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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Redis | Hiredis | < 1.0.1 |
| Debian | Debian Linux | 9.0 |
| Netapp | Management Services For Element Software And Netapp Hci | - |
Related Weaknesses (CWE)
References
- https://github.com/redis/hiredis/commit/76a7b10005c70babee357a7d0f2becf28ec7ed1ePatchThird Party Advisory
- https://github.com/redis/hiredis/security/advisories/GHSA-hfm9-39pp-55p2MitigationThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/10/msg00007.htmlMailing ListThird Party Advisory
- https://security.gentoo.org/glsa/202210-32Third Party Advisory
- https://security.netapp.com/advisory/ntap-20211104-0003/Third Party Advisory
- https://wiki.sei.cmu.edu/confluence/display/c/MEM07-C.+Ensure+that+the+argumentsThird Party Advisory
- https://github.com/redis/hiredis/commit/76a7b10005c70babee357a7d0f2becf28ec7ed1ePatchThird Party Advisory
- https://github.com/redis/hiredis/security/advisories/GHSA-hfm9-39pp-55p2MitigationThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/10/msg00007.htmlMailing ListThird Party Advisory
- https://security.gentoo.org/glsa/202210-32Third Party Advisory
- https://security.netapp.com/advisory/ntap-20211104-0003/Third Party Advisory
- https://wiki.sei.cmu.edu/confluence/display/c/MEM07-C.+Ensure+that+the+argumentsThird Party Advisory
FAQ
What is CVE-2021-32765?
CVE-2021-32765 is a vulnerability with a CVSS score of 8.8 (HIGH). 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` protoc...
How severe is CVE-2021-32765?
CVE-2021-32765 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-32765?
Check the references section above for vendor advisories and patch information. Affected products include: Redis Hiredis, Debian Debian Linux, Netapp Management Services For Element Software And Netapp Hci.