gnu: libexif: Update to 0.6.22 [security fixes].
This fixes CVE-2020-13114, CVE-2020-13113, CVE-2020-13112, CVE-2020-0093, CVE-2019-9278, and CVE-2020-12767. * gnu/packages/patches/libexif-CVE-2016-6328.patch, gnu/packages/patches/libexif-CVE-2017-7544.patch, gnu/packages/patches/libexif-CVE-2018-20030.patch: Delete files. * gnu/local.mk (dist_patch_DATA): Adjust accordingly. * gnu/packages/photo.scm (libexif): Update to 0.6.22. [source](uri): Adjust for upstream GitHub migration.master
Marius Bakke
Marius Bakke
parent
e451612602
commit
8bd0b533b3
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@ -1167,9 +1167,6 @@ dist_patch_DATA = \
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%D%/packages/patches/libbonobo-activation-test-race.patch \
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%D%/packages/patches/libcanberra-sound-theme-freedesktop.patch \
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%D%/packages/patches/libdrm-symbol-check.patch \
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%D%/packages/patches/libexif-CVE-2016-6328.patch \
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%D%/packages/patches/libexif-CVE-2017-7544.patch \
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%D%/packages/patches/libexif-CVE-2018-20030.patch \
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%D%/packages/patches/libextractor-exiv2.patch \
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%D%/packages/patches/libgeotiff-adapt-test-script-for-proj-6.2.patch \
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%D%/packages/patches/libgit2-mtime-0.patch \
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@ -1,72 +0,0 @@
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Fix CVE-2016-6328:
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https://bugzilla.redhat.com/show_bug.cgi?id=1366239
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https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6328
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Patch copied from upstream source repository:
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https://github.com/libexif/libexif/commit/41bd04234b104312f54d25822f68738ba8d7133d
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From 41bd04234b104312f54d25822f68738ba8d7133d Mon Sep 17 00:00:00 2001
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From: Marcus Meissner <marcus@jet.franken.de>
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Date: Tue, 25 Jul 2017 23:44:44 +0200
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Subject: [PATCH] fixes some (not all) buffer overreads during decoding pentax
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makernote entries.
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This should fix:
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https://sourceforge.net/p/libexif/bugs/125/ CVE-2016-6328
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---
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libexif/pentax/mnote-pentax-entry.c | 16 +++++++++++++---
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1 file changed, 13 insertions(+), 3 deletions(-)
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diff --git a/libexif/pentax/mnote-pentax-entry.c b/libexif/pentax/mnote-pentax-entry.c
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index d03d159..ea0429a 100644
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--- a/libexif/pentax/mnote-pentax-entry.c
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+++ b/libexif/pentax/mnote-pentax-entry.c
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@@ -425,24 +425,34 @@ mnote_pentax_entry_get_value (MnotePentaxEntry *entry,
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case EXIF_FORMAT_SHORT:
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{
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const unsigned char *data = entry->data;
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- size_t k, len = strlen(val);
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+ size_t k, len = strlen(val), sizeleft;
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+
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+ sizeleft = entry->size;
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for(k=0; k<entry->components; k++) {
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+ if (sizeleft < 2)
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+ break;
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vs = exif_get_short (data, entry->order);
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snprintf (val+len, maxlen-len, "%i ", vs);
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len = strlen(val);
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data += 2;
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+ sizeleft -= 2;
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}
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}
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break;
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case EXIF_FORMAT_LONG:
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{
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const unsigned char *data = entry->data;
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- size_t k, len = strlen(val);
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+ size_t k, len = strlen(val), sizeleft;
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+
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+ sizeleft = entry->size;
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for(k=0; k<entry->components; k++) {
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+ if (sizeleft < 4)
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+ break;
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vl = exif_get_long (data, entry->order);
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snprintf (val+len, maxlen-len, "%li", (long int) vl);
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len = strlen(val);
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data += 4;
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+ sizeleft -= 4;
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}
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}
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break;
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@@ -455,5 +465,5 @@ mnote_pentax_entry_get_value (MnotePentaxEntry *entry,
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break;
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}
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- return (val);
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+ return val;
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}
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--
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2.16.0
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@ -1,29 +0,0 @@
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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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@ -1,120 +0,0 @@
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https://github.com/libexif/libexif/commit/6aa11df549114ebda520dde4cdaea2f9357b2c89.patch
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NEWS section was removed
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'12' -> '30' on line 79
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From 6aa11df549114ebda520dde4cdaea2f9357b2c89 Mon Sep 17 00:00:00 2001
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From: Dan Fandrich <dan@coneharvesters.com>
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Date: Fri, 12 Oct 2018 16:01:45 +0200
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Subject: [PATCH] Improve deep recursion detection in
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exif_data_load_data_content.
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The existing detection was still vulnerable to pathological cases
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causing DoS by wasting CPU. The new algorithm takes the number of tags
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into account to make it harder to abuse by cases using shallow recursion
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but with a very large number of tags. This improves on commit 5d28011c
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which wasn't sufficient to counter this kind of case.
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The limitation in the previous fix was discovered by Laurent Delosieres,
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Secunia Research at Flexera (Secunia Advisory SA84652) and is assigned
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the identifier CVE-2018-20030.
