Posté par: igor51 le juillet 18, 2019, 13:00:06
In our analysis, we observed that a user account with less privilege can gain administrator rights over the automation server if jobs are built on the master machine (i.e., the main Jenkins server), a setup enabled by default. An exploit for this can be easily written using shell spawn — a default build step. If an exploit is successfully deployed, an attacker can perform remote code execution (RCE) on the master, which can result to Jenkins being completely overwritten.
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Source: Jenkins Admins: Relying on Default Settings Could Put Master at Risk of Remote Code Execution Attacks (http://feeds.trendmicro.com/~r/Anti-MalwareBlog/~3/PObGTrIqU0M/)