GHSA-q9wj-f4qw-6vfj · Severity: high · Ecosystem: rust — Read buffer overruns processing ASN.1 strings
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).
Conclusion & alert: CVE-2021-3712 is rated High Risk (69.2/100): CVSS High severity, with high exploitation likelihood (EPSS 50.44%, 99th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +49.98% over the last day, indicating growing attacker interest. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.46% | 50.44% | +49.98% |
| 2 | 2026-04-26 | 0.41% | 0.46% | +0.05% |
| 3 | 2026-04-22 | — | 0.41% | — |
Full EPSS history (48 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.4 | 3.1 | HIGH |
|
2.2 | 5.2 | [email protected] |
| 7.4 | 3.1 | HIGH |
|
2.2 | 5.2 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| 5.8 | 2.0 | MEDIUM |
|
8.6 | 4.9 | [email protected] |
GHSA-q9wj-f4qw-6vfj · Severity: high · Ecosystem: rust — Read buffer overruns processing ASN.1 strings
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2021-3712: 3 source package rows (openssl, openssl1.1-compat, openssl3); 54 state rows across 12 repos (3.11-main, 3.12-main, 3.17-community, 3.17-main, 3.18-community, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-community, edge-main); fixed 14, open 40. | https://security.alpinelinux.org/vuln/CVE-2021-3712 |
debian
|
not yet assigned | CVE-2021-3712 not yet assigned priority: Debian including 1 source packages (openssl), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2021-3712 |
gentoo
|
normal | CVE-2021-3712: 2 GLSA(s) (202209-02, 202210-02), 2 atom(s) (app-backup/tsm, dev-libs/openssl); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2021-3712 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2021-3712 |
suse
|
medium | CVE-2021-3712 severity moderate: SUSE including 595 source package names (0.1.0:libopenssl1_1-1.1.0i-14.21.2, 0.1.75:libopenssl1_1-1.1.0i-14.21.2, …), 1177 product×package rows across 243 product lines (Container bci/bci-init, Container bci/dotnet-aspnet, … (243 product lines)): Fixed 973, Known Affected 142, Known Not Affected 62. | https://www.suse.com/security/cve/CVE-2021-3712/ |
ubuntu
|
medium | CVE-2021-3712 medium priority: Ubuntu including 4 source packages (edk2, nodejs, openssl, openssl1.0), 60 status rows across 15 suites (bionic, focal, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 21, released 18, DNE 14, needs-triage 6, ignored 1. | https://ubuntu.com/security/CVE-2021-3712 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| openssl | openssl | >= 1.0.2, < 1.0.2za | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
| openssl | openssl | >= 1.1.1, < 1.1.1l | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
| debian | debian_linux | 9.0 | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
| debian | debian_linux | 10.0 | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
| debian | debian_linux | 11.0 | cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* |
| netapp | clustered_data_ontap | — | cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:* |
| netapp | clustered_data_ontap_antivirus_connector | — | cpe:2.3:a:netapp:clustered_data_ontap_antivirus_connector:-:*:*:*:*:*:*:* |
| netapp | e-series_santricity_os_controller | >= 11.0, <= 11.50.2 | cpe:2.3:a:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:* |
| netapp | hci_management_node | — | cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:* |
| netapp | manageability_software_development_kit | — | cpe:2.3:a:netapp:manageability_software_development_kit:-:*:*:*:*:*:*:* |
| netapp | santricity_smi-s_provider | — | cpe:2.3:a:netapp:santricity_smi-s_provider:-:*:*:*:*:*:*:* |
| netapp | solidfire | — | cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:* |
| netapp | storage_encryption | — | cpe:2.3:a:netapp:storage_encryption:-:*:*:*:*:*:*:* |
| mcafee | epolicy_orchestrator | < 5.10.0 | cpe:2.3:a:mcafee:epolicy_orchestrator:*:*:*:*:*:*:*:* |
| mcafee | epolicy_orchestrator | 5.10.0 | cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:-:*:*:*:*:*:* |
| mcafee | epolicy_orchestrator | 5.10.0 | cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_1:*:*:*:*:*:* |
| mcafee | epolicy_orchestrator | 5.10.0 | cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_10:*:*:*:*:*:* |
| mcafee | epolicy_orchestrator | 5.10.0 | cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_2:*:*:*:*:*:* |
| mcafee | epolicy_orchestrator | 5.10.0 | cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_3:*:*:*:*:*:* |