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---
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NEWS | 1 +
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libexif/exif-data.c | 45 +++++++++++++++++++++++++++++++++++++--------
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2 files changed, 38 insertions(+), 8 deletions(-)
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diff --git a/libexif/exif-data.c b/libexif/exif-data.c
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index e35403d..a6f9c94 100644
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--- a/libexif/exif-data.c
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+++ b/libexif/exif-data.c
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@@ -35,6 +35,7 @@
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#include <libexif/olympus/exif-mnote-data-olympus.h>
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#include <libexif/pentax/exif-mnote-data-pentax.h>
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+#include <math.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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@@ -350,6 +351,20 @@ if (data->ifd[(i)]->count) { \
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break; \
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}
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+/*! Calculate the recursion cost added by one level of IFD loading.
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+ *
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+ * The work performed is related to the cost in the exponential relation
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+ * work=1.1**cost
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+ */
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+static unsigned int
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+level_cost(unsigned int n)
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+{
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+ static const double log_1_1 = 0.09531017980432493;
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+
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+ /* Adding 0.1 protects against the case where n==1 */
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+ return ceil(log(n + 0.1)/log_1_1);
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+}
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+
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/*! Load data for an IFD.
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*
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* \param[in,out] data #ExifData
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@@ -357,13 +372,13 @@ if (data->ifd[(i)]->count) { \
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* \param[in] d pointer to buffer containing raw IFD data
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* \param[in] ds size of raw data in buffer at \c d
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* \param[in] offset offset into buffer at \c d at which IFD starts
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- * \param[in] recursion_depth number of times this function has been
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- * recursively called without returning
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+ * \param[in] recursion_cost factor indicating how expensive this recursive
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+ * call could be
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*/
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static void
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exif_data_load_data_content (ExifData *data, ExifIfd ifd,
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const unsigned char *d,
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- unsigned int ds, unsigned int offset, unsigned int recursion_depth)
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+ unsigned int ds, unsigned int offset, unsigned int recursion_cost)
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{
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ExifLong o, thumbnail_offset = 0, thumbnail_length = 0;
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ExifShort n;
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@@ -378,9 +393,20 @@ exif_data_load_data_content (ExifData *data, ExifIfd ifd,
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if ((((int)ifd) < 0) || ( ((int)ifd) >= EXIF_IFD_COUNT))
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return;
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- if (recursion_depth > 30) {
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+ if (recursion_cost > 170) {
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+ /*
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+ * recursion_cost is a logarithmic-scale indicator of how expensive this
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+ * recursive call might end up being. It is an indicator of the depth of
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+ * recursion as well as the potential for worst-case future recursive
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+ * calls. Since it's difficult to tell ahead of time how often recursion
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+ * will occur, this assumes the worst by assuming every tag could end up
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+ * causing recursion.
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+ * The value of 170 was chosen to limit typical EXIF structures to a
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+ * recursive depth of about 6, but pathological ones (those with very
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+ * many tags) to only 2.
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+ */
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exif_log (data->priv->log, EXIF_LOG_CODE_CORRUPT_DATA, "ExifData",
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- "Deep recursion detected!");
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+ "Deep/expensive recursion detected!");
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return;
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}
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@@ -422,15 +448,18 @@ exif_data_load_data_content (ExifData *data, ExifIfd ifd,
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switch (tag) {
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case EXIF_TAG_EXIF_IFD_POINTER:
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CHECK_REC (EXIF_IFD_EXIF);
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- exif_data_load_data_content (data, EXIF_IFD_EXIF, d, ds, o, recursion_depth + 1);
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+ exif_data_load_data_content (data, EXIF_IFD_EXIF, d, ds, o,
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+ recursion_cost + level_cost(n));
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break;
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case EXIF_TAG_GPS_INFO_IFD_POINTER:
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CHECK_REC (EXIF_IFD_GPS);
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- exif_data_load_data_content (data, EXIF_IFD_GPS, d, ds, o, recursion_depth + 1);
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+ exif_data_load_data_content (data, EXIF_IFD_GPS, d, ds, o,
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+ recursion_cost + level_cost(n));
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break;
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case EXIF_TAG_INTEROPERABILITY_IFD_POINTER:
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CHECK_REC (EXIF_IFD_INTEROPERABILITY);
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- exif_data_load_data_content (data, EXIF_IFD_INTEROPERABILITY, d, ds, o, recursion_depth + 1);
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+ exif_data_load_data_content (data, EXIF_IFD_INTEROPERABILITY, d, ds, o,
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+ recursion_cost + level_cost(n));
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break;
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case EXIF_TAG_JPEG_INTERCHANGE_FORMAT:
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thumbnail_offset = o;
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@ -206,17 +206,17 @@ cameras (CRW/CR2, NEF, RAF, DNG, and others).")
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(define-public libexif
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(package
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(name "libexif")
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(version "0.6.21")
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(version "0.6.22")
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(source (origin
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(method url-fetch)
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(uri (string-append "mirror://sourceforge/libexif/libexif/"
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version "/libexif-" version ".tar.bz2"))
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(patches (search-patches "libexif-CVE-2016-6328.patch"
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"libexif-CVE-2017-7544.patch"
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"libexif-CVE-2018-20030.patch"))
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(uri (string-append
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"https://github.com/libexif/libexif/releases"
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"/download/libexif-"
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(string-map (lambda (x) (if (char=? x #\.) #\_ x)) version)
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"-release/libexif-" version ".tar.xz"))
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(sha256
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(base32
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"06nlsibr3ylfwp28w8f5466l6drgrnydgxrm4jmxzrmk5svaxk8n"))))
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"0mhcad5zab7fsn120rd585h8ncwkq904nzzrq8vcd72hzk4g2j2h"))))
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(build-system gnu-build-system)
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(home-page "https://libexif.github.io/")
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(synopsis "Read and manipulate EXIF data in digital photographs")
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