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FreeBSD: VID-2220827B-C732-11EC-B272-901B0E934D69 (CVE-2021-32765): hiredis -- integer/buffer overflow

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FreeBSD: VID-2220827B-C732-11EC-B272-901B0E934D69 (CVE-2021-32765): hiredis -- integer/buffer overflow

Severity
7
CVSS
(AV:N/AC:L/Au:S/C:P/I:P/A:P)
Published
10/04/2021
Created
11/08/2022
Added
11/04/2022
Modified
11/04/2022

Description

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.

Solution(s)

  • freebsd-upgrade-package-hiredis

References

  • CVE-2021-32765

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