CVE-2008-2662 ruby: Integer overflows in rb_str_buf_append()

Multiple integer overflows in the rb_str_buf_append function in Ruby
1.8.4 and earlier, 1.8.5 before 1.8.5-p231, 1.8.6 before 1.8.6-p230,
1.8.7 before 1.8.7-p22, and 1.9.0 before 1.9.0-2 allow context-dependent
attackers to execute arbitrary code or cause a denial of service via
unknown vectors that trigger memory corruption, a different issue
than CVE-2008-2663, CVE-2008-2664, and CVE-2008-2725.

NOTE: As of 20080624, there has been inconsistent usage of multiple
CVE identifiers related to Ruby. This CVE description should be
regarded as authoritative, although it is likely to change.