CPANSA-Redis-Fast-2021-32765-hiredis: Redis-Fast vulnerability

Publisher giterlizzi Document category csaf_security_advisory
Initial release date 2021-10-04T00:00:00 Engine CSAF Perl Toolkit 0.25
Current release date 2021-10-04T00:00:00 Build Date
Current version 1 Status final
CVSS v3.1 Base Score 8.8 Severity High
Original language Language en
Also referred to

Vulnerability 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.

Vulnerabilities

CVE-2021-32765

Vulnerability 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.

Weakness CWE-190 : Integer Overflow or Wraparound

Product status

Known affected
Product Score
Redis-Fast greater than or equal 0.27 and less than or equal 0.31
CVSS Version CVSS Vector CVSS Base Score CVSS Base Severity
3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H 8.8 High
2.0 AV:N/AC:L/Au:S/C:P/I:P/A:P 6.5 Medium

giterlizzi

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gdt@cpan.org

References

Revision history

Version Date of the revision Summary of the revision
1 Mon Oct 4 00:00:00 2021 First release

Sharing rules

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