8.8
HIGH
CVE-2021-32762
Redis hiredis Library Integer Overflow Vulnerability
Description

Redis is an open source, in-memory database that persists on disk. The redis-cli command line tool and redis-sentinel service may be vulnerable to integer overflow when parsing specially crafted large multi-bulk network replies. This is a result of a vulnerability in the underlying hiredis library which does not perform an overflow check before calling the calloc() heap allocation function. This issue only impacts systems with heap allocators that do not perform their own overflow checks. Most modern systems do and are therefore not likely to be affected. Furthermore, by default redis-sentinel uses the jemalloc allocator which is also not vulnerable. The problem is fixed in Redis versions 6.2.6, 6.0.16 and 5.0.14.

INFO

Published Date :

Oct. 4, 2021, 6:15 p.m.

Last Modified :

Nov. 7, 2023, 3:35 a.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

2.8
Affected Products

The following products are affected by CVE-2021-32762 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 Netapp management_services_for_element_software
2 Netapp management_services_for_netapp_hci
1 Fedoraproject fedora
1 Debian debian_linux
1 Redis redis
1 Oracle communications_operations_monitor
: Total Affected Vendor : 5 | Products : 6
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-2021-32762.

URL Resource
https://github.com/redis/redis/commit/0215324a66af949be39b34be2d55143232c1cb71 Patch Third Party Advisory
https://github.com/redis/redis/security/advisories/GHSA-833w-8v3m-8wwr Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HTYQ5ZF37HNGTZWVNJD3VXP7I6MEEF42/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VL5KXFN3ATM7IIM7Q4O4PWTSRGZ5744Z/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WR5WKJWXD4D6S3DJCZ56V74ESLTDQRAB/
https://security.gentoo.org/glsa/202209-17 Third Party Advisory
https://security.netapp.com/advisory/ntap-20211104-0003/ Third Party Advisory
https://www.debian.org/security/2021/dsa-5001 Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html Patch 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).

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

The following list is the news that have been mention CVE-2021-32762 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-32762 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 [email protected]

    May. 14, 2024

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

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VL5KXFN3ATM7IIM7Q4O4PWTSRGZ5744Z/ [No types assigned]
    Added Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HTYQ5ZF37HNGTZWVNJD3VXP7I6MEEF42/ [No types assigned]
    Added Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WR5WKJWXD4D6S3DJCZ56V74ESLTDQRAB/ [No types assigned]
    Removed Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/VL5KXFN3ATM7IIM7Q4O4PWTSRGZ5744Z/
    Removed Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/HTYQ5ZF37HNGTZWVNJD3VXP7I6MEEF42/
    Removed Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/WR5WKJWXD4D6S3DJCZ56V74ESLTDQRAB/
  • Modified Analysis by [email protected]

    Oct. 06, 2022

    Action Type Old Value New Value
    Changed Reference Type https://security.gentoo.org/glsa/202209-17 No Types Assigned https://security.gentoo.org/glsa/202209-17 Third Party Advisory
  • CVE Modified by [email protected]

    Sep. 29, 2022

    Action Type Old Value New Value
    Added Reference https://security.gentoo.org/glsa/202209-17 [No Types Assigned]
  • Modified Analysis by [email protected]

    May. 13, 2022

    Action Type Old Value New Value
    Changed Reference Type https://www.oracle.com/security-alerts/cpuapr2022.html No Types Assigned https://www.oracle.com/security-alerts/cpuapr2022.html Patch, Third Party Advisory
    Removed CPE Configuration OR *cpe:2.3:a:netapp:management_services_for_element_software_and_netapp_hci:-:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:a:netapp:management_services_for_element_software:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:management_services_for_netapp_hci:-:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:a:oracle:communications_operations_monitor:4.3:*:*:*:*:*:*:* *cpe:2.3:a:oracle:communications_operations_monitor:4.4:*:*:*:*:*:*:* *cpe:2.3:a:oracle:communications_operations_monitor:5.0:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Apr. 20, 2022

