Common Vulnerabilities and Exposures assigned an identifier CVE-2012-1734 to
the following vulnerability:
Unspecified vulnerability in Oracle MySQL Server 5.1.62 and earlier,
and 5.5.23 and earlier, allows remote authenticated users to affect
availability via unknown vectors related to Server Optimizer.
Reviewing changes between 5.1.62 and 5.1.63, there are several fixes that are likely all hidden under this single CVE. All these were also fixed in 5.5 in between 5.5.23 and 5.5.24.
Bug#11766300 59387: FAILING ASSERTION: CURSOR->POS_STATE == 1997660512 (BTR_PCUR_IS_POSITIONE
Bug#13639204 64111: CRASH ON SELECT SUBQUERY WITH NON UNIQUE INDEX
This previously got CVE-2012-2749 assigned, but the assignment was ignored by upstream. The issue is tracked via bug #833737.
Bug#13031606 VALUES() IN A SELECT STATEMENT CRASHES SERVER
This problem is not reproducible on mysql packages in Red Hat Enterprise Linux 5.
Bug#13519724 63793: CRASH IN DTCOLLATION::SET(DTCOLLATION &SET)
This also affects 5.0 packages in Red Hat Enterprise Linux 5.
This issue has been addressed in following products:
Red Hat Enterprise Linux 6
Via RHSA-2012:1462 https://rhn.redhat.com/errata/RHSA-2012-1462.html