CVE-2021-23841

5.9

MEDIUM

OpenSSL X509_issuer_and_serial_hash Denial of Service

Description

The OpenSSL public API function X509_issuer_and_serial_hash() attempts to create a unique hash value based on the issuer and serial number data contained within an X509 certificate. However it fails to correctly handle any errors that may occur while parsing the issuer field (which might occur if the issuer field is maliciously constructed). This may subsequently result in a NULL pointer deref and a crash leading to a potential denial of service attack. The function X509_issuer_and_serial_hash() is never directly called by OpenSSL itself so applications are only vulnerable if they use this function directly and they use it on certificates that may have been obtained from untrusted sources. OpenSSL versions 1.1.1i and below are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1j. OpenSSL versions 1.0.2x and below are affected by this issue. However OpenSSL 1.0.2 is out of support and no longer receiving public updates. Premium support customers of OpenSSL 1.0.2 should upgrade to 1.0.2y. Other users should upgrade to 1.1.1j. Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1i). Fixed in OpenSSL 1.0.2y (Affected 1.0.2-1.0.2x).

INFO

Published Date :

Feb. 16, 2021, 5:15 p.m.

Last Modified :

June 21, 2024, 7:15 p.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

2.2 Public PoC/Exploit Available at Github

CVE-2021-23841 has a 19 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-2021-23841 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
1	Oracle	zfs_storage_appliance_kit
2	Oracle	business_intelligence
3	Oracle	peoplesoft_enterprise_peopletools
4	Oracle	enterprise_manager_ops_center
5	Oracle	mysql_enterprise_monitor
6	Oracle	communications_cloud_native_core_policy
7	Oracle	essbase
8	Oracle	graalvm
9	Oracle	mysql_server
10	Oracle	enterprise_manager_for_storage_management
11	Oracle	jd_edwards_world_security
1	Apple	macos
2	Apple	iphone_os
3	Apple	safari
4	Apple	ipados
1	Netapp	oncommand_insight
2	Netapp	oncommand_workflow_automation
3	Netapp	snapcenter
1	Tenable	tenable.sc
2	Tenable	nessus_network_monitor
1	Debian	debian_linux
1	Openssl	openssl
1	Siemens	sinec_ins

: Total Affected Vendor : 7 | Products : 23

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-2021-23841.

URL	Resource
http://seclists.org/fulldisclosure/2021/May/67	Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2021/May/68	Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2021/May/70	Mailing List Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf	Patch Third Party Advisory
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=122a19ab48091c657f7cb1fb3af9fc07bd557bbf
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=8252ee4d90f3f2004d3d0aeeed003ad49c9a7807
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44846	Third Party Advisory
https://security.gentoo.org/glsa/202103-03	Third Party Advisory
https://security.netapp.com/advisory/ntap-20210219-0009/	Third Party Advisory
https://security.netapp.com/advisory/ntap-20210513-0002/	Third Party Advisory
https://security.netapp.com/advisory/ntap-20240621-0006/
https://support.apple.com/kb/HT212528	Third Party Advisory
https://support.apple.com/kb/HT212529	Third Party Advisory
https://support.apple.com/kb/HT212534	Third Party Advisory
https://www.debian.org/security/2021/dsa-4855	Third Party Advisory
https://www.openssl.org/news/secadv/20210216.txt	Vendor Advisory
https://www.oracle.com//security-alerts/cpujul2021.html	Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpuApr2021.html	Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html	Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.html	Patch Third Party Advisory
https://www.tenable.com/security/tns-2021-03	Third Party Advisory
https://www.tenable.com/security/tns-2021-09	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).

juwisnie/AZDevops-TrivyScan-Pipe

Based in https://github.com/arindam0310018/04-Apr-2022-DevOps__Scan-Images-In-ACR-Using-Trivy

Dockerfile HTML

Updated: 2 months ago

0 stars 0 fork 0 watcher

Born at : Sept. 19, 2024, 3:48 p.m. This repo has been linked 19 different CVEs too.

