9.8
CRITICAL
CVE-2021-33574
glibc SigEvent Use-after-Free Vulnerability
Description

The mq_notify function in the GNU C Library (aka glibc) versions 2.32 and 2.33 has a use-after-free. It may use the notification thread attributes object (passed through its struct sigevent parameter) after it has been freed by the caller, leading to a denial of service (application crash) or possibly unspecified other impact.

INFO

Published Date :

May 25, 2021, 10:15 p.m.

Last Modified :

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

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

3.9
Public PoC/Exploit Available at Github

CVE-2021-33574 has a 9 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-2021-33574 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 solidfire_baseboard_management_controller_firmware
2 Netapp cloud_backup
3 Netapp e-series_santricity_os_controller
4 Netapp h300s_firmware
5 Netapp h500s_firmware
6 Netapp h700s_firmware
7 Netapp h410s_firmware
8 Netapp h300e_firmware
9 Netapp h500e_firmware
10 Netapp h700e_firmware
1 Fedoraproject fedora
1 Debian debian_linux
1 Gnu glibc
: Total Affected Vendor : 4 | Products : 13
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-2021-33574.

URL Resource
https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KJYYIMDDYOHTP2PORLABTOHYQYYREZDD/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RBUUWUGXVILQXVWEOU7N42ICHPJNAEUP/
https://security.gentoo.org/glsa/202107-07 Third Party Advisory
https://security.netapp.com/advisory/ntap-20210629-0005/ Third Party Advisory
https://sourceware.org/bugzilla/show_bug.cgi?id=27896 Exploit Issue Tracking Third Party Advisory
https://sourceware.org/bugzilla/show_bug.cgi?id=27896#c1 Issue Tracking

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
actions-marketplace-validations/Azure_publish-security-assessments

None

TypeScript JavaScript

Updated: 1 year, 11 months ago
0 stars 0 fork 0 watcher
Born at : Nov. 28, 2022, 3:23 p.m. This repo has been linked 6 different CVEs too.
Profile Photo
oracle-japan/ochacafe-s5-3

None

Shell Dockerfile Go

Updated: 2 years, 8 months ago
0 stars 0 fork 0 watcher
Born at : Jan. 18, 2022, 7:29 a.m. This repo has been linked 4 different CVEs too.
Profile Photo
kenlavbah/log4jnotes

None

Updated: 2 years, 11 months ago
0 stars 0 fork 0 watcher
Born at : Dec. 16, 2021, 8:16 p.m. This repo has been linked 24 different CVEs too.
Profile Photo
nedenwalker/spring-boot-app-using-gradle

None

Java

Updated: 2 years, 11 months ago
0 stars 1 fork 1 watcher
Born at : Dec. 14, 2021, 4:38 p.m. This repo has been linked 26 different CVEs too.
Profile Photo
nedenwalker/spring-boot-app-with-log4j-vuln

None

Java

Updated: 2 years, 11 months ago
0 stars 0 fork 0 watcher
Born at : Dec. 13, 2021, 7 p.m. This repo has been linked 26 different CVEs too.
Profile Photo
dispera/giant-squid

Random late night exercises

Dockerfile Shell Python HCL

Updated: 2 years, 11 months ago
0 stars 0 fork 0 watcher
Born at : Nov. 17, 2021, 11:43 a.m. This repo has been linked 23 different CVEs too.
Profile Photo
ruzickap/cks-notes

CKS Notes

Updated: 5 months, 1 week ago
2 stars 1 fork 1 watcher
Born at : Oct. 9, 2021, 7:33 a.m. This repo has been linked 2 different CVEs too.
Profile Photo
madchap/opa-tests

None

Open Policy Agent

Updated: 3 years, 2 months ago
0 stars 0 fork 0 watcher
Born at : Sept. 12, 2021, 8:50 p.m. This repo has been linked 3 different CVEs too.
Profile Photo
Azure/publish-security-assessments

This action can be used to publish security scans done as part of CI/CD on Github to Azure Security Center.

