7.5
HIGH
CVE-2021-4044
OpenSSL TLS Certificate Verification Internal Error
Description

Internally libssl in OpenSSL calls X509_verify_cert() on the client side to verify a certificate supplied by a server. That function may return a negative return value to indicate an internal error (for example out of memory). Such a negative return value is mishandled by OpenSSL and will cause an IO function (such as SSL_connect() or SSL_do_handshake()) to not indicate success and a subsequent call to SSL_get_error() to return the value SSL_ERROR_WANT_RETRY_VERIFY. This return value is only supposed to be returned by OpenSSL if the application has previously called SSL_CTX_set_cert_verify_callback(). Since most applications do not do this the SSL_ERROR_WANT_RETRY_VERIFY return value from SSL_get_error() will be totally unexpected and applications may not behave correctly as a result. The exact behaviour will depend on the application but it could result in crashes, infinite loops or other similar incorrect responses. This issue is made more serious in combination with a separate bug in OpenSSL 3.0 that will cause X509_verify_cert() to indicate an internal error when processing a certificate chain. This will occur where a certificate does not include the Subject Alternative Name extension but where a Certificate Authority has enforced name constraints. This issue can occur even with valid chains. By combining the two issues an attacker could induce incorrect, application dependent behaviour. Fixed in OpenSSL 3.0.1 (Affected 3.0.0).

INFO

Published Date :

Dec. 14, 2021, 7:15 p.m.

Last Modified :

Nov. 9, 2023, 2:44 p.m.

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Public PoC/Exploit Available at Github

CVE-2021-4044 has a 3 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-2021-4044 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 h410c_firmware
2 Netapp ontap_select_deploy_administration_utility
3 Netapp cloud_backup
4 Netapp snapcenter
5 Netapp h300s_firmware
6 Netapp h500s_firmware
7 Netapp h700s_firmware
8 Netapp h410s_firmware
9 Netapp a250_firmware
10 Netapp 500f_firmware
11 Netapp e-series_performance_analyzer
12 Netapp h300e_firmware
13 Netapp h500e_firmware
14 Netapp h700e_firmware
1 Openssl openssl
1 Nodejs node.js
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-2021-4044.

URL Resource
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=758754966791c537ea95241438454aa86f91f256
https://security.netapp.com/advisory/ntap-20211229-0003/ Vendor Advisory
https://www.openssl.org/news/secadv/20211214.txt Vendor 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).

None

Updated: 1 month ago
0 stars 0 fork 0 watcher
Born at : Oct. 19, 2024, 7:04 p.m. This repo has been linked 146 different CVEs too.

None

Python

Updated: 2 months, 2 weeks ago
0 stars 0 fork 0 watcher
Born at : Sept. 5, 2024, 3:15 p.m. This repo has been linked 1 different CVEs too.

None

Updated: 2 months, 1 week ago
5 stars 0 fork 0 watcher
Born at : Feb. 23, 2023, 5:42 a.m. This repo has been linked 455 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-2021-4044 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-4044 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
  • CPE Deprecation Remap by [email protected]

    Nov. 09, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:netapp:baseboard_management_controller_500f:-:*:*:*:*:*:*:* OR *cpe:2.3:h:netapp:500f:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Nov. 09, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:netapp:baseboard_management_controller_a250:-:*:*:*:*:*:*:* OR *cpe:2.3:h:netapp:a250:-:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference OpenSSL Software Foundation https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=758754966791c537ea95241438454aa86f91f256 [No types assigned]
    Removed Reference OpenSSL Software Foundation https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=758754966791c537ea95241438454aa86f91f256
  • Reanalysis by [email protected]

    Aug. 29, 2022

    Action Type Old Value New Value
    Added CPE Configuration OR *cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* versions from (including) 17.0.0 up to (excluding) 17.3.0
  • Modified Analysis by [email protected]

    Feb. 10, 2022

    Action Type Old Value New Value
    Changed Reference Type https://security.netapp.com/advisory/ntap-20211229-0003/ No Types Assigned https://security.netapp.com/advisory/ntap-20211229-0003/ Vendor Advisory
    Added CPE Configuration OR *cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:e-series_performance_analyzer:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:netapp:baseboard_management_controller_a250_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:baseboard_management_controller_a250:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:netapp:baseboard_management_controller_500f_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:baseboard_management_controller_500f:-:*:*:*:*:*:*:*
    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:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h410c:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Dec. 29, 2021

    Action Type Old Value New Value
    Added Reference https://security.netapp.com/advisory/ntap-20211229-0003/ [No Types Assigned]
  • Initial Analysis by [email protected]

    Dec. 23, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=758754966791c537ea95241438454aa86f91f256 No Types Assigned https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=758754966791c537ea95241438454aa86f91f256 Patch, Third Party Advisory
    Changed Reference Type https://www.openssl.org/news/secadv/20211214.txt No Types Assigned https://www.openssl.org/news/secadv/20211214.txt Vendor Advisory
    Added CWE NIST CWE-835
    Added CPE Configuration OR *cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* versions up to (excluding) 1.0.2 *cpe:2.3:a:openssl:openssl:1.1.0:*:*:*:*:*:*:* *cpe:2.3:a:openssl:openssl:3.0.0:*:*:*:*:*:*:*
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-2021-4044 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-2021-4044 weaknesses.

Exploit Prediction

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

0.23 }} 0.03%

score

0.61450

percentile

CVSS31 - Vulnerability Scoring System
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