CVE-2013-0431: Oracle JRE Sandbox Bypass Vulnerability

Patch now

LOW 3.7EXPLOITEDREMOTEDOWNGRADEDOWNGRADE

CVE-2013-0431 is a low-severity flaw (CVSS 3.7) affecting jre, openjdk, reported as exploited in the wild. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 through Update 11, and OpenJDK 7, allows user-assisted remote attackers to bypass the Java security sandbox via unspecified vectors related to JMX, aka "Issue 52," a different vulnerability than CVE-2013-1490.

Why this priority

EPSS top 1%: very likely to be exploited
Exploited in the wild (CISA KEV)
Used in ransomware campaigns
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	3.7 (Low)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	90.1% (top 1%)
CISA exploited list	Yes, fix due 2022-06-15, used in ransomware
Weakness	CWE-693
Published	2013-01-31
Last modified	2026-10-02

Publisher (CNA): Oracle · Vendor: oracle

Last updated 2026-10-02 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2013-01-31 14:55 UTCPublished CVE record published
2022-05-25Exploited Added to the CISA Known Exploited Vulnerabilities list
2022-06-15Deadline CISA due date for US federal agencies to patch
2026-10-02 14:55 UTCUpdated Record last modified

oracle jre DOWNGRADE

Affected: 1.7.0 · 1.7.0 update1 · 1.7.0 update10 · 1.7.0 update11 · 1.7.0 update2 · 1.7.0 update3 · 1.7.0 update4 · 1.7.0 update5

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.7.0

1. Check installed version

apt-cache policy jre || rpm -q jre || jre --version

2. No fixed release: DOWNGRADE to a release before 1.7.0 (Debian / Ubuntu)

apt-cache madison jre sudo apt install jre=<VERSION_BEFORE_1.7.0> sudo apt-mark hold jre

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list jre sudo dnf downgrade jre-<VERSION_BEFORE_1.7.0> sudo dnf versionlock add jre

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

oracle openjdk DOWNGRADE

Affected: 7

Fixed in: no fixed release known

Safe to downgrade to: a release before 7

1. Check installed version

apt-cache policy openjdk || rpm -q openjdk || openjdk --version

2. No fixed release: DOWNGRADE to a release before 7 (Debian / Ubuntu)

apt-cache madison openjdk sudo apt install openjdk=<VERSION_BEFORE_7> sudo apt-mark hold openjdk

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list openjdk sudo dnf downgrade openjdk-<VERSION_BEFORE_7> sudo dnf versionlock add openjdk

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · beakerlib · FIXED · 1.33.4-1.fc46 · FEDORA-2026-e95a8fc2ef · source

sudo dnf upgrade --advisory=FEDORA-2026-e95a8fc2ef

Fedora ELN · createrepo_c · FIXED · 1.2.6-1.eln159 · FEDORA-2026-8bb3ba60b2 · source

sudo dnf upgrade --advisory=FEDORA-2026-8bb3ba60b2

RHEL 5 · java-1.7.0-openjdk · FIXED · java-1.7.0-openjdk-1.7.0.9-2.3.5.3.el5_9

sudo dnf upgrade --advisory=RHSA-2013:0247 rpm -q java-1.7.0-openjdk

RHEL 6 · java-1.7.0-openjdk · FIXED · java-1.7.0-openjdk-1.7.0.9-2.3.5.3.el6_3

sudo dnf upgrade --advisory=RHSA-2013:0247 rpm -q java-1.7.0-openjdk

RHEL 5 · java-1.4.2-ibm · DEFERRED

RHEL 5 · java-1.5.0-ibm · NOT AFFECTED

RHEL 5 · java-1.6.0-ibm · NOT AFFECTED

Amazon Linux 1 · see advisory · FIXED · ALAS-2013-156 · source

sudo yum update --advisory=ALAS-2013-156

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Java Applet JMX - Remote Code Execution (Metasploit) (2)
Metasploit: Java Applet JMX Remote Code Execution

Verify at the official source NVD · CVE Program · CISA KEV catalog · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2013-0431?

jre: downgrade or apply the listed mitigation; openjdk: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2013-0431 being exploited?

Yes. CVE-2013-0431 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.

What does CVE-2013-0431 affect?

CVE-2013-0431 affects jre, openjdk. Severity is low (CVSS 3.7). Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 through Update 11, and OpenJDK 7, allows user-assisted remote attackers to bypass the Java security sandbox via unspecified vectors related to JMX

How urgent is CVE-2013-0431?

Priority 78/100. EPSS top 1%: very likely to be exploited; Exploited in the wild (CISA KEV); Used in ransomware campaigns; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

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References

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