This bug is awaiting verification that the linux/5.11.0-41.45 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-hirsute' to 'verification-done-hirsute'. If the problem still exists, change the tag 'verification-needed-hirsute' to 'verification-failed-hirsute'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: verification-needed-focal -- 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/1949516 Title: require CAP_NET_ADMIN to attach N_HCI ldisc Status in linux package in Ubuntu: In Progress Status in linux source package in Bionic: Fix Committed Status in linux source package in Focal: Fix Committed Status in linux source package in Hirsute: Fix Committed Status in linux source package in Impish: Fix Committed Status in linux source package in Jammy: In Progress Bug description: [Impact] Any unprivileged user can attach N_HCI ldisc and send packets coming from a virtual controller by using PTYs. This exposes attack surface on systems where bluetooth is not needed or even allow local attacks that would otherwise require physical proximity. [Test case] Try attaching N_HCI ldisc to a tty. ldattach HCI /dev/tty [Potential regression] Users who rely on programs using N_HCI line discipline in order to emulate or proxy a bluetooth controller will require privilege they may not have. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1949516/+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
