Oracle Java 7 Security Manager Bypass Remote Code Execution
CVE-2013-0422 is a client-side remote code execution vulnerability in Oracle Java 7 before Update 11. The CVE covers multiple flaws that can be used to escape the Java sandbox in untrusted applet or Java Web Start contexts. The published details describe two principal vectors: (1) abuse of the public getMBeanInstantiator method in JmxMBeanServer to obtain a reference to a private MBeanInstantiator object and then use its findClass method to retrieve arbitrary Class references, and (2) misuse of the Reflection API with recursion to bypass a security check in java.lang.invoke.MethodHandles.Lookup.checkSecurityManager because sun.reflect.Reflection.getCallerClass does not correctly skip frames associated with the newer reflection API. Successful exploitation allows attacker-supplied Java content delivered via a malicious web page or JNLP/Web Start application to break out of the sandbox and execute arbitrary code on the target system. The vulnerability was exploited in the wild in January 2013 and was incorporated into exploit kits including Blackhole and Nuclear.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A 2013 vulnerability broadly adopted by exploit kits, indicating exploit availability and in-the-wild use.
A Java vulnerability used by the CottonCastle exploit kit in a similar infection chain as other Java exploits, associated with the same malware family as prior Corkow deliveries.
A vulnerability added to the Impact Exploit Kit as of 2013-01-13, indicating ongoing exploit kit updates to include newly weaponized flaws.
A Java Runtime Environment (JRE) vulnerability referenced as an exploit vector within the Evercookie storage/respawning technique list (i.e., cited as a persistence mechanism via a Java exploit).
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.