void-packages/srcpkgs/libexif/patches/CVE-2017-7544.patch

30 lines
1.0 KiB
Diff

From c39acd1692023b26290778a02a9232c873f9d71a Mon Sep 17 00:00:00 2001
From: Marcus Meissner <marcus@jet.franken.de>
Date: Tue, 25 Jul 2017 23:38:56 +0200
Subject: [PATCH] On saving makernotes, make sure the makernote container tags
has a type with 1 byte components.
Fixes (at least):
https://sourceforge.net/p/libexif/bugs/130
https://sourceforge.net/p/libexif/bugs/129
---
libexif/exif-data.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/libexif/exif-data.c b/libexif/exif-data.c
index 67df4db..91f4c33 100644
--- a/libexif/exif-data.c
+++ b/libexif/exif-data.c
@@ -255,6 +255,12 @@ exif_data_save_data_entry (ExifData *data, ExifEntry *e,
exif_mnote_data_set_offset (data->priv->md, *ds - 6);
exif_mnote_data_save (data->priv->md, &e->data, &e->size);
e->components = e->size;
+ if (exif_format_get_size (e->format) != 1) {
+ /* e->format is taken from input code,
+ * but we need to make sure it is a 1 byte
+ * entity due to the multiplication below. */
+ e->format = EXIF_FORMAT_UNDEFINED;
+ }
}
}