CVE-2021-3712
OpenSSL ASN.1 String Buffer Overrun Vulnerability
Description
ASN.1 strings are represented internally within OpenSSL as an ASN1_STRING structure which contains a buffer holding the string data and a field holding the buffer length. This contrasts with normal C strings which are repesented as a buffer for the string data which is terminated with a NUL (0) byte. Although not a strict requirement, ASN.1 strings that are parsed using OpenSSL's own "d2i" functions (and other similar parsing functions) as well as any string whose value has been set with the ASN1_STRING_set() function will additionally NUL terminate the byte array in the ASN1_STRING structure. However, it is possible for applications to directly construct valid ASN1_STRING structures which do not NUL terminate the byte array by directly setting the "data" and "length" fields in the ASN1_STRING array. This can also happen by using the ASN1_STRING_set0() function. Numerous OpenSSL functions that print ASN.1 data have been found to assume that the ASN1_STRING byte array will be NUL terminated, even though this is not guaranteed for strings that have been directly constructed. Where an application requests an ASN.1 structure to be printed, and where that ASN.1 structure contains ASN1_STRINGs that have been directly constructed by the application without NUL terminating the "data" field, then a read buffer overrun can occur. The same thing can also occur during name constraints processing of certificates (for example if a certificate has been directly constructed by the application instead of loading it via the OpenSSL parsing functions, and the certificate contains non NUL terminated ASN1_STRING structures). It can also occur in the X509_get1_email(), X509_REQ_get1_email() and X509_get1_ocsp() functions. If a malicious actor can cause an application to directly construct an ASN1_STRING and then process it through one of the affected OpenSSL functions then this issue could be hit. This might result in a crash (causing a Denial of Service attack). It could also result in the disclosure of private memory contents (such as private keys, or sensitive plaintext). Fixed in OpenSSL 1.1.1l (Affected 1.1.1-1.1.1k). Fixed in OpenSSL 1.0.2za (Affected 1.0.2-1.0.2y).
INFO
Published Date :
Aug. 24, 2021, 3:15 p.m.
Last Modified :
June 21, 2024, 7:15 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.2
Exploitability Score :
2.2
Public PoC/Exploit Available at Github
CVE-2021-3712 has a 16 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-2021-3712
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.
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-2021-3712
.
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).
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Dockerfile Makefile Go Shell Python Java JavaScript Roff Ruby
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Dockerfile Makefile Go Shell Python Java JavaScript Roff Ruby
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Dockerfile Makefile Go Shell Python Java JavaScript Roff Ruby
None
Shell JavaScript Ruby Python Java Go Makefile Dockerfile Roff
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Dockerfile Makefile Go Shell Python Java JavaScript Roff Ruby
None
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Perl DIGITAL Command Language C Shell Assembly M4 eC Python C++ sed
Map Vulnerabilities into Different Layers of the Container Image
Python
Third party components security advisories
HTML CSS
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
None
Shell Dockerfile Makefile Go HCL Python Java JavaScript Ruby
A standalone exporter for vulnerability reports and other CRs created by Trivy Operator (formerly Starboard).
prometheus-exporter kubernetes security starboard prometheus trivy trivy-operator
Makefile Go Dockerfile Mustache Python
A small Python utility for wrapping some CNCF tools.
Python
Simple Authenticated Vulnerability Scanner for Linux hosts and Docker images
docker linux vulnerability vulnerability-scanner vulners vulnsio
Python
A vulnerability scanner for container images and filesystems
containers security vulnerability docker golang go static-analysis container-image tool oci cyclonedx vulnerabilities hacktoberfest openvex vex
Makefile Go Dockerfile Python Shell Ruby Java JavaScript Roff
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-3712
vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-3712
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]
Jun. 21, 2024
Action Type Old Value New Value Added Reference OpenSSL Software Foundation https://security.netapp.com/advisory/ntap-20240621-0006/ [No types assigned] -
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 OpenSSL Software Foundation https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=94d23fcff9b2a7a8368dfe52214d5c2569882c11 [No types assigned] Added Reference OpenSSL Software Foundation https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=ccb0a11145ee72b042d10593a64eaf9e8a55ec12 [No types assigned] Added Reference OpenSSL Software Foundation https://lists.apache.org/thread.html/r18995de860f0e63635f3008fd2a6aca82394249476d21691e7c59c9e%40%3Cdev.tomcat.apache.org%3E [No types assigned] Added Reference OpenSSL Software Foundation https://lists.apache.org/thread.html/rad5d9f83f0d11fb3f8bb148d179b8a9ad7c6a17f18d70e5805a713d1%40%3Cdev.tomcat.apache.org%3E [No types assigned] Removed Reference OpenSSL Software Foundation https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=94d23fcff9b2a7a8368dfe52214d5c2569882c11 Removed Reference OpenSSL Software Foundation https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=ccb0a11145ee72b042d10593a64eaf9e8a55ec12 Removed Reference OpenSSL Software Foundation https://lists.apache.org/thread.html/r18995de860f0e63635f3008fd2a6aca82394249476d21691e7c59c9e@%3Cdev.tomcat.apache.org%3E Removed Reference OpenSSL Software Foundation https://lists.apache.org/thread.html/rad5d9f83f0d11fb3f8bb148d179b8a9ad7c6a17f18d70e5805a713d1@%3Cdev.tomcat.apache.org%3E -
Modified Analysis by [email protected]
Dec. 06, 2022
Action Type Old Value New Value Changed Reference Type https://security.gentoo.org/glsa/202210-02 No Types Assigned https://security.gentoo.org/glsa/202210-02 Third Party Advisory -
CVE Modified by [email protected]
Oct. 16, 2022
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202210-02 [No Types Assigned] -
Modified Analysis by [email protected]
Sep. 23, 2022
Action Type Old Value New Value Changed Reference Type https://security.gentoo.org/glsa/202209-02 No Types Assigned https://security.gentoo.org/glsa/202209-02 Third Party Advisory -
CVE Modified by [email protected]
Sep. 07, 2022
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202209-02 [No Types Assigned] -
Modified Analysis by [email protected]
Aug. 06, 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 Added CPE Configuration OR *cpe:2.3:a:oracle:communications_cloud_native_core_console:1.9.0:*:*:*:*:*:*:* *cpe:2.3:a:oracle:communications_cloud_native_core_security_edge_protection_proxy:1.7.0:*:*:*:*:*:*:* *cpe:2.3:a:oracle:communications_cloud_native_core_unified_data_repository:1.15.0:*:*:*:*:*:*:* *cpe:2.3:a:oracle:communications_session_border_controller:8.4:*:*:*:*:*:*:* *cpe:2.3:a:oracle:communications_session_border_controller:9.0:*:*:*:*:*:*:* *cpe:2.3:a:oracle:communications_unified_session_manager:8.2.5:*:*:*:*:*:*:* *cpe:2.3:a:oracle:communications_unified_session_manager:8.4.5:*:*:*:*:*:*:* *cpe:2.3:a:oracle:enterprise_communications_broker:3.2.0:*:*:*:*:*:*:* *cpe:2.3:a:oracle:enterprise_communications_broker:3.3.0:*:*:*:*:*:*:* *cpe:2.3:a:oracle:enterprise_session_border_controller:8.4:*:*:*:*:*:*:* *cpe:2.3:a:oracle:enterprise_session_border_controller:9.0:*:*:*:*:*:*:* *cpe:2.3:a:oracle:health_sciences_inform_publisher:6.2.1.0:*:*:*:*:*:*:* *cpe:2.3:a:oracle:health_sciences_inform_publisher:6.3.1.1:*:*:*:*:*:*:* *cpe:2.3:a:oracle:jd_edwards_enterpriseone_tools:*:*:*:*:*:*:*:* versions up to (excluding) 9.2.6.3 *cpe:2.3:a:oracle:jd_edwards_world_security:a9.4:*:*:*:*:*:*:* -
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]
Apr. 12, 2022
