# CVE-2013-0422: Multiple vulnerabilities in Oracle Java 7 before Update 11 allow remote attackers to execute arbitrary code by (1) using the public getMBean

- Severity: CVSS 9.8 (Critical), NVD
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): yes, added 2022-05-25, remediation due 2022-06-15
- Published: 2013-01-10 · Updated: 2025-10-22

## Summary

Oracle's Java software, in certain older releases, is affected by this vulnerability. Remote attackers could exploit it to run arbitrary code on a system where the affected Java software is installed.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- n/a: version range not reported

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
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  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2013-0422

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://rhn.redhat.com/errata/RHSA-2013-0156.html
- http://malware.dontneedcoffee.com/2013/01/0-day-17u10-spotted-in-while-disable.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2013:095
- http://blog.fuseyism.com/index.php/2013/01/15/security-icedtea-2-1-4-2-2-4-2-3-4-released/
- http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00025.html
- http://rhn.redhat.com/errata/RHSA-2013-0165.html
- http://www.kb.cert.org/vuls/id/625617
- http://www.us-cert.gov/cas/techalerts/TA13-010A.html
- https://partners.immunityinc.com/idocs/Java%20MBeanInstantiator.findClass%200day%20Analysis.pdf
- http://blog.fireeye.com/research/2013/01/happy-new-year-from-new-java-zero-day.html
- https://www-304.ibm.com/connections/blogs/PSIRT/entry/oracle_java_7_security_manager_bypass_vulnerability_cve_2013_04224?lang=en_us
- http://www.ubuntu.com/usn/USN-1693-1
- https://wiki.mageia.org/en/Support/Advisories/MGASA-2013-0018
- http://immunityproducts.blogspot.ca/2013/01/confirmed-java-only-fixed-one-of-two.html
- https://threatpost.com/en_us/blogs/nasty-new-java-zero-day-found-exploit-kits-already-have-it-011013
- http://seclists.org/bugtraq/2013/Jan/48
- http://www.oracle.com/technetwork/topics/security/alert-cve-2013-0422-1896849.html
- http://krebsonsecurity.com/2013/01/zero-day-java-exploit-debuts-in-crimeware/
- http://labs.alienvault.com/labs/index.php/2013/new-year-new-java-zeroday/

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