forked from pool/grub2
Michael Chang
cda3e9a045
* grub2-bls-loader-entry-oneshot.patch OBS-URL: https://build.opensuse.org/package/show/Base:System/grub2?expand=0&rev=550
33 lines
1.0 KiB
Diff
33 lines
1.0 KiB
Diff
From d5a155864230964878280a52dc82392382af1c5d Mon Sep 17 00:00:00 2001
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From: Maxim Suhanov <dfirblog@gmail.com>
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Date: Thu, 8 May 2025 19:02:13 +0200
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Subject: [PATCH 7/8] disk/cryptodisk: Wipe the passphrase from memory
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Switching to another EFI boot application while there are secrets in
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RAM is dangerous, because not all firmware is wiping memory on free.
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To reduce the attack surface, wipe the passphrase acquired when
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unlocking an encrypted volume.
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Signed-off-by: Maxim Suhanov <dfirblog@gmail.com>
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Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
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---
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grub-core/disk/cryptodisk.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/grub-core/disk/cryptodisk.c b/grub-core/disk/cryptodisk.c
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index f9ae750f85..cb87d337ac 100644
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--- a/grub-core/disk/cryptodisk.c
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+++ b/grub-core/disk/cryptodisk.c
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@@ -1251,6 +1251,7 @@ grub_cryptodisk_scan_device_real (const char *name,
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#endif
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if (askpass)
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{
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+ grub_memset (cargs->key_data, 0, cargs->key_len);
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cargs->key_len = 0;
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grub_free (cargs->key_data);
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}
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--
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2.49.0
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