Action Type Old Value New Value Changed Reference Type https://cert-portal.siemens.com/productcert/pdf/ssa-244969.pdf No Types Assigned https://cert-portal.siemens.com/productcert/pdf/ssa-244969.pdf Patch, Third Party Advisory Changed Reference Type https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf No Types Assigned https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf Patch, Third Party Advisory Changed Reference Type https://www.oracle.com/security-alerts/cpujan2022.html No Types Assigned https://www.oracle.com/security-alerts/cpujan2022.html Third Party Advisory Changed Reference Type https://www.tenable.com/security/tns-2022-02 No Types Assigned https://www.tenable.com/security/tns-2022-02 Patch, Third Party Advisory Changed CPE Configuration OR *cpe:2.3:a:tenable:tenable.sc:*:*:*:*:*:*:*:* versions from (including) 5.16.0 up to (including) 5.19.1 OR *cpe:2.3:a:tenable:nessus_network_monitor:*:*:*:*:*:*:*:* versions up to (excluding) 6.0.0 *cpe:2.3:a:tenable:tenable.sc:*:*:*:*:*:*:*:* versions from (including) 5.16.0 up to (including) 5.19.1 Changed CPE Configuration OR *cpe:2.3:a:oracle:mysql_enterprise_monitor:*:*:*:*:*:*:*:* versions up to (including) 8.0.25 *cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:* versions from (including) 5.7.0 up to (including) 5.7.35 *cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:* versions from (including) 8.0.0 up to (including) 8.0.26 *cpe:2.3:a:oracle:mysql_workbench:*:*:*:*:*:*:*:* versions up to (including) 8.0.26 *cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:* OR *cpe:2.3:a:oracle:essbase:*:*:*:*:*:*:*:* versions up to (excluding) 11.1.2.4.047 *cpe:2.3:a:oracle:essbase:*:*:*:*:*:*:*:* versions from (including) 21.0 up to (excluding) 21.3 *cpe:2.3:a:oracle:essbase:21.3:*:*:*:*:*:*:* *cpe:2.3:a:oracle:mysql_connectors:*:*:*:*:*:*:*:* versions up to (including) 8.0.27 *cpe:2.3:a:oracle:mysql_enterprise_monitor:*:*:*:*:*:*:*:* versions up to (including) 8.0.25 *cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:* versions from (including) 5.7.0 up to (including) 5.7.35 *cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:* versions from (including) 8.0.0 up to (including) 8.0.26 *cpe:2.3:a:oracle:mysql_workbench:*:*:*:*:*:*:*:* versions up to (including) 8.0.26 *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:secure_backup:18.1.0.1.0:*:*:*:*:*:*:* *cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:* versions up to (excluding) 1.0.1.1 -
CVE Modified by [email protected]
Mar. 10, 2022
Action Type Old Value New Value Added Reference https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf [No Types Assigned] -
CVE Modified by [email protected]
Feb. 08, 2022
Action Type Old Value New Value Added Reference https://cert-portal.siemens.com/productcert/pdf/ssa-244969.pdf [No Types Assigned] -
CVE Modified by [email protected]
Feb. 07, 2022
Action Type Old Value New Value Added Reference https://www.oracle.com/security-alerts/cpujan2022.html [No Types Assigned] -
CVE Modified by [email protected]
Jan. 06, 2022
Action Type Old Value New Value Added Reference https://www.tenable.com/security/tns-2022-02 [No Types Assigned] -
Modified Analysis by [email protected]
Dec. 10, 2021
Action Type Old Value New Value Changed Reference Type https://kc.mcafee.com/corporate/index?page=content&id=SB10366 No Types Assigned https://kc.mcafee.com/corporate/index?page=content&id=SB10366 Third Party Advisory Changed Reference Type https://lists.debian.org/debian-lts-announce/2021/09/msg00014.html No Types Assigned https://lists.debian.org/debian-lts-announce/2021/09/msg00014.html Mailing List, Third Party Advisory Changed Reference Type https://lists.debian.org/debian-lts-announce/2021/09/msg00021.html No Types Assigned https://lists.debian.org/debian-lts-announce/2021/09/msg00021.html Mailing List, Third Party Advisory Changed Reference Type https://www.oracle.com/security-alerts/cpuoct2021.html No Types Assigned https://www.oracle.com/security-alerts/cpuoct2021.html Patch, Third Party Advisory Changed Reference Type https://www.tenable.com/security/tns-2021-16 No Types Assigned https://www.tenable.com/security/tns-2021-16 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:*:*:*:*:*:*:* OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* *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:a:mcafee:epolicy_orchestrator:*:*:*:*:*:*:*:* versions up to (excluding) 5.10.0 *cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:-:*:*:*:*:*:* *cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_1:*:*:*:*:*:* *cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_10:*:*:*:*:*:* *cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_2:*:*:*:*:*:* *cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_3:*:*:*:*:*:* *cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_4:*:*:*:*:*:* *cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_5:*:*:*:*:*:* *cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_6:*:*:*:*:*:* *cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_7:*:*:*:*:*:* *cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_8:*:*:*:*:*:* *cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_9:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:a:tenable:tenable.sc:*:*:*:*:*:*:*:* versions from (including) 5.16.0 up to (including) 5.19.1 Added CPE Configuration OR *cpe:2.3:a:oracle:mysql_enterprise_monitor:*:*:*:*:*:*:*:* versions up to (including) 8.0.25 *cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:* versions from (including) 5.7.0 up to (including) 5.7.35 *cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:* versions from (including) 8.0.0 up to (including) 8.0.26 *cpe:2.3:a:oracle:mysql_workbench:*:*:*:*:*:*:*:* versions up to (including) 8.0.26 *cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Oct. 22, 2021