JavaScript TypeScript

Updated: 1 year, 7 months ago
9 stars 9 fork 9 watcher
Born at : Dec. 1, 2020, 5:25 a.m. This repo has been linked 6 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-2021-33574 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-33574 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 MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RBUUWUGXVILQXVWEOU7N42ICHPJNAEUP/ [No types assigned]
    Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KJYYIMDDYOHTP2PORLABTOHYQYYREZDD/ [No types assigned]
    Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/RBUUWUGXVILQXVWEOU7N42ICHPJNAEUP/
    Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/KJYYIMDDYOHTP2PORLABTOHYQYYREZDD/
  • Modified Analysis by [email protected]

    Nov. 08, 2022

    Action Type Old Value New Value
    Changed Reference Type https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html No Types Assigned https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html Mailing List, Third Party Advisory
    Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Oct. 17, 2022

    Action Type Old Value New Value
    Added Reference https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html [No Types Assigned]
  • Modified Analysis by [email protected]

    Jan. 28, 2022

    Action Type Old Value New Value
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/KJYYIMDDYOHTP2PORLABTOHYQYYREZDD/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/KJYYIMDDYOHTP2PORLABTOHYQYYREZDD/ Mailing List, Third Party Advisory
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/RBUUWUGXVILQXVWEOU7N42ICHPJNAEUP/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/RBUUWUGXVILQXVWEOU7N42ICHPJNAEUP/ Mailing List, Third Party Advisory
    Changed Reference Type https://security.gentoo.org/glsa/202107-07 No Types Assigned https://security.gentoo.org/glsa/202107-07 Third Party Advisory
    Changed Reference Type https://security.netapp.com/advisory/ntap-20210629-0005/ No Types Assigned https://security.netapp.com/advisory/ntap-20210629-0005/ Third Party Advisory
    Changed Reference Type https://sourceware.org/bugzilla/show_bug.cgi?id=27896#c1 No Types Assigned https://sourceware.org/bugzilla/show_bug.cgi?id=27896#c1 Issue Tracking
    Changed CPE Configuration OR *cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:* versions up to (including) 2.33 OR *cpe:2.3:a:gnu:glibc:2.32:*:*:*:*:*:*:* *cpe:2.3:a:gnu:glibc:2.33:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:* versions from (including) 11.0 up to (including) 11.70.1 *cpe:2.3:o:netapp:solidfire_baseboard_management_controller_firmware:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:netapp:h300e_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h300e:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:netapp:h500e_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h500e:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:netapp:h700e_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h700e:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Jul. 07, 2021

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/KJYYIMDDYOHTP2PORLABTOHYQYYREZDD/ [No Types Assigned]
  • CVE Modified by [email protected]

    Jul. 06, 2021

    Action Type Old Value New Value
    Added Reference https://security.gentoo.org/glsa/202107-07 [No Types Assigned]
  • CVE Modified by [email protected]

    Jun. 29, 2021

    Action Type Old Value New Value
    Added Reference https://security.netapp.com/advisory/ntap-20210629-0005/ [No Types Assigned]
  • CVE Modified by [email protected]

    Jun. 14, 2021

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/RBUUWUGXVILQXVWEOU7N42ICHPJNAEUP/ [No Types Assigned]
  • CVE Modified by [email protected]

    Jun. 03, 2021

    Action Type Old Value New Value
    Changed Description The mq_notify function in the GNU C Library (aka glibc) through 2.33 has a use-after-free. It may use the notification thread attributes object (passed through its struct sigevent parameter) after it has been freed by the caller, leading to a denial of service (application crash) or possibly unspecified other impact. The mq_notify function in the GNU C Library (aka glibc) versions 2.32 and 2.33 has a use-after-free. It may use the notification thread attributes object (passed through its struct sigevent parameter) after it has been freed by the caller, leading to a denial of service (application crash) or possibly unspecified other impact.
    Added Reference https://sourceware.org/bugzilla/show_bug.cgi?id=27896#c1 [No Types Assigned]
  • Initial Analysis by [email protected]

    Jun. 01, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://sourceware.org/bugzilla/show_bug.cgi?id=27896 No Types Assigned https://sourceware.org/bugzilla/show_bug.cgi?id=27896 Exploit, Issue Tracking, Third Party Advisory
    Added CWE NIST CWE-416
    Added CPE Configuration OR *cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:* versions up to (including) 2.33
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-2021-33574 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-2021-33574 weaknesses.

Exploit Prediction

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

1.39 }} 0.20%

score

0.85929

percentile

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