Bash Vulnerability Shellshock (CVE-2014-6271)
DESCRIPTION
This vulnerability, which is found existing in certain versions of GNU Bourne Again Shell (Bash) can allow an attacker to execute commands on an affected system. It allows for remote code execution on servers that run these Linux distributions. Bash is used by most Unix and Linux systems, as well as OS X. This vulnerability was reportedly being exploited in the wild already. Trend Micro spotted samples, which are actual payload of the said exploit code. Trend Micro detects this as ELF_BASHLITE.A.
All versions of Bash up to and including version 4.3 are vulnerable.
TREND MICRO PROTECTION INFORMATION
Trend Micro Deep Discovery protects network connections via the following rule:
- CVE-2014-6271-SHELLSHOCK_REQUEST
Trend Micro Deep Discovery also has the following DDI rule:
- 1618 – Shellshock HTTP REQUEST
Trend Micro Deep Security protects users from this threat via the following update (DSRU14-028) and rule:
- 1006256 – GNU Bash Remote Code Execution Vulnerability
SOLUTION
OTHER INFORMATION
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Old Vulnerabilities, New AI Era, Amplified Risk: How Outdated Flaws Continue to Fuel the N-Day Exploit MarketEven as AI adoption accelerates, old exploits remain overlooked weaknesses.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