Action Type Old Value New Value Added Reference https://kc.mcafee.com/corporate/index?page=content&id=SB10366 [No Types Assigned] -
CVE Modified by [email protected]
Oct. 20, 2021
Action Type Old Value New Value Added Reference https://www.oracle.com/security-alerts/cpuoct2021.html [No Types Assigned] -
CVE Modified by [email protected]
Oct. 01, 2021
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2021/09/msg00021.html [No Types Assigned] -
CVE Modified by [email protected]
Sep. 27, 2021
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2021/09/msg00014.html [No Types Assigned] -
CVE Modified by [email protected]
Sep. 22, 2021
Action Type Old Value New Value Added Reference https://www.tenable.com/security/tns-2021-16 [No Types Assigned] -
Initial Analysis by [email protected]
Aug. 31, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H Changed Reference Type http://www.openwall.com/lists/oss-security/2021/08/26/2 No Types Assigned http://www.openwall.com/lists/oss-security/2021/08/26/2 Mailing List, Third Party Advisory Changed Reference Type https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=94d23fcff9b2a7a8368dfe52214d5c2569882c11 No Types Assigned https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=94d23fcff9b2a7a8368dfe52214d5c2569882c11 Mailing List, Patch, Vendor Advisory Changed Reference Type https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=ccb0a11145ee72b042d10593a64eaf9e8a55ec12 No Types Assigned https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=ccb0a11145ee72b042d10593a64eaf9e8a55ec12 Mailing List, Patch, Vendor Advisory Changed Reference Type https://lists.apache.org/thread.html/r18995de860f0e63635f3008fd2a6aca82394249476d21691e7c59c9e@%3Cdev.tomcat.apache.org%3E No Types Assigned https://lists.apache.org/thread.html/r18995de860f0e63635f3008fd2a6aca82394249476d21691e7c59c9e@%3Cdev.tomcat.apache.org%3E Mailing List, Third Party Advisory Changed Reference Type https://lists.apache.org/thread.html/rad5d9f83f0d11fb3f8bb148d179b8a9ad7c6a17f18d70e5805a713d1@%3Cdev.tomcat.apache.org%3E No Types Assigned https://lists.apache.org/thread.html/rad5d9f83f0d11fb3f8bb148d179b8a9ad7c6a17f18d70e5805a713d1@%3Cdev.tomcat.apache.org%3E Mailing List, Third Party Advisory Changed Reference Type https://security.netapp.com/advisory/ntap-20210827-0010/ No Types Assigned https://security.netapp.com/advisory/ntap-20210827-0010/ Third Party Advisory Changed Reference Type https://www.debian.org/security/2021/dsa-4963 No Types Assigned https://www.debian.org/security/2021/dsa-4963 Third Party Advisory Changed Reference Type https://www.openssl.org/news/secadv/20210824.txt No Types Assigned https://www.openssl.org/news/secadv/20210824.txt Vendor Advisory Added CWE NIST CWE-125 Added CPE Configuration OR *cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* versions from (including) 1.0.2 up to (excluding) 1.0.2za *cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* versions from (including) 1.1.1 up to (excluding) 1.1.1l Added CPE Configuration 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:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:clustered_data_ontap_antivirus_connector:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:* versions from (including) 11.0 up to (including) 11.50.2 *cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:manageability_software_development_kit:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:santricity_smi-s_provider:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:storage_encryption:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Aug. 27, 2021
Action Type Old Value New Value Changed Description ASN.1 strings are represented internally within OpenSSL as an ASN1_STRING structure which contains a buffer holding the string data and a field holding the buffer length. This contrasts with normal C strings which are repesented as a buffer for the string data which is terminated with a NUL (0) byte. Although not a strict requirement, ASN.1 strings that are parsed using OpenSSL's own "d2i" functions (and other similar parsing functions) as well as any string whose value has been set with the ASN1_STRING_set() function will additionally NUL terminate the byte array in the ASN1_STRING structure. However, it is possible for applications to directly construct valid ASN1_STRING