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CVE-2013-2423: Oracle JRE Unspecified Vulnerability

78
Patch now
LOW 3.7EXPLOITEDREMOTEWATCHLISTDOWNGRADEMITIGATEMITIGATE

CVE-2013-2423 is a low-severity flaw (CVSS 3.7) affecting jre, ubuntu linux, opensuse, 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 Update 17 and earlier, and OpenJDK 7, allows remote attackers to affect integrity via unknown vectors related to HotSpot. NOTE: the previous information is from the April 2013 CPU. Oracle has not commented on claims from the original researcher that this vulnerability allows remote attackers to bypass permission checks by the MethodHandles method and mo

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score3.7 (Low)
Attack vectorNetwork (remote)
Attack complexityHigh
Privileges neededNone
User interactionNone
EPSS exploit chance85.2% (top 1%)
CISA exploited listYes, fix due 2022-06-15
WeaknessCWE-284
Published2013-04-17
Last modified2026-06-16
Publisher (CNA): Oracle · Vendor: canonical · opensuse · oracle

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Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

oracle jre DOWNGRADE
Affected: 1.7.0 · 1.7.0 update1 · 1.7.0 update10 · 1.7.0 update11 · 1.7.0 update13 · 1.7.0 update15 · 1.7.0 update2 · 1.7.0 update3
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.
canonical ubuntu linux MITIGATE
Affected: 12.10
Fixed in: no fixed release known
Safe to downgrade to: a release before 12.10
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
opensuse opensuse MITIGATE
Affected: 12.3
Fixed in: no fixed release known
Safe to downgrade to: a release before 12.3
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.
Fedora ELN · makedumpfile · FIXED · 1.8.0-1.eln159 · FEDORA-2026-3bf4582b1f · source
sudo dnf upgrade --advisory=FEDORA-2026-3bf4582b1f
Fedora 46 · python-resend · FIXED · 2.50.1-1.fc46 · FEDORA-2026-8c29ba68cc · source
sudo dnf upgrade --advisory=FEDORA-2026-8c29ba68cc
RHEL 5 · java-1.7.0-openjdk · FIXED · java-1.7.0-openjdk-1.7.0.19-2.3.9.1.el5_9
sudo dnf upgrade --advisory=RHSA-2013:0752 rpm -q java-1.7.0-openjdk
RHEL 6 · java-1.7.0-openjdk · FIXED · java-1.7.0-openjdk-1.7.0.19-2.3.9.1.el6_4
sudo dnf upgrade --advisory=RHSA-2013:0751 rpm -q java-1.7.0-openjdk
RHEL 5 · java-1.6.0-openjdk · NOT AFFECTED
RHEL 5 · java-1.6.0-sun · NOT AFFECTED
RHEL 6 · java-1.6.0-openjdk · NOT AFFECTED
Amazon Linux 1 · see advisory · FIXED · ALAS-2013-183 · source
sudo yum update --advisory=ALAS-2013-183

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 · 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-2013-2423?

jre: downgrade or apply the listed mitigation; ubuntu linux: mitigate or apply the listed mitigation; opensuse: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2013-2423 being exploited?

Yes. CVE-2013-2423 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.

What does CVE-2013-2423 affect?

CVE-2013-2423 affects jre, ubuntu linux, opensuse. Severity is low (CVSS 3.7). Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 Update 17 and earlier, and OpenJDK 7, allows remote attackers to affect integrity via unknown vectors related to HotSpot. NOTE: the previous info

How urgent is CVE-2013-2423?

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

Software pages

Java vulnerabilities · Ubuntu vulnerabilities

Related CVEs

References

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