Multiple vulnerabilities in Oracle Java 7 before Update 11 allow remote attackers to execute arbitrary code by (1) using the public getMBeanInstantiator method in the JmxMBeanServer class to obtain a reference to a private MBeanInstantiator object, then retrieving arbitrary Class references using the findClass method, and (2) using the Reflection API with recursion in a way that bypasses a security check by the java.lang.invoke.MethodHandles.Lookup.checkSecurityManager method due to the inability of the sun.reflect.Reflection.getCallerClass method to skip frames related to the new reflection API, as exploited in the wild in January 2013, as demonstrated by Blackhole and Nuclear Pack, and a different vulnerability than CVE-2012-4681 and CVE-2012-3174. NOTE: some parties have mapped the recursive Reflection API issue to CVE-2012-3174, but CVE-2012-3174 is for a different vulnerability whose details are not public as of 20130114. CVE-2013-0422 covers both the JMX/MBean and Reflection API issues. NOTE: it was originally reported that Java 6 was also vulnerable, but the reporter has retracted this claim, stating that Java 6 is not exploitable because the relevant code is called in a way that does not bypass security checks. NOTE: as of 20130114, a reliable third party has claimed that the findClass/MBeanInstantiator vector was not fixed in Oracle Java 7 Update 11. If there is still a vulnerable condition, then a separate CVE identifier might be created for the unfixed issue.
| Software | From | Fixed in |
|---|---|---|
| oracle / jre | 1.7.0-update9 | 1.7.0-update9.x |
| oracle / jdk | 1.7.0-update6 | 1.7.0-update6.x |
| oracle / jre | 1.7.0-update6 | 1.7.0-update6.x |
| oracle / jdk | 1.7.0-update5 | 1.7.0-update5.x |
| oracle / jre | 1.7.0-update3 | 1.7.0-update3.x |
| oracle / jdk | 1.7.0-update7 | 1.7.0-update7.x |
| oracle / jdk | 1.7.0-update2 | 1.7.0-update2.x |
| oracle / jdk | 1.7.0 | 1.7.0.x |
| oracle / jdk | 1.7.0-update9 | 1.7.0-update9.x |
| oracle / jre | 1.7.0-update10 | 1.7.0-update10.x |
| oracle / jre | 1.7.0-update2 | 1.7.0-update2.x |
| oracle / jdk | 1.7.0-update3 | 1.7.0-update3.x |
| oracle / jre | 1.7.0-update5 | 1.7.0-update5.x |
| oracle / jre | 1.7.0-update4 | 1.7.0-update4.x |
| oracle / jre | 1.7.0 | 1.7.0.x |
| oracle / jdk | 1.7.0-update1 | 1.7.0-update1.x |
| oracle / jre | 1.7.0-update7 | 1.7.0-update7.x |
| oracle / jdk | 1.7.0-update10 | 1.7.0-update10.x |
| oracle / jdk | 1.7.0-update4 | 1.7.0-update4.x |
| oracle / jre | 1.7.0-update1 | 1.7.0-update1.x |
| canonical / ubuntu_linux | 12.10 | 12.10.x |
| opensuse / opensuse | 12.2 | 12.2.x |
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.