Ant is a Java-based build tool similar to ‘make’ that uses XML configuration files.
A previous fix for a security vulnerability involving insecure temporary files has been found to be incomplete.
A local attacker could perform symlink attacks to overwrite arbitrary files with the privileges of the user running the application.
There is no known workaround at this time.
All Apache Ant users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-java/ant-1.10.9"