A denial of service flaw was found in the way MySQL processed joins queries, which involved a table with unique SET column. A remote MySQL user could use this flaw to cause mysqld daemon crash. References: [1] http://secunia.com/advisories/41048/ [2] http://dev.mysql.com/doc/refman/5.1/en/news-5-1-49.html Upstream bug report: [3] http://bugs.mysql.com/bug.php?id=54575 Note: This issue only causes a temporary denial of service, as the mysql daemon shipped with Red Hat Enterprise Linux 5 will be automatically restarted after the crash.
Public proof of concept (from [3]): drop table if exists `t1`,`t2`; create table `t1`(`a` set('a')not null,unique key (`a`))engine=myisam; create table `t2`(`b` int primary key)engine=innodb; insert into `t1` values (); insert into `t2` values (1); select 1 from `t2` join `t1` on 1 like `a` group by `a`;
This issue did NOT affect the versions of mysql package, as shipped with Red Hat Enterprise Linux 3 and 4. This issue affects the versions of mysql package, as shipped with Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this issue as having low security impact, as exploitation of this issue would mean only a temporary denial of service, since the mysql daemon shipped with Red Hat Enterprise Linux 5 will be automatically restarted after the crash. A future update may address this flaw in Red Hat Enterprise Linux 5. -- This issue affects the versions of mysql package, as shipped with Fedora release of 12 and 13.
CVE Request: http://www.openwall.com/lists/oss-security/2010/08/30/8
Created mysql tracking bugs for this issue Affects: fedora-all [bug 636780]
The CVE identifier of CVE-2010-3677 has been assigned to this issue.
This issue has been addressed in following products: Red Hat Enterprise Linux 5 Via RHSA-2010:0825 https://rhn.redhat.com/errata/RHSA-2010-0825.html
Statement: This issue did not affect the versions of mysql as shipped with Red Hat Enterprise Linux 3 and 4. This issue was addressed in Red Hat Enterprise Linux 5 via https://rhn.redhat.com/errata/RHSA-2010-0825.html.
This issue has been addressed in following products: Red Hat Enterprise Linux 6 Via RHSA-2011:0164 https://rhn.redhat.com/errata/RHSA-2011-0164.html