structures which do not NUL terminate the byte array by directly setting the "data" and "length" fields in the ASN1_STRING array. This can also happen by using the ASN1_STRING_set0() function. Numerous OpenSSL functions that print ASN.1 data have been found to assume that the ASN1_STRING byte array will be NUL terminated, even though this is not guaranteed for strings that have been directly constructed. Where an application requests an ASN.1 structure to be printed, and where that ASN.1 structure contains ASN1_STRINGs that have been directly constructed by the application without NUL terminating the "data" field, then a read buffer overrun can occur. The same thing can also occur during name constraints processing of certificates (for example if a certificate has been directly constructed by the application instead of loading it via the OpenSSL parsing functions, and the certificate contains non NUL terminated ASN1_STRING structures). It can also occur in the X509_get1_email(), X509_REQ_get1_email() and X509_get1_ocsp() functions. If a malicious actor can cause an application to directly construct an ASN1_STRING and then process it through one of the affected OpenSSL functions then this issue could be hit. This might result in a crash (causing a Denial of Service attack). It could also result in the disclosure of private memory contents (such as private keys, or sensitive plaintext). Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1k). Fixed in OpenSSL 1.0.2za (Affected 1.0.2-1.0.2y). ASN.1 strings are represented internally within OpenSSL as an ASN1_STRING structure which contains a buffer holding the string data and a field holding the buffer length. This contrasts with normal C strings which are repesented as a buffer for the string data which is terminated with a NUL (0) byte. Although not a strict requirement, ASN.1 strings that are parsed using OpenSSL's own "d2i" functions (and other similar parsing functions) as well as any string whose value has been set with the ASN1_STRING_set() function will additionally NUL terminate the byte array in the ASN1_STRING structure. However, it is possible for applications to directly construct valid ASN1_STRING structures which do not NUL terminate the byte array by directly setting the "data" and "length" fields in the ASN1_STRING array. This can also happen by using the ASN1_STRING_set0() function. Numerous OpenSSL functions that print ASN.1 data have been found to assume that the ASN1_STRING byte array will be NUL terminated, even though this is not guaranteed for strings that have been directly constructed. Where an application requests an ASN.1 structure to be printed, and where that ASN.1 structure contains ASN1_STRINGs that have been directly constructed by the application without NUL terminating the "data" field, then a read buffer overrun can occur. The same thing can also occur during name constraints processing of certificates (for example if a certificate has been directly constructed by the application instead of loading it via the OpenSSL parsing functions, and the certificate contains non NUL terminated ASN1_STRING structures). It can also occur in the X509_get1_email(), X509_REQ_get1_email() and X509_get1_ocsp() functions. If a malicious actor can cause an application to directly construct an ASN1_STRING and then process it through one of the affected OpenSSL functions then this issue could be hit. This might result in a crash (causing a Denial of Service attack). It could also result in the disclosure of private memory contents (such as private keys, or sensitive plaintext). Fixed in OpenSSL 1.1.1l (Affected 1.1.1-1.1.1k). Fixed in OpenSSL 1.0.2za (Affected 1.0.2-1.0.2y). -
CVE Modified by [email protected]
Aug. 27, 2021
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20210827-0010/ [No Types Assigned] -
CVE Modified by [email protected]
Aug. 26, 2021
Action Type Old Value New Value Added Reference https://lists.apache.org/thread.html/rad5d9f83f0d11fb3f8bb148d179b8a9ad7c6a17f18d70e5805a713d1@%3Cdev.tomcat.apache.org%3E [No Types Assigned] -
CVE Modified by [email protected]
Aug. 26, 2021
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2021/08/26/2 [No Types Assigned] -
CVE Modified by [email protected]
Aug. 25, 2021
Action Type Old Value New Value Added Reference https://lists.apache.org/thread.html/r18995de860f0e63635f3008fd2a6aca82394249476d21691e7c59c9e@%3Cdev.tomcat.apache.org%3E [No Types Assigned] -
CVE Modified by [email protected]
Aug. 24, 2021
Action Type Old Value New Value Added Reference https://www.debian.org/security/2021/dsa-4963 [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-3712
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-2021-3712
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.49 }} 0.14%
score
0.76306
percentile