CVE-2014-0224: OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h does not properly restrict processing of

This week

HIGH 7.4REMOTEWATCHLISTUPGRADEDOWNGRADEDOWNGRADE

CVE-2014-0224 is a high-severity flaw (CVSS 7.4) affecting openssl, jboss enterprise application platform, jboss enterprise web platform. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h does not properly restrict processing of ChangeCipherSpec messages, which allows man-in-the-middle attackers to trigger use of a zero-length master key in certain OpenSSL-to-OpenSSL communications, and consequently hijack sessions or obtain sensitive information, via a crafted TLS handshake, aka the "CCS Injection" vulnerability.

Why this priority

High severity
EPSS top 1%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.4 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	95.3% (top 1%)
CISA exploited list	No
Weakness	CWE-326
Published	2014-06-05
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: fedoraproject · openssl · redhat

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

Am I affected?

Timeline

2014-06-05 21:55 UTCPublished CVE record published
2026-06-17 00:02 UTCUpdated Record last modified

openssl openssl UPGRADE

Affected: < 0.9.8za · >= 1.0.0 and < 1.0.0m · >= 1.0.1 and < 1.0.1h

Fixed in: 0.9.8za, 1.0.0m, 1.0.1h

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 0.9.8za (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade openssl

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade openssl

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

redhat jboss enterprise application platform DOWNGRADE

Affected: 5.2.0 · 6.2.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.2.0

1. Check installed version

apt-cache policy jboss-enterprise-application-platform || rpm -q jboss-enterprise-application-platform || jboss-enterprise-application-platform --version

2. No fixed release: DOWNGRADE to a release before 5.2.0 (Debian / Ubuntu)

apt-cache madison jboss-enterprise-application-platform sudo apt install jboss-enterprise-application-platform=<VERSION_BEFORE_5.2.0> sudo apt-mark hold jboss-enterprise-application-platform

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

dnf --showduplicates list jboss-enterprise-application-platform sudo dnf downgrade jboss-enterprise-application-platform-<VERSION_BEFORE_5.2.0> sudo dnf versionlock add jboss-enterprise-application-platform

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.

redhat jboss enterprise web platform DOWNGRADE

Affected: 5.2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.2.0

1. Check installed version

apt-cache policy jboss-enterprise-web-platform || rpm -q jboss-enterprise-web-platform || jboss-enterprise-web-platform --version

2. No fixed release: DOWNGRADE to a release before 5.2.0 (Debian / Ubuntu)

apt-cache madison jboss-enterprise-web-platform sudo apt install jboss-enterprise-web-platform=<VERSION_BEFORE_5.2.0> sudo apt-mark hold jboss-enterprise-web-platform

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

dnf --showduplicates list jboss-enterprise-web-platform sudo dnf downgrade jboss-enterprise-web-platform-<VERSION_BEFORE_5.2.0> sudo dnf versionlock add jboss-enterprise-web-platform

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.

redhat jboss enterprise web server DOWNGRADE

Affected: 2.0.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0.1

1. Check installed version

apt-cache policy jboss-enterprise-web-server || rpm -q jboss-enterprise-web-server || jboss-enterprise-web-server --version

2. No fixed release: DOWNGRADE to a release before 2.0.1 (Debian / Ubuntu)

apt-cache madison jboss-enterprise-web-server sudo apt install jboss-enterprise-web-server=<VERSION_BEFORE_2.0.1> sudo apt-mark hold jboss-enterprise-web-server

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

dnf --showduplicates list jboss-enterprise-web-server sudo dnf downgrade jboss-enterprise-web-server-<VERSION_BEFORE_2.0.1> sudo dnf versionlock add jboss-enterprise-web-server

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.

redhat storage DOWNGRADE

Affected: 2.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.1 (Debian / Ubuntu)

apt-cache madison storage sudo apt install storage=<VERSION_BEFORE_2.1> sudo apt-mark hold storage

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

dnf --showduplicates list storage sudo dnf downgrade storage-<VERSION_BEFORE_2.1> sudo dnf versionlock add storage

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.

fedoraproject fedora MITIGATE

Affected: 19 · 20

Fixed in: no fixed release known

Safe to downgrade to: a release before 19

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.

Public exploits and detection

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

Metasploit: OpenSSL Server-Side ChangeCipherSpec Injection Scanner

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-2014-0224?

openssl: upgrade to 0.9.8za, 1.0.0m, 1.0.1h; jboss enterprise application platform: downgrade or apply the listed mitigation; jboss enterprise web platform: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2014-0224 being exploited?

CVE-2014-0224 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-2014-0224 affect?

CVE-2014-0224 affects openssl, jboss enterprise application platform, jboss enterprise web platform. Severity is high (CVSS 7.4). OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h does not properly restrict processing of ChangeCipherSpec messages, which allows man-in-the-middle attackers to trigger use of a zero-length master key in certain OpenSSL-

How urgent is CVE-2014-0224?

Priority 66/100. High severity; EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

Software pages

OpenSSL vulnerabilities · JBoss and WildFly vulnerabilities

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References

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