Vulnerability Database

328,409

Total vulnerabilities in the database

CVE-2021-3449

An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a client. If a TLSv1.2 renegotiation ClientHello omits the signature_algorithms extension (where it was present in the initial ClientHello), but includes a signature_algorithms_cert extension then a NULL pointer dereference will result, leading to a crash and a denial of service attack. A server is only vulnerable if it has TLSv1.2 and renegotiation enabled (which is the default configuration). OpenSSL TLS clients are not impacted by this issue. All OpenSSL 1.1.1 versions are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1-1.1.1j).

CVSS v3:

  • Severity: Medium
  • Score: 5.9
  • AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v2:

  • Severity: Low
  • Score: 4.3
  • AV:N/AC:M/Au:N/C:N/I:N/A:P

CWEs:

Software From Fixed in
openssl / openssl 1.1.1 1.1.1k
debian / debian_linux 9.0 9.0.x
debian / debian_linux 10.0 10.0.x
freebsd / freebsd 12.2-p1 12.2-p1.x
freebsd / freebsd 12.2-p2 12.2-p2.x
freebsd / freebsd 12.2 12.2.x
tenable / tenable.sc 5.13.0 5.17.0.x
tenable / nessus - 8.13.1.x
tenable / nessus_network_monitor 5.11.1 5.11.1.x
tenable / nessus_network_monitor 5.12.0 5.12.0.x
tenable / nessus_network_monitor 5.12.1 5.12.1.x
tenable / nessus_network_monitor 5.13.0 5.13.0.x
tenable / nessus_network_monitor 5.11.0 5.11.0.x
tenable / log_correlation_engine - 6.0.9
fedoraproject / fedora 34 34.x
mcafee / web_gateway_cloud_service 10.1.1 10.1.1.x
mcafee / web_gateway_cloud_service 9.2.10 9.2.10.x
mcafee / web_gateway_cloud_service 8.2.19 8.2.19.x
mcafee / web_gateway 10.1.1 10.1.1.x
mcafee / web_gateway 9.2.10 9.2.10.x
mcafee / web_gateway 8.2.19 8.2.19.x
checkpoint / quantum_security_management_firmware r80.40 r80.40.x
checkpoint / quantum_security_management_firmware r81 r81.x
checkpoint / multi-domain_management_firmware r80.40 r80.40.x
checkpoint / multi-domain_management_firmware r81 r81.x
checkpoint / quantum_security_gateway_firmware r80.40 r80.40.x
checkpoint / quantum_security_gateway_firmware r81 r81.x
oracle / peoplesoft_enterprise_peopletools 8.57 8.57.x
oracle / jd_edwards_world_security a9.4 a9.4.x
oracle / primavera_unifier 17.7 17.12.x
oracle / peoplesoft_enterprise_peopletools 8.58 8.58.x
oracle / primavera_unifier 19.12 19.12.x
oracle / enterprise_manager_for_storage_management 13.4.0.0 13.4.0.0.x
oracle / primavera_unifier 20.12 20.12.x
oracle / zfs_storage_appliance_kit 8.8 8.8.x
oracle / secure_global_desktop 5.6 5.6.x
oracle / graalvm 20.3.1.2 20.3.1.2.x
oracle / graalvm 21.0.0.2 21.0.0.2.x
oracle / graalvm 19.3.5 19.3.5.x
oracle / mysql_server 8.0.15 8.0.23.x
oracle / mysql_server - 5.7.33.x
oracle / mysql_workbench - 8.0.23.x
oracle / peoplesoft_enterprise_peopletools 8.59 8.59.x
oracle / essbase 21.2 21.2.x
oracle / mysql_connectors - 8.0.23.x
oracle / jd_edwards_enterpriseone_tools - 9.2.6.0
oracle / primavera_unifier 21.12 21.12.x
oracle / secure_backup - 18.1.0.1.0
oracle / communications_communications_policy_management 12.6.0.0.0 12.6.0.0.0.x
sonicwall / sma100_firmware 10.2.0.0 10.2.1.0-17sv
sonicwall / capture_client 3.5 3.5.x
sonicwall / sonicos 7.0.1.0 7.0.1.0.x
siemens / ruggedcom_rcm1224_firmware 6.2 6.2.x
siemens / scalance_lpe9403_firmware - -
siemens / scalance_m-800_firmware 6.2 6.2.x
siemens / scalance_s602_firmware 4.1 4.1.x
