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CVE-2014-3470: The ssl3_send_client_key_exchange function in s3_clnt.c in OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.

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MEDIUM 4.3WATCHLISTUPGRADEDOWNGRADEMITIGATE

CVE-2014-3470 is a medium-severity flaw (CVSS 4.3) affecting openssl, storage, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The ssl3_send_client_key_exchange function in s3_clnt.c in OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h, when an anonymous ECDH cipher suite is used, allows remote attackers to cause a denial of service (NULL pointer dereference and client crash) by triggering a NULL certificate value.

Why this priority

  • EPSS top 1%: very likely to be exploited
  • On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score4.3 (Medium)
EPSS exploit chance85.8% (top 1%)
CISA exploited listNo
WeaknessCWE-476
Published2014-06-05
Last modified2026-06-17
Publisher (CNA): Red Hat, Inc. · Vendor: fedoraproject · mariadb · openssl · opensuse · redhat

Share: LinkedIn · X · Reddit

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

Am I affected?

Timeline

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 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: all versions · 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.
redhat enterprise linux MITIGATE
Affected: 5 · 6.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 5
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.
mariadb mariadb UPGRADE
Affected: >= 10.0.0 and < 10.0.13
Fixed in: 10.0.13
Safe to downgrade to: a release before 10.0.0
1. Check installed version
apt-cache policy mariadb || rpm -q mariadb || mariadb --version
2. UPGRADE to 10.0.13 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade mariadb
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade mariadb
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 10.0.0 (Debian / Ubuntu)
apt-cache madison mariadb sudo apt install mariadb=<VERSION_BEFORE_10.0.0> sudo apt-mark hold mariadb
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list mariadb sudo dnf downgrade mariadb-<VERSION_BEFORE_10.0.0> sudo dnf versionlock add mariadb
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.
opensuse leap MITIGATE
Affected: 42.1
Fixed in: no fixed release known
Safe to downgrade to: a release before 42.1
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.
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-2014-3470?

openssl: upgrade to 0.9.8za, 1.0.0m, 1.0.1h; storage: downgrade or apply the listed mitigation; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2014-3470 being exploited?

CVE-2014-3470 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-2014-3470 affect?

CVE-2014-3470 affects openssl, storage, fedora. Severity is medium (CVSS 4.3). The ssl3_send_client_key_exchange function in s3_clnt.c in OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h, when an anonymous ECDH cipher suite is used, allows remote attackers to cause a denial of service (NULL pointer

How urgent is CVE-2014-3470?

Priority 45/100. EPSS top 1%: very likely to be exploited; On your watchlist

Software pages

OpenSSL vulnerabilities · MariaDB vulnerabilities

Related CVEs

References

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