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CVE-2017-3241: Vulnerability in the Java SE, Java SE Embedded, JRockit component of Oracle Java SE (subcomponent: RMI)

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This week
CRITICAL 9.0REMOTEDOWNGRADEDOWNGRADEDOWNGRADE

CVE-2017-3241 is a critical-severity flaw (CVSS 9.0) affecting jdk, jre, jrockit. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Vulnerability in the Java SE, Java SE Embedded, JRockit component of Oracle Java SE (subcomponent: RMI). Supported versions that are affected are Java SE: 6u131, 7u121 and 8u112; Java SE Embedded: 8u111; JRockit: R28.3.12. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE, Java SE Embedded, JRockit. While the vulnerability is in Java SE, Java SE Embedded, JRockit, a

Why this priority

  • Critical severity
  • EPSS top 2%: very likely to be exploited
  • Public exploit reference
  • Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score9.0 (Critical)
Attack vectorNetwork (remote)
Attack complexityHigh
Privileges neededNone
User interactionNone
EPSS exploit chance32.8% (top 2%)
CISA exploited listNo
WeaknessCWE-20
Published2017-01-27
Last modified2026-06-17
Publisher (CNA): Oracle · Vendor: oracle

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Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

oracle jdk DOWNGRADE
Affected: 1.6 update_131 · 1.7 update_121 · 1.8 update_111 · 1.8 update_112
Fixed in: no fixed release known
Safe to downgrade to: a release before 1.6
1. Check installed version
apt-cache policy jdk || rpm -q jdk || jdk --version
2. No fixed release: DOWNGRADE to a release before 1.6 (Debian / Ubuntu)
apt-cache madison jdk sudo apt install jdk=<VERSION_BEFORE_1.6> sudo apt-mark hold jdk
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list jdk sudo dnf downgrade jdk-<VERSION_BEFORE_1.6> sudo dnf versionlock add jdk
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 jre DOWNGRADE
Affected: 1.6 update_131 · 1.7 update_121 · 1.8 update_111 · 1.8 update_112
Fixed in: no fixed release known
Safe to downgrade to: a release before 1.6
1. Check installed version
apt-cache policy jre || rpm -q jre || jre --version
2. No fixed release: DOWNGRADE to a release before 1.6 (Debian / Ubuntu)
apt-cache madison jre sudo apt install jre=<VERSION_BEFORE_1.6> sudo apt-mark hold jre
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list jre sudo dnf downgrade jre-<VERSION_BEFORE_1.6> 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 jrockit DOWNGRADE
Affected: r28.3.12
Fixed in: no fixed release known
Safe to downgrade to: a release before r28.3.12
1. Check installed version
apt-cache policy jrockit || rpm -q jrockit || jrockit --version
2. No fixed release: DOWNGRADE to a release before r28.3.12 (Debian / Ubuntu)
apt-cache madison jrockit sudo apt install jrockit=<VERSION_BEFORE_r28.3.12> sudo apt-mark hold jrockit
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list jrockit sudo dnf downgrade jrockit-<VERSION_BEFORE_r28.3.12> sudo dnf versionlock add jrockit
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.

Public exploits and detection

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

Verify at the official source NVD · CVE Program · 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-2017-3241?

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

Is CVE-2017-3241 being exploited?

CVE-2017-3241 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2017-3241 affect?

CVE-2017-3241 affects jdk, jre, jrockit. Severity is critical (CVSS 9.0). Vulnerability in the Java SE, Java SE Embedded, JRockit component of Oracle Java SE (subcomponent: RMI). Supported versions that are affected are Java SE: 6u131, 7u121 and 8u112; Java SE Embedded: 8u111; JRockit: R28.3.12. Difficult to expl

How urgent is CVE-2017-3241?

Priority 66/100. Critical severity; EPSS top 2%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

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