CVE-2021-32765

CVE-2021-32765 · Integer Overflow to Buffer Overflow in Hiredis

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Hiredis is a minimalistic C client library for the Redis database. In affected versions Hiredis is vulnurable to integer overflow if provided maliciously crafted or corrupted `RESP` `mult-bulk` protocol data. 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. Users of hiredis who are unable to update may set the [maxelements](https://github.com/redis/hiredis#reader-max-array-elements) context option to a value small enough that no overflow is possible.

CVSS 8.8 · Hoch · EPSS 2,1% · Korrektur verfügbar

Veröffentlicht

2021-10-04T00:00:00.000Z

Aktualisiert

2024-08-03T23:33:55.893Z

Technologie-Stack: system

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