Round Square Re: Automatic reply: "access denied" to non-root@localhost & null-string user in USER_PRIVILEGES
Dec 27, 2012; 05:34
Round Square
Re: Automatic reply: "access denied" to non-root@localhost & null-string user in USER_PRIVILEGES
On 12/26/2012 01:25 PM, Igor Shevtsov wrote: > You mysql.user table might be corrupted. > If you have access to it as a root user, try check table mysql.user, and repair table mysql.user if table corruption was detected. > Alternatively, shut down mysql server, cd /var/lib/mysql/mysql (to your $datadir/mysql directory) and run > mysqlcheck -r mysql user > >
I deleted the row with the empty user from mysql.user, then restarted the daemon, and all seems back to normal now.
One lingering question is: why did mysql allow this to happen? Could this be considered a bug? After all, an inadvertent and seemingly harmless insertion leads to authentication failure for all users.
Are there any other known similar gotchas? The fix for this one appears so trivial as to perhaps NOT call for a restore-from-backup. But there could be other similar glitches that might call for that?
Thanks!
> > > > > > On 26/12/12 18:00, Round Square wrote: >> Hi all: >> Suddenly, after a long, functioning run of the mysql server, all the non-root accounts went bad, with: >> >> Access denied for user 'non_root_user'@'localhost' (using password: YES) >> >> Authenticating with "non_root_user@server.ip.address" still works ( the bind-address in my.cnf is mapped to server.ip.address ) >> >> Poking around in puzzlement and comparing the current, broken state with the functioning state (from backup) I discovered that in the broken version there is this extra line in the information_schema.USER_PRIVILEGES table: >> >> | ''@'localhost' | NULL | USAGE | NO | >> >> (Note the null-string user prepended to "@localhost") >> >> Again: the functional, non-broken state does NOT have this entry. Thus, my current theory is that this line is the culprit. Prior to the failure I had a surge of experimental installations, installing third-party software that created mysql tables, and can't clearly retrace everything I did, at this point, to pinpoint the installation that may have caused it. >> >> Be that as it may... >> >> (1) Is my theory correct? >> (2) If that line should not be there... >> (a) How do I remove it, properly? I don't have debian-sys-maint privileges to delete the line. (Or do I?) >> (b) Are there other tables, besides USER_PRIVILEGES, that would need to be updated/purged >> >> My version: >> mysql Ver 14.14 Distrib 5.1.41, for debian-linux-gnu (i486) using readline 6.1 >> >> > >
-- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql
Jan 03
Shawn Green Re: Automatic reply: "access denied" to non-root@localhost & null-string user in USER_PRIVILEGES
Jan 03, 2013; 09:29
Shawn Green
Re: Automatic reply: "access denied" to non-root@localhost & null-string user in USER_PRIVILEGES
Search
Lasso Programming
This site manages and broadcasts several email lists pertaining to Lasso Programming and technologies related and used by Lasso developers. Sign up today!