35 lines
1.3 KiB
Diff
35 lines
1.3 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Lidong Chen <lidong.chen@oracle.com>
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Date: Fri, 22 Nov 2024 06:27:55 +0000
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Subject: [PATCH] commands/extcmd: Missing check for failed allocation
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The grub_extcmd_dispatcher() calls grub_arg_list_alloc() to allocate
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a grub_arg_list struct but it does not verify the allocation was successful.
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In case of failed allocation the NULL state pointer can be accessed in
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parse_option() through grub_arg_parse() which may lead to a security issue.
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Fixes: CVE-2024-45775
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Reported-by: Nils Langius <nils@langius.de>
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Signed-off-by: Lidong Chen <lidong.chen@oracle.com>
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Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
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Reviewed-by: Alec Brown <alec.r.brown@oracle.com>
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---
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grub-core/commands/extcmd.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/grub-core/commands/extcmd.c b/grub-core/commands/extcmd.c
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index 90a5ca24a..c236be13a 100644
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--- a/grub-core/commands/extcmd.c
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+++ b/grub-core/commands/extcmd.c
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@@ -49,6 +49,9 @@ grub_extcmd_dispatcher (struct grub_command *cmd, int argc, char **args,
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}
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state = grub_arg_list_alloc (ext, argc, args);
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+ if (state == NULL)
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+ return grub_errno;
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+
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if (grub_arg_parse (ext, argc, args, state, &new_args, &new_argc))
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{
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context.state = state;
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