CVE-2017-3243 Denial of service in MySQL Server

What is CVE-2017-3243?

CVE-2017-3243 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 27 Jan 2017. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server: Charsets). Supported versions that are affected are 5.5.53 and earlier. Difficult to exploit vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS v3.0 Base Score 4.4 (Availability impacts).

Which versions are affected by CVE-2017-3243?

It affects 9 products.

Products include Debian Debian Linux, Mariadb Mariadb, Oracle Mysql, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Eus, Redhat Enterprise Linux Server and 3 more.

How do I fix CVE-2017-3243?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2017-3243 being exploited?

There is no known exploitation of CVE-2017-3243 in the wild and no public exploit code.

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All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2017-3243, GHSA-43gh-2c4j-x343, UBUNTU-CVE-2017-3243.