Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.
A command injection flaw was discovered in the source code build phase because of the “go get” command, which does not block -fplugin= and -plugin arguments.
A remote attacker could entice a user to process a repository containing maliciously-crafted build instructions using “go get”, resulting in the execution of arbitrary code with the privileges of the process.
There is no known workaround at this time.
All Go users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=dev-lang/go-1.9.4"