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Hiredis before version 1.0.1 is vulnurable to integer overflow if provided maliciously crafted or corrupted RESP mult-bulk protocol data. |
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When parsing multi-bulk (array-like) replies, hiredis fails to check if count * sizeof(redisReply*) can be represented in SIZE_MAX. If it can not, and the calloc() call doesn't itself make this check, it would result in a short allocation and subsequent buffer overflow. |
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Users of hiredis who are unable to update may set the maxelements context option to a value small enough that no overflow is possible. |
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