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CVE-2017-3645

15
FAUCET Score

CVE-2017-3645 is a denial-of-service vulnerability affecting Oracle MySQL Server versions 5.7.18 and earlier, specifically within the Optimizer subcomponent. This vulnerability allows a high-privileged attacker with network access to cause a complete and repeatable crash of the MySQL Server. With a CVSS 3.0 score of 4.9 (Medium), it requires high privileges but has low attack complexity. There is no public exploit code available, nor is there evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.7.18CPE matchmatch criteria
cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

4.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.45%
Probability of exploitation in next 30 days
EPSS Percentile
82.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0245 is in the 93rd percentile among its peer group of 3,563 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

oraclepatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: rh-mysql57-mysql-0:5.7.19-6.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUSFixed in: rh-mysql57-mysql-0:5.7.19-6.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-mysql57-mysql-0:5.7.19-6.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUSFixed in: rh-mysql57-mysql-0:5.7.19-6.el7
View patch

Vendor Advisories (1)

redhatCVE-2017-3645Moderate

mysql: Server: Optimizer unspecified vulnerability (CPU Jul 2017)

Jul 19, 2017

References

access.redhat.com / errata/RHSA-2017:2886
oracle.com / technetwork/security-advisory/cpujul2017-3236622.html
PatchVendor Advisory
securityfocus.com / bid/99783
Third Party AdvisoryVDB Entry
securitytracker.com / id/1038928
Third Party AdvisoryVDB Entry