Re: Opinion on this, password changed, nothing suspicious in logs

2012-05-29 Thread Michael Stummvoll
Am Mon, 28 May 2012 15:49:40 +0200
schrieb Marko Randjelovic marko.m...@gmail.com:

 * I logged in my normal account on desktop PC last time successfuly
 saturday evening and turned off the computer 2 hours after midnight.
 * At Sunday morning I went for a walk.
 At 16 pm I turned on the computer but my password did not work.
 * I checked the logs and found no trace of intrusion, but also no
 entry about password change.
 
 I have Debian 6 desktop and firewall computers. I apply security
 pathes regulary, have active firewall and SELinux. The only problem I
 see could be the custom kernel 3.2 that is not completely patched.
 
 I have logged in several times successfuly with that password,
 including immidiately after power on when there is no possibility of
 alternative keyboard layout and no need to touch caps lock.
 
 For me it is obvious my account was compromised, but don't know if
 root privileges were acquired.
 
 What do you think?
 

if your computer was turned off in the meanwhile it couldn't get
compromised - except somebody with hardware-access turned it on. I
don't know how possible this is in your case. But if somebody is smart
enough to get hw-access to your computer and boot it with a live-system
he wouldn't be such a fool to betray his compromision by changing a
password. so I think its an software or configuration problem, or
something on layer 8 ;)

to change a password with user-rights you need the password of this
user, even he is logged in already

kind regards, 
Michael


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Re: Opinion on this, password changed, nothing suspicious in logs

2012-05-29 Thread Patrick Geschke
Agreed.
Except if there was a means of WOL the untruder was aware of.

Viele Grüße,
Patrick Geschke

Sent from the road.

Am 29.05.2012 um 13:08 schrieb Michael Stummvoll mich...@stummi.org:

 Am Mon, 28 May 2012 15:49:40 +0200
 schrieb Marko Randjelovic marko.m...@gmail.com:
 
 * I logged in my normal account on desktop PC last time successfuly
 saturday evening and turned off the computer 2 hours after midnight.
 * At Sunday morning I went for a walk.
 At 16 pm I turned on the computer but my password did not work.
 * I checked the logs and found no trace of intrusion, but also no
 entry about password change.
 
 I have Debian 6 desktop and firewall computers. I apply security
 pathes regulary, have active firewall and SELinux. The only problem I
 see could be the custom kernel 3.2 that is not completely patched.
 
 I have logged in several times successfuly with that password,
 including immidiately after power on when there is no possibility of
 alternative keyboard layout and no need to touch caps lock.
 
 For me it is obvious my account was compromised, but don't know if
 root privileges were acquired.
 
 What do you think?
 
 
 if your computer was turned off in the meanwhile it couldn't get
 compromised - except somebody with hardware-access turned it on. I
 don't know how possible this is in your case. But if somebody is smart
 enough to get hw-access to your computer and boot it with a live-system
 he wouldn't be such a fool to betray his compromision by changing a
 password. so I think its an software or configuration problem, or
 something on layer 8 ;)
 
 to change a password with user-rights you need the password of this
 user, even he is logged in already
 
 kind regards, 
 Michael
 
 
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Re: Opinion on this, password changed, nothing suspicious in logs

2012-05-29 Thread Povl Ole Haarlev Olsen

On Mon, 28 May 2012, Marko Randjelovic wrote:

At 16 pm I turned on the computer but my password did not work.
* I checked the logs and found no trace of intrusion, but also no entry 
about password change.
For me it is obvious my account was compromised, but don't know if root 
privileges were acquired.

What do you think?


Without any evidence of intrusion, I wouldn't be surprised if you got a 
flaky key on your keyboard. Are you sure you don't have a faulty 1 or 
something like that?


--
Povl Ole


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Re: Opinion on this, password changed, nothing suspicious in logs

2012-05-29 Thread Jordon Bedwell
On May 29, 2012 7:08 AM, Povl Ole Haarlev Olsen debian-secur...@stderr.dk
wrote:
 Without any evidence of intrusion, I wouldn't be surprised if
 you got a flaky key on your keyboard. Are you sure you don't
 have a faulty 1 or something like that?

This one has gotten me before. What can make it worse is if its almost like
mine where it turns out its not the keys directly but the reciever playing
games. Transmitting correctly one second and not the next.


Opinion on this, password changed, nothing suspicious in logs

2012-05-28 Thread Marko Randjelovic
* I logged in my normal account on desktop PC last time successfuly saturday 
evening and turned off the computer 2 hours after midnight.
* At Sunday morning I went for a walk.
At 16 pm I turned on the computer but my password did not work.
* I checked the logs and found no trace of intrusion, but also no entry about 
password change.

I have Debian 6 desktop and firewall computers. I apply security pathes 
regulary, have active firewall and SELinux. The only problem I see could be the 
custom kernel 3.2 that is not completely patched.

I have logged in several times successfuly with that password, including 
immidiately after power on when there is no possibility of alternative keyboard 
layout and no need to touch caps lock.

For me it is obvious my account was compromised, but don't know if root 
privileges were acquired.

What do you think?

-- 
Marko Ranđelović, B.Sc.
Software Developer
Niš, Serbia
marko...@eunet.rs
marko.m...@gmail.com
GnuPG Key: 11FF 0703 1C7A 8FB1 48C0  B63E 4D1C 0D3F 7281 F4B7


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