CVE-2021-32765
Integer Overflow to Buffer Overflow in Hiredis
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
Hiredis es una librería cliente minimalista en C para la base de datos Redis. En las versiones afectadas, Hiredis es vulnerable al desbordamiento de enteros si se proporcionan datos del protocolo "RESP" "multi-bulk" maliciosamente diseñados o corruptos. Cuando se analizan las respuestas "multi-bulk" (tipo array), hiredis no comprueba si "count * sizeof(redisReply*)" puede representarse en "SIZE_MAX". Si no puede, y la llamada a "calloc()" no hace por sí misma esta comprobación, se produciría una asignación corta y el consiguiente desbordamiento del búfer. Los usuarios de hiredis que no puedan actualizar pueden establecer la opción de contexto [maxelements](https://github.com/redis/hiredis#reader-max-array-elements) a un valor lo suficientemente pequeño como para que no sea posible el desbordamiento
CVSS Scores
SSVC
- Decision:-
Timeline
- 2021-05-12 CVE Reserved
- 2021-10-04 CVE Published
- 2024-08-03 CVE Updated
- 2024-10-21 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-190: Integer Overflow or Wraparound
- CWE-680: Integer Overflow to Buffer Overflow
CAPEC
References (6)
| URL | Tag | Source |
|---|---|---|
| https://github.com/redis/hiredis/security/advisories/GHSA-hfm9-39pp-55p2 | Mitigation | |
| https://lists.debian.org/debian-lts-announce/2021/10/msg00007.html | Mailing List |
|
| https://security.netapp.com/advisory/ntap-20211104-0003 | Third Party Advisory |
|
| 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 |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://github.com/redis/hiredis/commit/76a7b10005c70babee357a7d0f2becf28ec7ed1e | 2022-12-07 |
| URL | Date | SRC |
|---|---|---|
| https://security.gentoo.org/glsa/202210-32 | 2022-12-07 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Redis Search vendor "Redis" | Hiredis Search vendor "Redis" for product "Hiredis" | < 1.0.1 Search vendor "Redis" for product "Hiredis" and version " < 1.0.1" | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0" | - |
Affected
| ||||||
| Netapp Search vendor "Netapp" | Management Services For Element Software And Netapp Hci Search vendor "Netapp" for product "Management Services For Element Software And Netapp Hci" | - | - |
Affected
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