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The chunksplit function in string.c in PHP 5.2.3 does not properly calculate the needed buffer size due to precision loss when performing integer arithmetic with floating point numbers, which has unknown attack vectors and impact, possibly resulting in a heap-based buffer overflow. NOTE: this is...

php chunk_split integer overflow

Multiple integer overflows in the chunksplit function in PHP 5 before 5.2.3 and PHP 4 before 4.4.8 allow remote attackers to cause a denial of service crash or execute arbitrary code via the 1 chunks, 2 srclen, and 3 chunklen arguments...