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| author | Kevin Cernekee <cernekee@chromium.org> | 2017-12-05 15:42:41 -0800 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2017-12-06 09:01:18 +0100 |
| commit | 916a27901de01446bcf57ecca4783f6cff493309 (patch) | |
| tree | 4c799eda5882355010e6fca6bfb478210b8012bb /tools/perf/scripts/python/stackcollapse.py | |
| parent | netfilter: xt_bpf: add overflow checks (diff) | |
| download | linux-916a27901de01446bcf57ecca4783f6cff493309.tar.gz linux-916a27901de01446bcf57ecca4783f6cff493309.zip | |
netfilter: xt_osf: Add missing permission checks
The capability check in nfnetlink_rcv() verifies that the caller
has CAP_NET_ADMIN in the namespace that "owns" the netlink socket.
However, xt_osf_fingers is shared by all net namespaces on the
system. An unprivileged user can create user and net namespaces
in which he holds CAP_NET_ADMIN to bypass the netlink_net_capable()
check:
vpnns -- nfnl_osf -f /tmp/pf.os
vpnns -- nfnl_osf -f /tmp/pf.os -d
These non-root operations successfully modify the systemwide OS
fingerprint list. Add new capable() checks so that they can't.
Signed-off-by: Kevin Cernekee <cernekee@chromium.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions