Description of problem: the test for this CVE fails also with mysql-5.0.95-5.el5_9
It seems not much changed from 5.0 to 5.1, so back-porting a patch from 5.1 should work fine. Reproducer works: mysql> select astext(0x0100000000030000000100000000000010); ERROR 5 (HY000): Out of memory (Needed 4026531856 bytes)
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