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 Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1829055 Title: CVE-2019-11815 Status in linux package in Ubuntu: Confirmed Status in linux package in Debian: Fix Released Bug description: An issue was discovered in rds_tcp_kill_sock in net/rds/tcp.c in the Linux kernel before 5.0.8. There is a race condition leading to a use- after-free, related to net namespace cleanup. This is a remotely exploitable bug, and seems to be relevant for all current versions of ubuntu, including LTS ones. Debian CVE : https://security- tracker.debian.org/tracker/CVE-2019-11815 Fixed by: https://git.kernel.org/linus/cb66ddd156203daefb8d71158036b27b0e2caf63 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1829055/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