NaInSec/CVE-PoC-in-GitHub

All CVE - PoC in GitHub

poc proofofconcept tester allcve cvegithub cvenew cvepoc cveupdate

Updated: 2 months, 3 weeks ago

5 stars 2 fork 2 watcher

Born at : March 22, 2024, 3:58 p.m. This repo has been linked 928 different CVEs too.

zecool/cve

None

Updated: 8 months, 1 week ago

1 stars 0 fork 0 watcher

Born at : March 11, 2024, 1:21 p.m. This repo has been linked 930 different CVEs too.

fredrkl/trivy-demo

Demo repository showcasing some of the possibilities of Aqua Trivy.

cncf-demo trivy

Dockerfile Shell

Updated: 1 year, 3 months ago

0 stars 0 fork 0 watcher

Born at : May 6, 2023, 9:42 a.m. This repo has been linked 27 different CVEs too.

whoforget/CVE-POC

None

Updated: 1 year, 7 months ago

0 stars 2 fork 2 watcher

Born at : April 8, 2023, 6:19 a.m. This repo has been linked 923 different CVEs too.

chnzzh/OpenSSL-CVE-lib

None

Updated: 2 months, 2 weeks 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.

k0mi-tg/CVE-POC

None

Updated: 9 months, 1 week ago

20 stars 3 fork 3 watcher

Born at : Feb. 14, 2023, 6:10 p.m. This repo has been linked 921 different CVEs too.

WhooAmii/POC_to_review

None

Updated: 9 months ago

2 stars 2 fork 2 watcher

Born at : Nov. 25, 2022, 5:43 p.m. This repo has been linked 930 different CVEs too.

vincent-deng/veracode-container-security-finding-parser

Map Vulnerabilities into Different Layers of the Container Image

Python

Updated: 1 year, 10 months ago

1 stars 0 fork 0 watcher

Born at : Oct. 5, 2022, 12:07 p.m. This repo has been linked 1276 different CVEs too.

Satheesh575555/Openssl_1_1_0_CVE-2021-23841

None

Shell Perl DIGITAL Command Language C Assembly M4 eC Python

Updated: 1 year, 7 months ago

0 stars 0 fork 0 watcher

Born at : Aug. 5, 2022, 10:52 a.m. This repo has been linked 1 different CVEs too.

thecyberbaby/Trivy-by-AquaSecurity

A security framework by Aquasecurity

Updated: 2 years, 4 months ago

0 stars 0 fork 0 watcher

Born at : June 22, 2022, 10:40 a.m. This repo has been linked 16 different CVEs too.

Trinadh465/external_boringssl_openssl_1.1.0g_CVE-2021-23841

None

Shell Perl DIGITAL Command Language C Assembly M4 eC Python

Updated: 1 year, 7 months ago

0 stars 0 fork 0 watcher

Born at : April 29, 2022, 10:16 a.m. This repo has been linked 1 different CVEs too.

arindam0310018/04-Apr-2022-DevOps__Scan-Images-In-ACR-Using-Trivy

DEVOPS + ACR + TRIVY

azure azurecontainerregistry devops devops-pipeline powershell

Dockerfile HTML

Updated: 9 months, 1 week ago

5 stars 8 fork 8 watcher

Born at : April 4, 2022, 1:59 p.m. This repo has been linked 19 different CVEs too.

fdl66/openssl-1.0.2u-fix-cve

本项目旨在解决openssl1.0.2u的漏洞问题。（1.0.2官方不在维护，所以，相关的漏洞修复代码都已经闭源，此处是从相近版本合入的代码，源码来源：https://github.com/openssl/openssl/tree/OpenSSL_1_0_2u）

Shell C++ C Batchfile Perl DIGITAL Command Language Makefile Assembly XS M4

Updated: 3 months, 3 weeks ago

10 stars 4 fork 4 watcher

Born at : April 3, 2022, 12:51 p.m. This repo has been linked 9 different CVEs too.

jntass/TASSL-1.1.1k

此仓库已停止维护，请移步https://github.com/jntass/TASSL-1.1.1

Perl DIGITAL Command Language C Shell Assembly M4 eC Python C++ sed

Updated: 8 months, 2 weeks ago

54 stars 16 fork 16 watcher

Born at : Nov. 24, 2021, 6:39 a.m. This repo has been linked 13 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-2021-23841 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-23841 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.

