1 0
500 http://us.archive.ubuntu.com/ubuntu/ oneiric-updates/main i386
Packages
500 http://security.ubuntu.com/ubuntu/ oneiric-security/main i386
Packages
100 /var/lib/dpkg/status
7.0.1+build1+nobinonly-0ubuntu2 0
500 http://us.archive.ubuntu.com/ubuntu/ oneiric/main i386 Packages
"
Thank you.
** Affects: apparmor (Ubuntu)
Importance: Undecided
Status: New
** Tags: aa-notify adobe apparmor firefox flash play proc video videos
** Description changed:
Every time I open firefox apparmor-notify displays a deny of "m" message
to "/dev/zero". I added the line "/dev/zero m," to my
/etc/apparmor.d/usr.bin.firefox profile to be able to play Adobe Flash
videos. Question #1: What security risks play a role when I allow "m"
(?) access to this folder for Firefox?
Now every time I start Firefox apparmor-notify displays a deny of “rw” (read
and write) to “/dev/nvidiactl”. Despite this I get messages no matter what web
page I'm on after exactly every minute that look something like this, from my
“/var/log/kern.log” LogFile,
“
type=AVC msg=audit(1332717987.622:214): apparmor="DENIED" operation="open"
parent=1 profile="/usr/lib/firefox-11.0/firefox{,*[^s][^h]}"
name="/proc/2011/net/dev" pid=2030 comm="firefox" requested_mask="r"
denied_mask="r" fsuid=1000 ouid=0
type=AVC msg=audit(1332718047.625:215): apparmor="DENIED" operation="open"
parent=1 profile="/usr/lib/firefox-11.0/firefox{,*[^s][^h]}"
name="/proc/2011/net/dev" pid=2030 comm="firefox" requested_mask="r"
denied_mask="r" fsuid=1000 ouid=0
type=AVC msg=audit(1332718107.625:216): apparmor="DENIED" operation="open"
parent=1 profile="/usr/lib/firefox-11.0/firefox{,*[^s][^h]}"
name="/proc/2011/net/dev" pid=2030 comm="firefox" requested_mask="r"
denied_mask="r" fsuid=1000 ouid=0
type=AVC msg=audit(1332718167.624:217): apparmor="DENIED" operation="open"
parent=1 profile="/usr/lib/firefox-11.0/firefox{,*[^s][^h]}"
name="/proc/2011/net/dev" pid=2030 comm="firefox" requested_mask="r"
denied_mask="r" fsuid=1000 ouid=0
“
After every restart of Firefox the proc folder changes in the message logs.
Question #2: Will these access denied messages go away if I again edit my
/etc/apparmor.d/usr.bin.firefox profile, but this time to add the permissive
line, “/dev/nvidiactl rw,”? Question #3: Either way, is it okay to do so (i.e.
add /dev/nvidiactl rw, to the Firefox profile)? And what are the security risks
for that?
- Question #3: Do I need to change this to a bug report as suggested in
- the aa-notify messages' link to
- https://wiki.ubuntu.com/DebuggingApparmor?
-
Thank you.
** Tags added: apparmor
** Description changed:
Every time I open firefox apparmor-notify displays a deny of "m" message
to "/dev/zero". I added the line "/dev/zero m," to my
/etc/apparmor.d/usr.bin.firefox profile to be able to play Adobe Flash
videos. Question #1: What security risks play a role when I allow "m"
(?) access to this folder for Firefox?
Now every time I start Firefox apparmor-notify displays a deny of “rw” (read
and write) to “/dev/nvidiactl”. Despite this I get messages no matter what web
page I'm on after exactly every minute that look something like this, from my
“/var/log/kern.log” LogFile,
“
type=AVC msg=audit(1332717987.622:214): apparmor="DENIED" operation="open"
parent=1 profile="/usr/lib/firefox-11.0/firefox{,*[^s][^h]}"
name="/proc/2011/net/dev" pid=2030 comm="firefox" requested_mask="r"
denied_mask="r" fsuid=1000 ouid=0
type=AVC msg=audit(1332718047.625:215): apparmor="DENIED" operation="open"
parent=1 profile="/usr/lib/firefox-11.0/firefox{,*[^s][^h]}"
name="/proc/2011/net/dev" pid=2030 comm="firefox" requested_mask="r"
denied_mask="r" fsuid=1000 ouid=0
type=AVC msg=audit(1332718107.625:216): apparmor="DENIED" operation="open"
parent=1 profile="/usr/lib/firefox-11.0/firefox{,*[^s][^h]}"
name="/proc/2011/net/dev" pid=2030 comm="firefox" requested_mask="r"
denied_mask="r" fsuid=1000 ouid=0
type=AVC msg=audit(1332718167.624:217): apparmor="DENIED" operation="open"
parent=1 profile="/usr/lib/firefox-11.0/firefox{,*[^s][^h]}"
name="/proc/2011/net/dev" pid=2030 comm="firefox" requested_mask="r"
denied_mask="r" fsuid=1000 ouid=0
“
After every restart of Firefox the proc folder changes in the message logs.
Question #2: Will these access denied messages go away if I again edit my
/etc/apparmor.d/usr.bin.firefox profile, but this time to add the permissive
line, “/dev/nvidiactl rw,”? Question #3: Either way, is it okay to do so (i.e.
add /dev/nvidiactl rw, to the Firefox profile)? And what are the security risks
for that?
+ Here are my specs,
+ "
+ DISTRIB_ID=Ubuntu
+ DISTRIB_RELEASE=11.10
+ DISTRIB_CODENAME=oneiric
+ DISTRIB_DESCRIPTION="Ubuntu 11.10"
+ Linux username 3.0.0-16-generic #29-Ubuntu SMP Tue Feb 14 12:49:42 UTC 2012
i686 athlon i386 GNU/Linux
+ firefox:
+ Installed: 11.0+build1-0ubuntu0.11.10.1
+ Candidate: 11.0+build1-0ubuntu0.11.10.1
+ Version table:
+ *** 11.0+build1-0ubuntu0.11.10.1 0
+ 500 http://us.archive.ubuntu.com/ubuntu/ oneiric-updates/main i386
Packages
+ 500 http://security.ubuntu.com/ubuntu/ oneiric-security/main i386
Packages
+ 100 /var/lib/dpkg/status
+ 7.0.1+build1+nobinonly-0ubuntu2 0
+ 500 http://us.archive.ubuntu.com/ubuntu/ oneiric/main i386 Packages
+ "
+
Thank you.
** Tags added: aa-notify adobe firefox flash play proc video videos
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https://bugs.launchpad.net/bugs/965718
Title:
Denied to "/dev/zero/ m," and "/dev/nvidiactl rw,"
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