Is CVE-2017-3305 being actively exploited?

It is not currently in CISA's KEV catalog. Its EPSS exploitation probability is 1%.

What products does CVE-2017-3305 affect?

Tracked products affected include MySQL. Check the version you run to see whether it is affected.

How do I fix CVE-2017-3305?

Apply the vendor fix in your normal patch cycle. An official patch or advisory is available. Upgrade affected products to a fixed version.

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CVE-2017-3305

Q: What is CVE-2017-3305?

CVE-2017-3305 is a medium-severity software vulnerability (CWE-319) with a CVSS score of 5.3. Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server: C API). Supported versions that are affected are 5.5.55 and earlier and 5.6.35 and earlier. Difficult to exploit vulnerability allows low privileged attacker

MEDIUM severity · CVSS 5.3 · CWE-319

5.3CVSS MEDIUM

Summary

Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server: C API). Supported versions that are affected are 5.5.55 and earlier and 5.6.35 and earlier. Difficult to exploit vulnerability allows low privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all MySQL Server accessible data. CVSS 3.0 Base Score 5.3 (Confidentiality impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N). NOTE: the previous information is from the April 2017 CPU. Oracle has not commented on third-party claims that this issue allows man-in-the-middle attackers to hijack the authentication of users by leveraging incorrect ordering of security parameter verification in a client, aka, "The Riddle".

Impact & exploitability

Attack vectorNetwork

Attack complexityHigh

Privileges requiredLow

User interactionNone

Confidentiality impactHigh

Integrity impactNone

Availability impactNone

Exploit probability (EPSS)1%

CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected products we track (1)

MySQL

Recommendation

Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.

Official patch: http://www.oracle.com/technetwork/security-advisory/cpuapr2017-3236618.html ↗

Additional information

NVD record
http://www.oracle.com/technetwork/security-advisory/cpuapr2017-3236618.htmlPatch
http://riddle.link/Advisory
http://www.debian.org/security/2017/dsa-3834Advisory
http://www.openwall.com/lists/oss-security/2017/03/17/3Advisory
http://www.securityfocus.com/bid/97023Advisory
http://www.securitytracker.com/id/1038287Advisory
https://access.redhat.com/errata/RHSA-2017:2787Advisory