OpenSSL Alternative Chains Certificate Forgery Security Bypass Vulnerability (CVE-2015-1793)
Severity: CRITICAL
CVE Identifier: CVE-2015-1793
Advisory Date: JUL 09, 2015
DESCRIPTION
A certificate forgery security bypass has been reported in OpenSSL. This is due to incorrectly implemented certificate verification in OpenSSL. An attacker could use a crafted certificate to bypass certain checks. Successful exploitation could allow a remote attacker to bypass intended access restrictions.
TREND MICRO PROTECTION INFORMATION
Vulnerability Protection in Trend Micro Deep Security protects user systems from threats that may leverage this vulnerability with the following DPI rules:
- 1006855 – OpenSSL Alternative Chains Certificate Forgery Security Bypass Vulnerability (CVE-2015-1793)
- 1006856 – OpenSSL Client Alternative Chains Certificate Forgery Security Bypass Vulnerability (CVE-2015-1793)
SOLUTION
AFFECTED SOFTWARE AND VERSION
- OpenSSL 1.0.2c
- OpenSSL 1.0.2b
- OpenSSL 1.0.1n
- OpenSSL 1.0.1o
Featured Stories
When AI Becomes a Zero-Day Machine: What Public Sector Organizations Need to KnowClaude Mythos Preview shows how AI can rapidly discover and weaponize zero-day vulnerabilities—transforming once human-scale threats into machine-speed attacks. As these capabilities spread, public sector organizations must rely on trusted, proactive defenders like TrendAI™ ZDI to stay ahead of an AI-driven threat landscape.Read more
Hunt Them All: An AI-Powered Vulnerability Sweep of 19,000 MCP ServersIn this research, we analyzed over 19,000 open-source MCP server repositories to uncover how much AI-generated code they contain and how many harbor exploitable vulnerabilities.Read more
Update on Exposed MCP Servers: The Threat Widens to the CloudExposed Model Context Protocol (MCP) servers have become powerful vectors for cloud attacks, enabling threat actors to not only access sensitive data but also take control of the cloud services themselves.Read more
Old Vulnerabilities, New AI Era, Amplified Risk: How Outdated Flaws Continue to Fuel the N-Day Exploit MarketEven as AI adoption accelerates, old exploits remain overlooked weaknesses. Underground trends show a renewed demand for exploits, with cybercriminals relying on aging but still effective vulnerabilities. We examine this blind spot and why long-standing issues need to be addressed.Read more