Hi Serge, sorry for getting back to this so late.
On Di 08 Dez 2015 17:08:58 CET, Serge Hallyn wrote: > Quoting Mike Gabriel (mike.gabr...@das-netzwerkteam.de): >> today I worked on backporting available fixes for CVE-2015-1335 to LXC >> 0.7.x (as found in Debian squeeze-lts). >> >> The patch is attached, I am still in the testing-for-regressions phase. >> Can any of the LXC devs take a look at the patch and maybe see if it is >> suitable for Ubuntu 12.04, as well? > > Hi, > > So the thing to look for is any unconverted "mount" calls. It > looks like the lxc_setup_fs() calls to mount_fs() are not being > protected. So the contianer admin could attack through a /proc > symlink. Hmmm... ok... I just checked upstream Git and the location you refer to is not using safe_mount either there [1] Furthermore, it seems non-trivial to inform safe_mount about the root path from within lxc_init.c. Do you have any input on the following questions?: o Why mount_fs() in latest HEAD still using the mount() call instead of safe_mount()? o How could one pipe the rootfs path into lxc_setup_fs() -> mount_fs()? Thanks for any input. Mike [1] https://github.com/lxc/lxc/blob/master/src/lxc/initutils.c#L35 -- DAS-NETZWERKTEAM mike gabriel, herweg 7, 24357 fleckeby fon: +49 (1520) 1976 148 GnuPG Key ID 0x25771B31 mail: mike.gabr...@das-netzwerkteam.de, http://das-netzwerkteam.de freeBusy: https://mail.das-netzwerkteam.de/mailxchange/kronolith/fb.php?u=m.gabriel%40das-netzwerkteam.de -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/1476662 Title: lxc-start symlink vulnerabilities may allow guest to read host filesystem, interfere with apparmor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1476662/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
