| Package | Affected versions | Patched versions |
|---|---|---|
| org.scala-sbt:io_2.12 | ≥ 1.0.0, < 1.9.7 | 1.9.7 |
| org.scala-sbt:io_2.13 | ≥ 1.0.0, < 1.9.7 | 1.9.7 |
| org.scala-sbt:io_3 | ≥ 1.0.0, < 1.9.7 | 1.9.7 |
| org.scala-sbt:sbt | ≥ 0.3.4, < 1.9.7 | 1.9.7 |
| io | ≥ 1.0.0, < 1.9.7 | 1.9.7 |
| sbt | ≥ 0.3.4, < 1.9.7 | 1.9.7 |
Given specially crafted zip or JAR file, IO.unzip allows writing of arbitrary file. The follow is an example of a malicious entry:
+2018-04-15 22:04:42 ..... 20 20 ../../../../../../root/.ssh/authorized_keys
This would have a potential to overwrite /root/.ssh/authorized_keys. Within sbt's main code, IO.unzip is used in pullRemoteCache task and Resolvers.remote; however many projects use IO.unzip(...) directly to implement custom tasks - https://github.com/search?q=IO.unzip+language%3AScala&type=code&l=Scala&p=1
The problem has been patched in https://github.com/sbt/io/pull/360 sbt 1.9.7 is available with the fix.
A workaround might be use some other library to unzip.
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