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CVE-2014-6492: Java's Toxic Relationship: Inside CVE-2014-6492

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Java's Toxic Relationship: Inside CVE-2014-6492

Vulnerability ID: CVE-2014-6492
CVSS Score: 7.6
Published: 2014-10-15

Back in 2014, the browser landscape was a wild west of plugins, and Oracle's Java SE was the sheriff with a rusty badge. CVE-2014-6492 represents a critical, albeit cryptic, vulnerability in the Java Deployment component that specifically targeted Firefox users. Unlike generic Java exploits that sprayed attacks across all browsers, this one exploited the unique way Firefox's NPAPI (Netscape Plugin API) implementation talked to the Java Virtual Machine (JVM). It allowed a remote attacker to bypass the Java Sandbox entirely, escalating from a simple drive-by web visit to full remote code execution (RCE) with the privileges of the victim.

TL;DR

A high-severity vulnerability in the Oracle Java SE Deployment component affecting Firefox. By exploiting the NPAPI bridge, attackers could escape the Java sandbox and execute arbitrary code on the host system. Patched in October 2014.

⚠️ Exploit Status: POC

Technical Details

  • CWE ID: CWE-119
  • Attack Vector: Network
  • CVSS v2.0: 7.6 (High)
  • Impact: Confidentiality, Integrity, Availability (Complete)
  • Exploit Status: POC-limited
  • EPSS Score: 1.38%

Affected Systems

  • Oracle Java SE 8u20 and earlier
  • Oracle Java SE 7u67 and earlier
  • Oracle Java SE 6u81 and earlier
  • Mozilla Firefox (running on Windows/Linux/Solaris)
  • Java SE 8: <= 8u20 (Fixed in: 8u25)
  • Java SE 7: <= 7u67 (Fixed in: 7u71)
  • Java SE 6: <= 6u81 (Fixed in: 6u85)

Mitigation Strategies

  • Disable Java Plugin in Firefox (legacy systems)
  • Enable 'Click-to-Play' or 'Ask to Activate' for plugins
  • Implement Deployment Rule Sets (DRS) to whitelist trusted applets
  • Network segmentation for legacy machines requiring Java

Remediation Steps:

  1. Identify all endpoints running Java SE 6, 7, or 8.
  2. Upgrade Oracle Java SE 8 to version 8u25 or later.
  3. Upgrade Oracle Java SE 7 to version 7u71 or later.
  4. Upgrade Oracle Java SE 6 to version 6u85 or later.
  5. If patching is impossible, remove the Java plugin from the Firefox 'Add-ons' manager.

References

Read the full report for CVE-2014-6492 on our website for more details including interactive diagrams and full exploit analysis.

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