rpms/libexif
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Prevent infinite recursion

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This commit is contained in:
Matthias Clasen 2005-05-06 18:29:45 +00:00
parent f18224aa48
commit eab3779160
2 changed files with 75 additions and 0 deletions

70
libexif-0.6.12-recurse.patch Normal file
View File

@ -0,0 +1,70 @@
--- libexif-0.6.12/libexif/exif-data.c.recurse 2005-05-06 13:35:17.610294000 -0400
+++ libexif-0.6.12/libexif/exif-data.c 2005-05-06 13:37:35.112654000 -0400
@@ -284,9 +284,10 @@
}
static void
-exif_data_load_data_content (ExifData *data, ExifContent *ifd,
- const unsigned char *d,
- unsigned int ds, unsigned int offset)
+exif_data_load_data_content_recurse (ExifData *data, ExifContent *ifd,
+ const unsigned char *d,
+ unsigned int ds, unsigned int offset,
+ unsigned int level)
{
ExifLong o, thumbnail_offset = 0, thumbnail_length = 0;
ExifShort n;
@@ -296,6 +297,13 @@
if (!data || !data->priv) return;
+ if (level > 150)
+ {
+ exif_log (data->priv->log, EXIF_LOG_CODE_CORRUPT_DATA, "ExifData",
+ "Deep recursion in exif_data_load_data_content");
+ return 0;
+ }
+
/* Read the number of entries */
if (offset >= ds - 1) return;
n = exif_get_short (d + offset, data->priv->order);
@@ -320,18 +328,18 @@
switch (tag) {
case EXIF_TAG_EXIF_IFD_POINTER:
CHECK_REC (EXIF_IFD_EXIF);
- exif_data_load_data_content (data,
- data->ifd[EXIF_IFD_EXIF], d, ds, o);
+ exif_data_load_data_content_recurse (data,
+ data->ifd[EXIF_IFD_EXIF], d, ds, o, level + 1);
break;
case EXIF_TAG_GPS_INFO_IFD_POINTER:
CHECK_REC (EXIF_IFD_GPS);
- exif_data_load_data_content (data,
- data->ifd[EXIF_IFD_GPS], d, ds, o);
+ exif_data_load_data_content_recurse (data,
+ data->ifd[EXIF_IFD_GPS], d, ds, o, level + 1);
break;
case EXIF_TAG_INTEROPERABILITY_IFD_POINTER:
CHECK_REC (EXIF_IFD_INTEROPERABILITY);
- exif_data_load_data_content (data,
- data->ifd[EXIF_IFD_INTEROPERABILITY], d, ds, o);
+ exif_data_load_data_content_recurse (data,
+ data->ifd[EXIF_IFD_INTEROPERABILITY], d, ds, o, level + 1);
break;
case EXIF_TAG_JPEG_INTERCHANGE_FORMAT:
thumbnail_offset = o;
@@ -373,6 +381,14 @@
}
static void
+exif_data_load_data_content (ExifData *data, ExifContent *ifd,
+ const unsigned char *d,
+ unsigned int ds, unsigned int offset)
+{
+ exif_data_load_data_content_recurse (data, ifd, d, ds, offset, 0);
+}
+
+static void
exif_data_save_data_content (ExifData *data, ExifContent *ifd,
unsigned char **d, unsigned int *ds,
unsigned int offset)

5
libexif.spec
View File

@ -11,6 +11,7 @@ BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-buildroot
Patch0: libexif-0.6.12-gcc4.patch
# fixed in libexif CVS
Patch1: libexif-0.6.12-odd.patch
Patch2: libexif-0.6.12-recurse.patch
%description
Most digital cameras produce EXIF files, which are JPEG files with
@ -30,6 +31,7 @@ for writing programs that use libexif.
%setup -q
%patch0 -p1 -b .gcc4
%patch1 -p1 -b .odd
%patch2 -p1 -b .recurse
%build
%configure
@ -61,6 +63,9 @@ rm -rf $RPM_BUILD_ROOT
%{_libdir}/pkgconfig/libexif.pc
%changelog
* Fri May 6 2005 Matthias Clasen <mclasen@redhat.com>
- Prevent infinite recursion (#156365)
* Sun Apr 24 2005 Matthias Clasen <mclasen@redhat.com>
- Fix MakerNote handling (#153282)