Action	Type	Old Value	New Value
Added	Reference		OpenSSL Software Foundation https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=122a19ab48091c657f7cb1fb3af9fc07bd557bbf [No types assigned]
Added	Reference		OpenSSL Software Foundation https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=8252ee4d90f3f2004d3d0aeeed003ad49c9a7807 [No types assigned]
Removed	Reference	OpenSSL Software Foundation https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=8252ee4d90f3f2004d3d0aeeed003ad49c9a7807
Removed	Reference	OpenSSL Software Foundation https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=122a19ab48091c657f7cb1fb3af9fc07bd557bbf

Action	Type	Old Value	New Value
Changed	Reference Type	https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf No Types Assigned	https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf Patch, Third Party Advisory
Added	CPE Configuration		OR cpe:2.3:a:siemens:sinec_ins::::::::* versions up to (excluding) 1.0 cpe:2.3:a:siemens:sinec_ins:1.0:-::::::* cpe:2.3:a:siemens:sinec_ins:1.0:sp1::::::*

Action	Type	Old Value	New Value
Added	Reference		https://support.apple.com/kb/HT212528 [No Types Assigned]
Added	Reference		https://support.apple.com/kb/HT212534 [No Types Assigned]

Action	Type	Old Value	New Value
Removed	CVSS V2	NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P)
Added	CVSS V2		NIST (AV:N/AC:M/Au:N/C:N/I:N/A:P)
Removed	CVSS V3.1	NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Added	CVSS V3.1		NIST AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Changed	Reference Type	https://www.tenable.com/security/tns-2021-03 No Types Assigned	https://www.tenable.com/security/tns-2021-03 Third Party Advisory
Changed	CPE Configuration	OR cpe:2.3:a:openssl:openssl::::::::* versions from (including) 1.0.2 up to (including) 1.0.2x	OR cpe:2.3:a:openssl:openssl::::::::* versions from (including) 1.0.2 up to (excluding) 1.0.2y cpe:2.3:a:openssl:openssl::::::::* versions from (including) 1.1.1 up to (excluding) 1.1.1j
Added	CPE Configuration		OR cpe:2.3:a:tenable:tenable.sc::::::::* versions from (including) 5.13.0 up to (including) 5.17.0

Action	Type	Old Value	New Value
Changed	Description	Calls to EVP_CipherUpdate, EVP_EncryptUpdate and EVP_DecryptUpdate may overflow the output length argument in some cases where the input length is close to the maximum permissable length for an integer on the platform. In such cases the return value from the function call will be 1 (indicating success), but the output length value will be negative. This could cause applications to behave incorrectly or crash. OpenSSL versions 1.1.1i and below are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1j. OpenSSL versions 1.0.2x and below are affected by this issue. However OpenSSL 1.0.2 is out of support and no longer receiving public updates. Premium support customers of OpenSSL 1.0.2 should upgrade to 1.0.2y. Other users should upgrade to 1.1.1j. Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1i). Fixed in OpenSSL 1.0.2y (Affected 1.0.2-1.0.2x).	The OpenSSL public API function X509_issuer_and_serial_hash() attempts to create a unique hash value based on the issuer and serial number data contained within an X509 certificate. However it fails to correctly handle any errors that may occur while parsing the issuer field (which might occur if the issuer field is maliciously constructed). This may subsequently result in a NULL pointer deref and a crash leading to a potential denial of service attack. The function X509_issuer_and_serial_hash() is never directly called by OpenSSL itself so applications are only vulnerable if they use this function directly and they use it on certificates that may have been obtained from untrusted sources. OpenSSL versions 1.1.1i and below are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1j. OpenSSL versions 1.0.2x and below are affected by this issue. However OpenSSL 1.0.2 is out of support and no longer receiving public updates. Premium support customers of OpenSSL 1.0.2 should upgrade to 1.0.2y. Other users should upgrade to 1.1.1j. Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1i). Fixed in OpenSSL 1.0.2y (Affected 1.0.2-1.0.2x).
Removed	Reference	https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=6a51b9e1d0cf0bf8515f7201b68fb0a3482b3dc1 [No Types Assigned]
Removed	Reference	https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=9b1129239f3ebb1d1c98ce9ed41d5c9476c47cb2 [No Types Assigned]
Added	Reference		https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=8252ee4d90f3f2004d3d0aeeed003ad49c9a7807 [No Types Assigned]
Added	Reference		https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=122a19ab48091c657f7cb1fb3af9fc07bd557bbf [No Types Assigned]