    Action Type Old Value New Value
    Added Reference https://www.oracle.com/security-alerts/cpuapr2022.html [No Types Assigned]
  • Modified Analysis by [email protected]

    Nov. 28, 2021

    Action Type Old Value New Value
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/WR5WKJWXD4D6S3DJCZ56V74ESLTDQRAB/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/WR5WKJWXD4D6S3DJCZ56V74ESLTDQRAB/ 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
    Changed Reference Type https://www.debian.org/security/2021/dsa-5001 No Types Assigned https://www.debian.org/security/2021/dsa-5001 Third Party Advisory
    Changed CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
  • 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]
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/WR5WKJWXD4D6S3DJCZ56V74ESLTDQRAB/ [No Types Assigned]
    Added Reference https://www.debian.org/security/2021/dsa-5001 [No Types Assigned]
  • CVE Modified by [email protected]

    Nov. 10, 2021

    Action Type Old Value New Value
    Removed Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/WR5WKJWXD4D6S3DJCZ56V74ESLTDQRAB/ [Mailing List, Third Party Advisory]
    Removed Reference https://security.netapp.com/advisory/ntap-20211104-0003/ [Third Party Advisory]
    Removed Reference https://www.debian.org/security/2021/dsa-5001 [Third Party Advisory]
  • Modified Analysis by [email protected]

    Nov. 08, 2021

    Action Type Old Value New Value
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/WR5WKJWXD4D6S3DJCZ56V74ESLTDQRAB/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/WR5WKJWXD4D6S3DJCZ56V74ESLTDQRAB/ 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
    Changed Reference Type https://www.debian.org/security/2021/dsa-5001 No Types Assigned https://www.debian.org/security/2021/dsa-5001 Third Party Advisory
    Changed CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:a:netapp:management_services_for_element_software_and_netapp_hci:-:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Nov. 06, 2021

    Action Type Old Value New Value
    Added Reference https://www.debian.org/security/2021/dsa-5001 [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. 30, 2021

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/WR5WKJWXD4D6S3DJCZ56V74ESLTDQRAB/ [No Types Assigned]
  • Initial Analysis by [email protected]

    Oct. 13, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:C/I:C/A:C)
    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://github.com/redis/redis/commit/0215324a66af949be39b34be2d55143232c1cb71 No Types Assigned https://github.com/redis/redis/commit/0215324a66af949be39b34be2d55143232c1cb71 Patch, Third Party Advisory
    Changed Reference Type https://github.com/redis/redis/security/advisories/GHSA-833w-8v3m-8wwr No Types Assigned https://github.com/redis/redis/security/advisories/GHSA-833w-8v3m-8wwr Third Party Advisory
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/HTYQ5ZF37HNGTZWVNJD3VXP7I6MEEF42/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/HTYQ5ZF37HNGTZWVNJD3VXP7I6MEEF42/ Mailing List, Third Party Advisory
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/VL5KXFN3ATM7IIM7Q4O4PWTSRGZ5744Z/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/VL5KXFN3ATM7IIM7Q4O4PWTSRGZ5744Z/ Mailing List, Third Party Advisory
    Added CWE NIST CWE-190
    Added CPE Configuration OR *cpe:2.3:a:redis:redis:*:*:*:*:*:*:*:* versions from (including) 5.0.0 up to (excluding) 5.0.14 *cpe:2.3:a:redis:redis:*:*:*:*:*:*:*:* versions from (including) 6.0.0 up to (excluding) 6.0.16 *cpe:2.3:a:redis:redis:*:*:*:*:*:*:*:* versions from (including) 6.2.0 up to (excluding) 6.2.6
    Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Oct. 13, 2021

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/VL5KXFN3ATM7IIM7Q4O4PWTSRGZ5744Z/ [No Types Assigned]
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/HTYQ5ZF37HNGTZWVNJD3VXP7I6MEEF42/ [No Types Assigned]
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-2021-32762 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-2021-32762 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.

0.94 }} 0.28%

score

0.83160

percentile

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