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30 lines
955 B
Diff
30 lines
955 B
Diff
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Fix CVE-2017-7544:
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https://sourceforge.net/p/libexif/bugs/130/
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https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7544
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Patch copied from upstream bug tracker:
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https://sourceforge.net/p/libexif/bugs/130/#489a
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Index: libexif/exif-data.c
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===================================================================
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RCS file: /cvsroot/libexif/libexif/libexif/exif-data.c,v
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retrieving revision 1.131
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diff -u -r1.131 exif-data.c
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--- a/libexif/exif-data.c 12 Jul 2012 17:28:26 -0000 1.131
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+++ b/libexif/exif-data.c 25 Jul 2017 21:34:06 -0000
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@@ -255,6 +255,12 @@
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exif_mnote_data_set_offset (data->priv->md, *ds - 6);
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exif_mnote_data_save (data->priv->md, &e->data, &e->size);
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e->components = e->size;
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+ if (exif_format_get_size (e->format) != 1) {
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+ /* e->format is taken from input code,
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+ * but we need to make sure it is a 1 byte
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+ * entity due to the multiplication below. */
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+ e->format = EXIF_FORMAT_UNDEFINED;
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+ }
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}
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}
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