| mcafee | epolicy_orchestrator | 5.10.0 | cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_4:*:*:*:*:*:* |
| mcafee | epolicy_orchestrator | 5.10.0 | cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_5:*:*:*:*:*:* |
| mcafee | epolicy_orchestrator | 5.10.0 | cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_6:*:*:*:*:*:* |
| mcafee | epolicy_orchestrator | 5.10.0 | cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_7:*:*:*:*:*:* |
| mcafee | epolicy_orchestrator | 5.10.0 | cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_8:*:*:*:*:*:* |
| mcafee | epolicy_orchestrator | 5.10.0 | cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_9:*:*:*:*:*:* |
| tenable | nessus_network_monitor | < 6.0.0 | cpe:2.3:a:tenable:nessus_network_monitor:*:*:*:*:*:*:*:* |
| tenable | tenable.sc | >= 5.16.0, <= 5.19.1 | cpe:2.3:a:tenable:tenable.sc:*:*:*:*:*:*:*:* |
| oracle | essbase | < 11.1.2.4.047 | cpe:2.3:a:oracle:essbase:*:*:*:*:*:*:*:* |
| oracle | essbase | >= 21.0, < 21.3 | cpe:2.3:a:oracle:essbase:*:*:*:*:*:*:*:* |
| oracle | essbase | 21.3 | cpe:2.3:a:oracle:essbase:21.3:*:*:*:*:*:*:* |
| oracle | mysql_connectors | <= 8.0.27 | cpe:2.3:a:oracle:mysql_connectors:*:*:*:*:*:*:*:* |
| oracle | mysql_enterprise_monitor | <= 8.0.25 | cpe:2.3:a:oracle:mysql_enterprise_monitor:*:*:*:*:*:*:*:* |
| oracle | mysql_server | >= 5.7.0, <= 5.7.35 | cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:* |
| oracle | mysql_server | >= 8.0.0, <= 8.0.26 | cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:* |
| oracle | mysql_workbench | <= 8.0.26 | cpe:2.3:a:oracle:mysql_workbench:*:*:*:*:*:*:*:* |
| oracle | peoplesoft_enterprise_peopletools | 8.57 | cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.57:*:*:*:*:*:*:* |
| oracle | peoplesoft_enterprise_peopletools | 8.58 | cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.58:*:*:*:*:*:*:* |
| oracle | peoplesoft_enterprise_peopletools | 8.59 | cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.59:*:*:*:*:*:*:* |
| oracle | secure_backup | 18.1.0.1.0 | cpe:2.3:a:oracle:secure_backup:18.1.0.1.0:*:*:*:*:*:*:* |
| oracle | zfs_storage_appliance_kit | 8.8 | cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:* |
| siemens | sinec_infrastructure_network_services | < 1.0.1.1 | cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:* |
| oracle | communications_cloud_native_core_console | 1.9.0 | cpe:2.3:a:oracle:communications_cloud_native_core_console:1.9.0:*:*:*:*:*:*:* |
| oracle | communications_cloud_native_core_security_edge_protection_proxy | 1.7.0 | cpe:2.3:a:oracle:communications_cloud_native_core_security_edge_protection_proxy:1.7.0:*:*:*:*:*:*:* |
| oracle | communications_cloud_native_core_unified_data_repository | 1.15.0 | cpe:2.3:a:oracle:communications_cloud_native_core_unified_data_repository:1.15.0:*:*:*:*:*:*:* |
| oracle | communications_session_border_controller | 8.4 | cpe:2.3:a:oracle:communications_session_border_controller:8.4:*:*:*:*:*:*:* |
| oracle | communications_session_border_controller | 9.0 | cpe:2.3:a:oracle:communications_session_border_controller:9.0:*:*:*:*:*:*:* |
| oracle | communications_unified_session_manager | 8.2.5 | cpe:2.3:a:oracle:communications_unified_session_manager:8.2.5:*:*:*:*:*:*:* |
| oracle | communications_unified_session_manager | 8.4.5 | cpe:2.3:a:oracle:communications_unified_session_manager:8.4.5:*:*:*:*:*:*:* |
| oracle | enterprise_communications_broker | 3.2.0 | cpe:2.3:a:oracle:enterprise_communications_broker:3.2.0:*:*:*:*:*:*:* |
| oracle | enterprise_communications_broker | 3.3.0 | cpe:2.3:a:oracle:enterprise_communications_broker:3.3.0:*:*:*:*:*:*:* |
| oracle | enterprise_session_border_controller | 8.4 | cpe:2.3:a:oracle:enterprise_session_border_controller:8.4:*:*:*:*:*:*:* |
| oracle | enterprise_session_border_controller | 9.0 | cpe:2.3:a:oracle:enterprise_session_border_controller:9.0:*:*:*:*:*:*:* |
| oracle | health_sciences_inform_publisher | 6.2.1.0 | cpe:2.3:a:oracle:health_sciences_inform_publisher:6.2.1.0:*:*:*:*:*:*:* |
| oracle | health_sciences_inform_publisher | 6.3.1.1 | cpe:2.3:a:oracle:health_sciences_inform_publisher:6.3.1.1:*:*:*:*:*:*:* |
| oracle | jd_edwards_enterpriseone_tools | < 9.2.6.3 | cpe:2.3:a:oracle:jd_edwards_enterpriseone_tools:*:*:*:*:*:*:*:* |
| oracle | jd_edwards_world_security | a9.4 | cpe:2.3:a:oracle:jd_edwards_world_security:a9.4:*:*:*:*:*:*:* |