How to understand CVE security vulnerabilities
This article mainly explains "how to understand CVE security vulnerabilities". The explanation content in this article is simple and clear, easy to learn and understand. Please follow the ideas of Xiaobian slowly and deeply to study and learn "how to understand CVE security vulnerabilities" together!
Oracle Database Server Risk Matrix contains a security patch described by the following statement
This vulnerability is remotely exploitable without authentication, i.e., may be exploited over a network without requiring user credentials.
This vulnerability can be exploited remotely without authentication, for example. Can be exploited over the network without user credentials
This vulnerability is remotely exploitable without authentication
This vulnerability can be exploited remotely without authentication.
Without authentication, there is no authority, such as no DBA authority but only Create Session authority, which may bypass normal authorization and obtain DBA authority.
That is, it can bypass normal user identity or authority authentication, so it is a vulnerability.
For example, users with only query permissions can add, delete, and modify data, which is very dangerous.
For example, when a user only has EXECUTE_CATALOG_ROLE permission, the user can obtain DBA permission because of sql injection.
CVE# Component Package and/or Privilege Required
CVE-2018-2939 Core RDBMS Local Logon
CVE-2018-2841 Java VM Create Session, Create Procedure
CVE-2018-3004 Java VM Create Session, Create Procedure
CVE-2018-3004 and CVE-2018-2841, a user with only Create Session, Create Procedure permission may bypass normal permission operations and obtain higher permissions.
That is to say, if a user password is stolen or someone else uses this account, others can use this vulnerability to improve the user's permissions and then do bad things.
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