Vulnerability Database

328,409

Total vulnerabilities in the database

CVE-2015-4000

The TLS protocol 1.2 and earlier, when a DHE_EXPORT ciphersuite is enabled on a server but not on a client, does not properly convey a DHE_EXPORT choice, which allows man-in-the-middle attackers to conduct cipher-downgrade attacks by rewriting a ClientHello with DHE replaced by DHE_EXPORT and then rewriting a ServerHello with DHE_EXPORT replaced by DHE, aka the "Logjam" issue.

  • Published: May 21, 2015
  • Updated: Nov 9, 2025
  • CVE: CVE-2015-4000
  • Severity: Low
  • Exploit:

CVSS v2:

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

CWEs:

Software From Fixed in
openssl / openssl 1.0.1 1.0.1m.x
openssl / openssl 1.0.2 1.0.2a.x
canonical / ubuntu_linux 12.04 12.04.x
canonical / ubuntu_linux 14.10 14.10.x
canonical / ubuntu_linux 14.04 14.04.x
canonical / ubuntu_linux 15.04 15.04.x
openssl / openssl - 1.0.1m.x
hp / hp-ux b.11.31 b.11.31.x
ibm / content_manager 8.5 8.5.x
oracle / jrockit r28.3.6 r28.3.6.x
debian / debian_linux 8.0 8.0.x
debian / debian_linux 7.0 7.0.x
oracle / jdk 1.8.0-update_33 1.8.0-update_33.x
oracle / jre 1.7.0-update_75 1.7.0-update_75.x
oracle / jre 1.6.0-update_95 1.6.0-update_95.x
oracle / jre 1.8.0-update_45 1.8.0-update_45.x
oracle / jre 1.8.0-update_33 1.8.0-update_33.x
oracle / jre 1.7.0-update_80 1.7.0-update_80.x
oracle / jdk 1.8.0-update45 1.8.0-update45.x
oracle / jdk 1.7.0-update75 1.7.0-update75.x
oracle / jdk 1.6.0-update95 1.6.0-update95.x
oracle / jdk 1.7.0-update80 1.7.0-update80.x
suse / linux_enterprise_server 11.0-sp4 11.0-sp4.x
suse / linux_enterprise_software_development_kit 12 12.x
suse / linux_enterprise_desktop 12 12.x
suse / suse_linux_enterprise_server 12 12.x
apple / mac_os_x - 10.10.3.x
apple / iphone_os - 8.3.x
mozilla / network_security_services 3.19 3.19.x
oracle / sparc-opl_service_processor - 1121.x
mozilla / seamonkey 2.35 2.35.x
mozilla / thunderbird 38.1 38.1.x
mozilla / thunderbird 31.8 31.8.x
mozilla / firefox_os 2.2 2.2.x
mozilla / firefox 39.0 39.0.x
mozilla / firefox_esr 31.8 31.8.x
mozilla / firefox 38.1.0 38.1.0.x

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.