rds is also blocked by default in ubuntu, via the /etc/modprobe.d /blacklist-rare-network.conf configuration file.
# rds alias net-pf-21 off It's also not entirely clear that this is actually remotely exploitable, as network namespace exit is normally a local action, which is what would trigger a cleanup. NVD's CVSS score (https://nvd.nist.gov/vuln/detail/CVE-2019-11815) claims the vulnerability is network accessible (which is the basis for a couple of the news articles going around), but e.g. SUSE considers it local access only (see https://www.suse.com/security/cve/CVE-2019-11815/). ** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2019-11815 ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed ** Changed in: linux (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1829055 Title: CVE-2019-11815 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1829055/+subscriptions -- ubuntu-bugs mailing list email@example.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs