Vulnerability identifier: #VU13112

Vulnerability risk: Low

CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-3152

CWE-ID: CWE-300

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MySQL Server
Server applications / Database software

Vendor:
Oracle

Description
The vulnerability allows a remote attacker to conduct man-in-the-middle attack on the target system.

The vulnerability exists due to use of the --ssl option to mean that SSL is optional. A remote attacker can conduct man-in-the-middle attack, intercept of the communication channel between the affected app and spoof servers via a cleartext-downgrade attack, aka a "BACKRONYM" attack.

Mitigation
Update to version 5.7.3.

Vulnerable software versions

MySQL Server: 5.7 - 5.7.2, 5.6.0 - 5.6.37, 5.5.1 - 5.5.49

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External links
http://mysqlblog.fivefarmers.com/2015/04/29/ssltls-in-5-6-and-5-5-ocert-advisory/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.