The DBD::mysql module through 4.043 for Perl uses the mysql_ssl=1 setting to mean that SSL is optional (even though this setting's documentation has a "your communication with the server will be encrypted" statement), which allows man-in-the-middle attackers to spoof servers via a cleartext-downgrade attack, a related issue to CVE-2015-3152.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2017-10789 from the MITRE CVE dictionary dictionary and NIST NVD.
Red Hat Product Security has rated this issue as having Moderate security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
| CVSS3 Base Score | 6.8 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N |
| Attack Vector | Network |
| Attack Complexity | High |
| Privileges Required | None |
| User Interaction | Required |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity Impact | High |
| Availability Impact | None |
| Platform | Package | State |
|---|---|---|
| Red Hat Software Collections for Red Hat Enterprise Linux | rh-perl520-perl-DBD-MySQL | Will not fix |
| Red Hat Software Collections for Red Hat Enterprise Linux | rh-perl524-perl-DBD-MySQL | Will not fix |
| Red Hat Enterprise Linux 7 | perl-DBD-MySQL | Will not fix |
| Red Hat Enterprise Linux 6 | perl-DBD-MySQL | Will not fix |
| Red Hat Enterprise Linux 5 | perl-DBD-MySQL | Will not fix |
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