From 4c34815784e9ffda5733225c7d95824f96375e36 Mon Sep 17 00:00:00 2001 From: Simon McVittie Date: Wed, 1 Sep 2021 14:19:31 +0100 Subject: [PATCH] run: Block setns() If we don't allow unshare() or clone() with CLONE_NEWUSER, we also shouldn't allow joining an existing (but different) namespace. Partially fixes GHSA-67h7-w3jq-vh4q. Signed-off-by: Simon McVittie Conflict:NA Reference:https://github.com/flatpak/flatpak/commit/4c34815784e9ffda5733225c7d95824f96375e36 --- common/flatpak-run.c | 1 + 1 file changed, 1 insertion(+) diff --git a/common/flatpak-run.c b/common/flatpak-run.c index 2781694..c266dbe 100644 --- a/common/flatpak-run.c +++ b/common/flatpak-run.c @@ -2819,6 +2819,7 @@ setup_seccomp (FlatpakBwrap *bwrap, /* Don't allow subnamespace setups: */ {SCMP_SYS (unshare), EPERM}, + {SCMP_SYS (setns), EPERM}, {SCMP_SYS (mount), EPERM}, {SCMP_SYS (pivot_root), EPERM}, #if defined(__s390__) || defined(__s390x__) || defined(__CRIS__) -- 2.27.0