siemens / scalance_s612_firmware 4.1 4.1.x
siemens / scalance_s615_firmware 6.2 6.2.x
siemens / scalance_s623_firmware 4.1 4.1.x
siemens / scalance_s627-2m_firmware 4.1 4.1.x
siemens / scalance_sc-600_firmware 2.0 2.0.x
siemens / scalance_w700_firmware 6.5 6.5.x
siemens / scalance_w1700_firmware 2.0 2.0.x
siemens / scalance_xb-200_firmware - 4.3
siemens / scalance_xc-200_firmware - 4.3
siemens / scalance_xf-200ba_firmware - 4.3
siemens / scalance_xm-400_firmware - 6.4
siemens / scalance_xp-200_firmware - 4.3
siemens / scalance_xr-300wg_firmware - 4.3
siemens / scalance_xr524-8c_firmware - 6.4
siemens / scalance_xr526-8c_firmware - 6.4
siemens / scalance_xr528-6m_firmware - 6.4
siemens / scalance_xr552-12_firmware - 6.4
siemens / simatic_cloud_connect_7_firmware 1.1 1.1.x
siemens / simatic_cp_1242-7_gprs_v2_firmware 3.1 3.1.x
siemens / simatic_hmi_basic_panels_2nd_generation_firmware - -
siemens / simatic_hmi_comfort_outdoor_panels_firmware - -
siemens / simatic_hmi_ktp_mobile_panels_firmware - -
siemens / simatic_mv500_firmware - -
siemens / simatic_net_cp_1243-1_firmware 3.1 3.1.x
siemens / simatic_net_cp1243-7_lte_eu_firmware 3.1 3.1.x
siemens / simatic_net_cp1243-7_lte_us_firmware 3.1 3.1.x
siemens / simatic_net_cp_1243-8_irc_firmware 3.1 3.1.x
siemens / simatic_net_cp_1542sp-1_irc_firmware 2.1 2.1.x
siemens / simatic_net_cp_1543-1_firmware 2.2 3.0
siemens / simatic_net_cp_1543sp-1_firmware 2.1 2.1.x
siemens / simatic_net_cp_1545-1_firmware 1.0 1.0.x
siemens / simatic_pcs_7_telecontrol_firmware - -
siemens / simatic_pcs_neo_firmware - -
siemens / simatic_pdm_firmware 9.1.0.7 9.1.0.7.x
siemens / simatic_process_historian_opc_ua_server_firmware 2019 2019.x
siemens / simatic_rf166c_firmware - -
siemens / simatic_rf185c_firmware - -
siemens / simatic_rf186c_firmware - -
siemens / simatic_rf186ci_firmware - -
siemens / simatic_rf188c_firmware - -
siemens / simatic_rf188ci_firmware - -
siemens / simatic_rf360r_firmware - -
siemens / simatic_s7-1200_cpu_1211c_firmware - -
siemens / simatic_s7-1200_cpu_1212c_firmware - -
siemens / simatic_s7-1200_cpu_1212fc_firmware - -
siemens / simatic_s7-1200_cpu_1214_fc_firmware - -
siemens / simatic_s7-1200_cpu_1214c_firmware - -
siemens / simatic_s7-1200_cpu_1215_fc_firmware - -
siemens / simatic_s7-1200_cpu_1215c_firmware - -
siemens / simatic_s7-1200_cpu_1217c_firmware - -
siemens / simatic_s7-1500_cpu_1518-4_pn/dp_mfp_firmware - -
siemens / sinamics_connect_300_firmware - -
siemens / tim_1531_irc_firmware 2.0 2.2
siemens / simatic_wincc_runtime_advanced - -
siemens / sinema_server 14.0-sp2_update1 14.0-sp2_update1.x
siemens / sinema_server 14.0-sp1 14.0-sp1.x
siemens / sinema_server 14.0-sp2 14.0-sp2.x
siemens / sinema_server 14.0 14.0.x
siemens / simatic_logon 1.6.0.2 1.6.0.2.x
siemens / simatic_logon 1.5-sp3_update_1 1.5-sp3_update_1.x
siemens / sinec_nms 1.0-sp1 1.0-sp1.x
siemens / sinec_nms 1.0 1.0.x
siemens / tia_administrator - -
siemens / sinema_server 14.0-sp2_update2 14.0-sp2_update2.x
siemens / sinumerik_opc_ua_server - -
siemens / sinec_infrastructure_network_services - 1.0.1.1
nodejs / node.js 14.0.0 14.14.0.x
nodejs / node.js 10.0.0 10.12.0.x
nodejs / node.js 12.0.0 12.12.0.x
nodejs / node.js 14.15.0 14.16.1
nodejs / node.js 12.13.0 12.22.1
nodejs / node.js 10.13.0 10.24.0.x
nodejs / node.js 15.0.0 15.14.0
Rust icon openssl-src - 111.15.0

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.