Vulnerability CVE-2017-11364
Published: 2017-08-02

Description:
The CMS installer in Joomla! before 3.7.4 does not verify a user's ownership of a webspace, which allows remote authenticated users to gain control of the target application by leveraging Certificate Transparency logs.

CVSS2 => (AV:N/AC:L/Au:S/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.5/10
6.4/10
8/10
Exploit range
Attack complexity
Authentication
Remote
Low
Single time
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Joomla -> Joomla! 

 References:
http://www.securitytracker.com/id/1039015
https://developer.joomla.org/security-centre/700-20170704-core-installer-lack-of-ownership-verification.html
https://media.defcon.org/DEF%20CON%2025/DEF%20CON%2025%20presentations/DEFCON-25-Hanno-Boeck-Abusing-Certificate-Transparency-Logs.pdf
https://twitter.com/hanno/status/890281330906247168
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