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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.

Published

2021-10-04T21:15:12.527

Last Modified

2024-11-21T06:07:41.780

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 8.8 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:S/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: SINGLE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

8.0

Impact Score

6.4

Weaknesses

Type: Secondary
CWE-190
CWE-680
Type: Primary
CWE-190

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	redis	hiredis	< 1.0.1	Yes
Operating System	debian	debian_linux	9.0	Yes
Application	netapp	management_services_for_element_software_and_netapp_hci	-	Yes

References

https://github.com/redis/hiredis/commit/76a7b10005c70babee357a7d0f2becf28ec7ed1e Patch, Third Party Advisory ([email protected])
https://github.com/redis/hiredis/security/advisories/GHSA-hfm9-39pp-55p2 Mitigation, Third Party Advisory ([email protected])
https://lists.debian.org/debian-lts-announce/2021/10/msg00007.html Mailing List, Third Party Advisory ([email protected])
https://security.gentoo.org/glsa/202210-32 Third Party Advisory ([email protected])
https://security.netapp.com/advisory/ntap-20211104-0003/ Third Party Advisory ([email protected])
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 Third Party Advisory ([email protected])
https://github.com/redis/hiredis/commit/76a7b10005c70babee357a7d0f2becf28ec7ed1e Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/redis/hiredis/security/advisories/GHSA-hfm9-39pp-55p2 Mitigation, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2021/10/msg00007.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/202210-32 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20211104-0003/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
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 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)