/usr/share/maven-repo/com/ is in libactivation-java 1.2.0-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/maven-repo/com/sun/
/usr/share/maven-repo/com/sun/activation/
/usr/share/maven-repo/com/sun/activation/all/
/usr/share/maven-repo/com/sun/activation/all/1.2.0/
/usr/share/maven-repo/com/sun/activation/all/1.2.0/all-1.2.0.pom
/usr/share/maven-repo/com/sun/activation/all/debian/
/usr/share/maven-repo/com/sun/activation/all/debian/all-debian.pom
/usr/share/maven-repo/com/sun/activation/javax.activation/
/usr/share/maven-repo/com/sun/activation/javax.activation/1.2.0/
/usr/share/maven-repo/com/sun/activation/javax.activation/1.2.0/javax.activation-1.2.0.jar
/usr/share/maven-repo/com/sun/activation/javax.activation/1.2.0/javax.activation-1.2.0.pom
/usr/share/maven-repo/com/sun/activation/javax.activation/debian/
/usr/share/maven-repo/com/sun/activation/javax.activation/debian/javax.activation-debian.jar
/usr/share/maven-repo/com/sun/activation/javax.activation/debian/javax.activation-debian.pom