CVE-2012-5076
Published: March 28, 2022
Official Description
The default Java security properties configuration did not restrict access to the com.sun.org.glassfish.external and com.sun.org.glassfish.gmbal packages. An untrusted Java application or applet could use these flaws to bypass Java sandbox restrictions.
CISA KEV Advisory
Oracle Java SE Sandbox Bypass Vulnerability
The default Java security properties configuration did not restrict access to the com.sun.org.glassfish.external and com.sun.org.glassfish.gmbal packages. An untrusted Java application or applet could use these flaws to bypass Java sandbox restrictions.
Apply updates per vendor instructions.
Risk Analysis
This vulnerability in Java's default security configuration allows untrusted Java applications or applets to bypass sandbox restrictions. It is a high-severity flaw with a very high EPSS score of 0.91710, indicating a high probability of exploitation, and is confirmed to be actively exploited.
Active exploitation of this vulnerability has been observed in the wild. This flaw allows for sandbox bypass, which is a critical security concern.
It is crucial to update Java Runtime Environment to a patched version to prevent untrusted applications from bypassing security restrictions.
Technical Analysis
CVE-2012-5076 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2012-5076 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2012-5076 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1