8.8
HIGH
CVE-2021-32765
Hiredis Integer Overflow Buffer Overflow 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.

INFO

Published Date :

Oct. 4, 2021, 9:15 p.m.

Last Modified :

Nov. 21, 2024, 6:07 a.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

2.8
Public PoC/Exploit Available at Github

CVE-2021-32765 has a 4 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2021-32765 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Debian debian_linux
1 Netapp management_services_for_element_software_and_netapp_hci
1 Redis hiredis
: Total Affected Vendor : 3 | Products : 3
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-32765.

URL Resource
https://github.com/redis/hiredis/commit/76a7b10005c70babee357a7d0f2becf28ec7ed1e Patch Third Party Advisory
https://github.com/redis/hiredis/security/advisories/GHSA-hfm9-39pp-55p2 Mitigation Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/10/msg00007.html Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202210-32 Third 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+arguments+to+calloc%28%29%2C+when+multiplied%2C+do+not+wrap Third Party Advisory
https://github.com/redis/hiredis/commit/76a7b10005c70babee357a7d0f2becf28ec7ed1e Patch Third Party Advisory
https://github.com/redis/hiredis/security/advisories/GHSA-hfm9-39pp-55p2 Mitigation Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/10/msg00007.html Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202210-32 Third 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+arguments+to+calloc%28%29%2C+when+multiplied%2C+do+not+wrap Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
terrablue/hirediz

None

CMake Makefile C C++ Zig Shell

Updated: 8 months, 4 weeks ago
0 stars 0 fork 0 watcher
Born at : March 24, 2024, 12:05 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
deepin-community/hiredis

None

Makefile C C++ CMake Shell

Updated: 3 months, 3 weeks ago
0 stars 1 fork 1 watcher
Born at : Oct. 8, 2022, 7:56 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
wl-ttg/test1

None

CMake C C++ Makefile HiveQL Shell

Updated: 2 years, 4 months ago
0 stars 0 fork 0 watcher
Born at : July 22, 2022, 1:35 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
redis/hiredis

Minimalistic C client for Redis >= 1.2

C Makefile C++ CMake Shell

Updated: 2 weeks, 3 days ago
6277 stars 1749 fork 1749 watcher
Born at : May 18, 2010, 3:10 p.m. This repo has been linked 1 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-32765 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-32765 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://github.com/redis/hiredis/commit/76a7b10005c70babee357a7d0f2becf28ec7ed1e
    Added Reference https://github.com/redis/hiredis/security/advisories/GHSA-hfm9-39pp-55p2
    Added Reference https://lists.debian.org/debian-lts-announce/2021/10/msg00007.html
    Added Reference https://security.gentoo.org/glsa/202210-32
    Added Reference https://security.netapp.com/advisory/ntap-20211104-0003/
    Added Reference 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
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Modified Analysis by [email protected]

    Dec. 07, 2022

    Action Type Old Value New Value
    Changed Reference Type https://security.gentoo.org/glsa/202210-32 No Types Assigned https://security.gentoo.org/glsa/202210-32 Third Party Advisory
  • CVE Modified by [email protected]

    Oct. 31, 2022

    Action Type Old Value New Value
    Added Reference https://security.gentoo.org/glsa/202210-32 [No Types Assigned]
  • Modified Analysis by [email protected]

    Nov. 28, 2021

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://lists.debian.org/debian-lts-announce/2021/10/msg00007.html No Types Assigned https://lists.debian.org/debian-lts-announce/2021/10/msg00007.html Mailing List, Third Party Advisory
    Changed Reference Type https://security.netapp.com/advisory/ntap-20211104-0003/ No Types Assigned https://security.netapp.com/advisory/ntap-20211104-0003/ Third Party Advisory
    Added CWE NIST CWE-190
    Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:a:netapp:management_services_for_element_software_and_netapp_hci:-:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Nov. 17, 2021

    Action Type Old Value New Value
    Added Reference https://security.netapp.com/advisory/ntap-20211104-0003/ [No Types Assigned]
  • CVE Modified by [email protected]

    Nov. 10, 2021

    Action Type Old Value New Value
    Removed Reference https://security.netapp.com/advisory/ntap-20211104-0003/ [No Types Assigned]
  • CVE Modified by [email protected]

    Nov. 04, 2021

    Action Type Old Value New Value
    Added Reference https://security.netapp.com/advisory/ntap-20211104-0003/ [No Types Assigned]
  • CVE Modified by [email protected]

    Oct. 12, 2021

    Action Type Old Value New Value
    Added Reference https://lists.debian.org/debian-lts-announce/2021/10/msg00007.html [No Types Assigned]
  • Initial Analysis by [email protected]

    Oct. 07, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:P/I:P/A:P)
    Changed Reference Type https://github.com/redis/hiredis/commit/76a7b10005c70babee357a7d0f2becf28ec7ed1e No Types Assigned https://github.com/redis/hiredis/commit/76a7b10005c70babee357a7d0f2becf28ec7ed1e Patch, Third Party Advisory
    Changed Reference Type https://github.com/redis/hiredis/security/advisories/GHSA-hfm9-39pp-55p2 No Types Assigned https://github.com/redis/hiredis/security/advisories/GHSA-hfm9-39pp-55p2 Mitigation, Third Party Advisory
    Changed Reference Type 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 No Types Assigned 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
    Added CPE Configuration OR *cpe:2.3:a:redis:hiredis:*:*:*:*:*:*:*:* versions up to (excluding) 1.0.1
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-32765 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-32765 weaknesses.

CAPEC-92: Forced Integer Overflow Forced Integer Overflow CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion CAPEC-67: String Format Overflow in syslog() String Format Overflow in syslog() CAPEC-92: Forced Integer Overflow Forced Integer Overflow CAPEC-100: Overflow Buffers Overflow Buffers
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.29 }} -3.32%

score

0.68741

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: