root password prompts
Mike McCarty
Mike.McCarty at sbcglobal.net
Thu May 27 09:29:38 UTC 2010
Mike McCarty wrote:
[...]
> $ sudo ls -l /var/run/sudo/jmccarty
> total 8
> -rw------- 1 root root 0 May 14 12:47 13
> -rw------- 1 root root 0 Apr 23 03:23 18
> -rw------- 1 root root 0 May 21 16:03 24
> -rw------- 1 root root 0 May 26 15:07 33
> -rw------- 1 root root 0 May 27 02:55 36
> -rw------- 1 root root 0 May 26 15:16 37
>
> Note carefully that the files are ZERO length; these
> contain no information, only the directory entry
> is significant, AFAIK. I have, on occasion, seen files
One slight clarification: The epoch the file timestamp
is set to is that of when sudo is run. When one uses
$ sudo -k
the timestamp is set to an epoch in the past. For example
from another (su to root) terminal I now see
# ls -l /var/run/sudo/jmccarty
total 8
-rw------- 1 root root 0 May 14 12:47 13
-rw------- 1 root root 0 Apr 23 03:23 18
-rw------- 1 root root 0 May 21 16:03 24
-rw------- 1 root root 0 May 27 03:15 33
-rw------- 1 root root 55 May 25 16:47 34:root
-rw------- 1 root root 0 Dec 31 1969 36
-rw------- 1 root root 0 May 26 15:16 37
-rw------- 1 root root 60 May 25 13:12 unknown:root
Interestingly, I now see entries with some data in them.
I've wondered whether those entries might not be from
something like that.
$ sudo dumphex /var/run/sudo/jmccarty/34:root
Password:
00000000 2F 76 61 72 2F 72 75 6E 2F 73 75 64 6F 2F 6A 6D
|/var/run/sudo/jm|
00000010 63 63 61 72 74 79 2F 33 34 3A 72 6F 6F 74 00 73
|ccarty/34:root.s|
00000020 45 FC 4B C0 23 47 DC EA 6A C5 6E 44 D8 85 2A 44
|E.K.#G..j.nD..*D|
00000030 18 C3 20 0D EC 74 9E |.. ..t.|
I don't know what that information may represent, but I suspect
it's the entries that su makes to track its information.
Mike
--
p="p=%c%s%c;main(){printf(p,34,p,34);}";main(){printf(p,34,p,34);}
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