A privilege escalation vulnerability (CVE-2017-15288) has been identified in the Scala compilation daemon.
We recommend upgrading to the latest versions of Scala (Scala 2.12.4, Scala 2.11.12 or Scala 2.10.7).
The compile daemon is started explicitly by the
fsc command, or implicitly by executing
a Scala source file as a script (e.g
scala MyScript.scala). The Scala REPL, started by
scala is not affected as it does not use the compilation daemon, nor is running a pre-compiled class using the
While the compile daemon is running, an attacker with local access to the machine can
execute code as the user that started the compile daemon, and can write arbitrary
class files to any location on the filesystem that the user has access to.
- Scala 2.1.6-2.10.6; 2.11.0-2.11.11; 2.12.0-2.12.3
scala -nocompdaemon MyScript.scala rather than
scala MyScript.scala to
disable the implicit startup and use of the daemon.
- Avoid explicitly starting
- Upgrade to Scala 2.10.7 2.11.12, 2.12.4 or higher which restricts the sensitive file to be
readable only by the owner. These releases also change the location of the sensitive
file: it is written in the directory