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
Changed	CPE Configuration	OR cpe:2.3:a:oracle:business_intelligence:5.5.0.0.0::::enterprise:::* cpe:2.3:a:oracle:business_intelligence:5.9.0.0.0::::enterprise:::* cpe:2.3:a:oracle:business_intelligence:12.2.1.3.0::::enterprise:::* cpe:2.3:a:oracle:business_intelligence:12.2.1.4.0::::enterprise:::* cpe:2.3:a:oracle:enterprise_manager_ops_center:12.4.0.0::::::: cpe:2.3:a:oracle:essbase:21.2::::::: cpe:2.3:a:oracle:graalvm:19.3.5::::enterprise:::* cpe:2.3:a:oracle:graalvm:20.3.1.2::::enterprise:::* cpe:2.3:a:oracle:graalvm:21.0.0.2::::enterprise:::* cpe:2.3:a:oracle:jd_edwards_world_security:a9.4::::::: cpe:2.3:a:oracle:mysql_enterprise_monitor::::::::* versions up to (excluding) 8.0.23 cpe:2.3:a:oracle:mysql_server::::::::* versions up to (excluding) 5.7.33 cpe:2.3:a:oracle:mysql_server::::::::* versions from (including) 8.0.15 up to (excluding) 8.0.23 cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.57::::::: cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.58::::::: cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.59::::::: cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:::::::	OR cpe:2.3:a:oracle:business_intelligence:5.5.0.0.0::::enterprise:::* cpe:2.3:a:oracle:business_intelligence:5.9.0.0.0::::enterprise:::* cpe:2.3:a:oracle:business_intelligence:12.2.1.3.0::::enterprise:::* cpe:2.3:a:oracle:business_intelligence:12.2.1.4.0::::enterprise:::* cpe:2.3:a:oracle:communications_cloud_native_core_policy:1.15.0::::::: cpe:2.3:a:oracle:enterprise_manager_for_storage_management:13.4.0.0::::::: cpe:2.3:a:oracle:enterprise_manager_ops_center:12.4.0.0::::::: cpe:2.3:a:oracle:essbase:21.2::::::: cpe:2.3:a:oracle:graalvm:19.3.5::::enterprise:::* cpe:2.3:a:oracle:graalvm:20.3.1.2::::enterprise:::* cpe:2.3:a:oracle:graalvm:21.0.0.2::::enterprise:::* cpe:2.3:a:oracle:jd_edwards_world_security:a9.4::::::: cpe:2.3:a:oracle:mysql_enterprise_monitor::::::::* versions up to (excluding) 8.0.23 cpe:2.3:a:oracle:mysql_server::::::::* versions up to (excluding) 5.7.33 cpe:2.3:a:oracle:mysql_server::::::::* versions from (including) 8.0.15 up to (excluding) 8.0.23 cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.57::::::: cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.58::::::: cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.59::::::: cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:::::::

CVE-2021-23841

OpenSSL X509_issuer_and_serial_hash Denial of Service

Description

INFO

Feb. 16, 2021, 5:15 p.m.

June 21, 2024, 7:15 p.m.

Yes !

3.6

2.2

Public PoC/Exploit Available at Github

Affected Products

References to Advisories, Solutions, and Tools

CVE Modified by [email protected]

CVE Modified by [email protected]

CVE Modified by [email protected]

CPE Deprecation Remap by [email protected]

Modified Analysis by [email protected]

CVE Modified by [email protected]

Modified Analysis by [email protected]

CWE Remap by [email protected]

CVE Modified by [email protected]

Modified Analysis by [email protected]

CVE Modified by [email protected]

CVE Modified by [email protected]

CVE Modified by [email protected]

Modified Analysis by [email protected]

CVE Modified by [email protected]

CVE Modified by [email protected]

Modified Analysis by [email protected]

CVE Modified by [email protected]

CVE Modified by [email protected]

CVE Modified by [email protected]

CVE Modified by [email protected]

CVE Modified by [email protected]

Modified Analysis by [email protected]

CVE Modified by [email protected]

Initial Analysis by [email protected]

CVE Modified by [email protected]

CVE Modified by [email protected]

CVE Modified by [email protected]

CWE - Common Weakness Enumeration

Common Attack Pattern Enumeration and Classification (CAPEC)

Exploit Prediction

0.42 }} 0.02%

0.73601

CVSS31 - Vulnerability Scoring System

Theme Customizer

Layout

Vertical

Horizontal

Two Column

Color Scheme

Light

Dark

Layout Width

Fluid

Boxed

Layout Position

Topbar Color

Light

Dark

Sidebar Size

Default

Compact

Small (Icon View)

Small Hover View

Sidebar View

Default

Detached

Sidebar Color

Light

Dark

Gradient

Preloader

Enable

Disable