Vulnerability Details CVE-2021-32765
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.005
EPSS Ranking 64.0%
CVSS Severity
CVSS v3 Score 8.8
CVSS v2 Score 6.5
References
- https://github.com/redis/hiredis/commit/76a7b10005c70babee357a7d0f2becf28ec7ed1e
- https://github.com/redis/hiredis/security/advisories/GHSA-hfm9-39pp-55p2
- https://lists.debian.org/debian-lts-announce/2021/10/msg00007.html
- https://security.gentoo.org/glsa/202210-32
- https://security.netapp.com/advisory/ntap-20211104-0003/
- https://wiki.sei.cmu.edu/confluence/display/c/MEM07-C.+Ensure+that+the+arguments+to+calloc%28%29%2C+when+multiplied%2C+do+not+wrap
- https://github.com/redis/hiredis/commit/76a7b10005c70babee357a7d0f2becf28ec7ed1e
- https://github.com/redis/hiredis/security/advisories/GHSA-hfm9-39pp-55p2
- https://lists.debian.org/debian-lts-announce/2021/10/msg00007.html
- https://security.gentoo.org/glsa/202210-32
- https://security.netapp.com/advisory/ntap-20211104-0003/
- https://wiki.sei.cmu.edu/confluence/display/c/MEM07-C.+Ensure+that+the+arguments+to+calloc%28%29%2C+when+multiplied%2C+do+not+wrap
Products affected by CVE-2021-32765
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cpe:2.3:a:netapp:management_services_for_element_software_and_netapp_hci:-
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cpe:2.3:a:redis:hiredis:0.0.1
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cpe:2.3:a:redis:hiredis:0.10.0
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cpe:2.3:a:redis:hiredis:0.10.1
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cpe:2.3:a:redis:hiredis:0.11.0
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cpe:2.3:a:redis:hiredis:0.12.0
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cpe:2.3:a:redis:hiredis:0.12.1
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cpe:2.3:a:redis:hiredis:0.13.0
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cpe:2.3:a:redis:hiredis:0.13.1
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cpe:2.3:a:redis:hiredis:0.13.2
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cpe:2.3:a:redis:hiredis:0.13.3
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cpe:2.3:a:redis:hiredis:0.14.0
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cpe:2.3:a:redis:hiredis:0.14.1
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cpe:2.3:a:redis:hiredis:0.9.0
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cpe:2.3:a:redis:hiredis:0.9.1
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cpe:2.3:a:redis:hiredis:0.9.2
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cpe:2.3:a:redis:hiredis:1.0.0
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cpe:2.3:o:debian:debian_linux:9.0