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make initrd accessible only by root

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CVE-2024-23301

Upstream PR #3123

Resolves: RHEL-21535
This commit is contained in:
Pavel Cahyna 2024-02-08 16:31:18 +01:00
parent 92b043d437
commit 4080790732
2 changed files with 36 additions and 0 deletions
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32
rear-CVE-2024-23301.patch Normal file
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@ -0,0 +1,32 @@
From 89b61793d80bc2cb2abe47a7d0549466fb087d16 Mon Sep 17 00:00:00 2001
From: Johannes Meixner <jsmeix@suse.com>
Date: Fri, 12 Jan 2024 08:04:40 +0100
Subject: [PATCH] Make initrd accessible only by root (#3123)
In pack/GNU/Linux/900_create_initramfs.sh call
chmod 0600 "$TMP_DIR/$REAR_INITRD_FILENAME"
to let only 'root' access the ReaR initrd because
the ReaR recovery system in the initrd can contain secrets
(not by default but when certain things are explicitly
configured by the user like SSH keys without passphrase)
see https://github.com/rear/rear/issues/3122
and https://bugzilla.opensuse.org/show_bug.cgi?id=1218728
---
usr/share/rear/pack/GNU/Linux/900_create_initramfs.sh | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/usr/share/rear/pack/GNU/Linux/900_create_initramfs.sh b/usr/share/rear/pack/GNU/Linux/900_create_initramfs.sh
index 1e0c11039..12be718ed 100644
--- a/usr/share/rear/pack/GNU/Linux/900_create_initramfs.sh
+++ b/usr/share/rear/pack/GNU/Linux/900_create_initramfs.sh
@@ -125,4 +125,10 @@ case "$REAR_INITRD_COMPRESSION" in
fi
;;
esac
+
+# Only root should be allowed to access the initrd
+# because the ReaR recovery system can contain secrets
+# cf. https://github.com/rear/rear/issues/3122
+test -s "$TMP_DIR/$REAR_INITRD_FILENAME" && chmod 0600 "$TMP_DIR/$REAR_INITRD_FILENAME"
+
popd >/dev/null

4
rear.spec
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@ -54,6 +54,10 @@ Patch63: rear-remove-lvmdevices-bz2145014.patch
Patch64: rear-save-lvm-poolmetadatasize-RHEL-6984.patch Patch64: rear-save-lvm-poolmetadatasize-RHEL-6984.patch
Patch65: rear-skip-useless-xfs-mount-options-RHEL-10478.patch Patch65: rear-skip-useless-xfs-mount-options-RHEL-10478.patch
# make initrd accessible only by root
# https://github.com/rear/rear/commit/89b61793d80bc2cb2abe47a7d0549466fb087d16
Patch111: rear-CVE-2024-23301.patch
# Support saving and restoring hybrid BIOS/UEFI bootloader setup and clean up bootloader detection # Support saving and restoring hybrid BIOS/UEFI bootloader setup and clean up bootloader detection
# https://github.com/rear/rear/pull/3145 # https://github.com/rear/rear/pull/3145
Patch113: rear-restore-hybrid-bootloader-RHEL-16864.patch Patch113: rear-restore-hybrid-bootloader-RHEL-16864.patch