36 lines
1.1 KiB
Diff
36 lines
1.1 KiB
Diff
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From 1330662f33a55e88bfe18e76de28b7922d91a999 Mon Sep 17 00:00:00 2001
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From: Simon McVittie <smcv@collabora.com>
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Date: Wed, 1 Sep 2021 14:20:29 +0100
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Subject: [PATCH] run: Don't allow unmounting filesystems
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If we don't allow mounting filesystems, we shouldn't allow unmounting
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either.
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Partially fixes GHSA-67h7-w3jq-vh4q.
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Signed-off-by: Simon McVittie <smcv@collabora.com>
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Conflict:NA
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Reference:https://github.com/flatpak/flatpak/commit/1330662f33a55e88bfe18e76de28b7922d91a999
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---
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common/flatpak-run.c | 2 ++
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1 file changed, 2 insertions(+)
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diff --git a/common/flatpak-run.c b/common/flatpak-run.c
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index c266dbe..b1a8db5 100644
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--- a/common/flatpak-run.c
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+++ b/common/flatpak-run.c
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@@ -2821,6 +2821,8 @@ setup_seccomp (FlatpakBwrap *bwrap,
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{SCMP_SYS (unshare), EPERM},
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{SCMP_SYS (setns), EPERM},
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{SCMP_SYS (mount), EPERM},
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+ {SCMP_SYS (umount), EPERM},
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+ {SCMP_SYS (umount2), EPERM},
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{SCMP_SYS (pivot_root), EPERM},
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#if defined(__s390__) || defined(__s390x__) || defined(__CRIS__)
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/* Architectures with CONFIG_CLONE_BACKWARDS2: the child stack
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--
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2.27.0
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