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@@ -0,0 +1,37 @@
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+From 2c34af908ebf4856051ed29e46d88abd2b20387f Mon Sep 17 00:00:00 2001
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+From: Daniel Axtens <dja@axtens.net>
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+Date: Fri, 8 Mar 2024 22:47:20 +1100
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+Subject: [PATCH] video/readers/jpeg: Do not permit duplicate SOF0 markers in
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+ JPEG
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+
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+Otherwise a subsequent header could change the height and width
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+allowing future OOB writes.
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+
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+Fixes: CVE-2024-45774
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+
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+Reported-by: Nils Langius <nils@langius.de>
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+Signed-off-by: Daniel Axtens <dja@axtens.net>
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+Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
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+
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+CVE: CVE-2024-45774
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+Upstream-Status: Backport [https://git.savannah.gnu.org/cgit/grub.git/commit/?id=2c34af908ebf4856051ed29e46d88abd2b20387f]
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+Signed-off-by: Peter Marko <peter.marko@siemens.com>
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+---
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+ grub-core/video/readers/jpeg.c | 4 ++++
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+ 1 file changed, 4 insertions(+)
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+
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+diff --git a/grub-core/video/readers/jpeg.c b/grub-core/video/readers/jpeg.c
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+index ae634fd41..631a89356 100644
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+--- a/grub-core/video/readers/jpeg.c
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++++ b/grub-core/video/readers/jpeg.c
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+@@ -339,6 +339,10 @@ grub_jpeg_decode_sof (struct grub_jpeg_data *data)
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+ if (grub_errno != GRUB_ERR_NONE)
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+ return grub_errno;
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+
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++ if (data->image_height != 0 || data->image_width != 0)
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++ return grub_error (GRUB_ERR_BAD_FILE_TYPE,
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++ "jpeg: cannot have duplicate SOF0 markers");
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++
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+ if (grub_jpeg_get_byte (data) != 8)
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+ return grub_error (GRUB_ERR_BAD_FILE_TYPE,
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+ "jpeg: only 8-bit precision is supported");
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