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-rw-r--r--gnu/packages/patches/gst-plugins-good-flic-bounds-check.patch319
1 files changed, 0 insertions, 319 deletions
diff --git a/gnu/packages/patches/gst-plugins-good-flic-bounds-check.patch b/gnu/packages/patches/gst-plugins-good-flic-bounds-check.patch
deleted file mode 100644
index f77dca2cd6..0000000000
--- a/gnu/packages/patches/gst-plugins-good-flic-bounds-check.patch
+++ /dev/null
@@ -1,319 +0,0 @@
-Fix CVE-2016-{9634,9635,9636}.
-
-https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9634
-https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9635
-https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9636
-
-This fixes upstream bug #774834 (flic decoder: Buffer overflow in
-flx_decode_delta_fli):
-
-https://bugzilla.gnome.org/show_bug.cgi?id=774834
-
-Patch copied from upstream source repository:
-
-https://cgit.freedesktop.org/gstreamer/gst-plugins-good/commit/?id=2e203a79b7d9af4029307c1a845b3c148d5f5e62
-
-From 2e203a79b7d9af4029307c1a845b3c148d5f5e62 Mon Sep 17 00:00:00 2001
-From: Matthew Waters <matthew@centricular.com>
-Date: Tue, 22 Nov 2016 19:05:00 +1100
-Subject: [PATCH] flxdec: add some write bounds checking
-
-Without checking the bounds of the frame we are writing into, we can
-write off the end of the destination buffer.
-
-https://scarybeastsecurity.blogspot.dk/2016/11/0day-exploit-advancing-exploitation.html
-
-https://bugzilla.gnome.org/show_bug.cgi?id=774834
----
- gst/flx/gstflxdec.c | 116 +++++++++++++++++++++++++++++++++++++++++-----------
- 1 file changed, 91 insertions(+), 25 deletions(-)
-
-diff --git a/gst/flx/gstflxdec.c b/gst/flx/gstflxdec.c
-index 604be2f..d51a8e6 100644
---- a/gst/flx/gstflxdec.c
-+++ b/gst/flx/gstflxdec.c
-@@ -74,9 +74,9 @@ static gboolean gst_flxdec_src_query_handler (GstPad * pad, GstObject * parent,
- GstQuery * query);
-
- static void flx_decode_color (GstFlxDec *, guchar *, guchar *, gint);
--static void flx_decode_brun (GstFlxDec *, guchar *, guchar *);
--static void flx_decode_delta_fli (GstFlxDec *, guchar *, guchar *);
--static void flx_decode_delta_flc (GstFlxDec *, guchar *, guchar *);
-+static gboolean flx_decode_brun (GstFlxDec *, guchar *, guchar *);
-+static gboolean flx_decode_delta_fli (GstFlxDec *, guchar *, guchar *);
-+static gboolean flx_decode_delta_flc (GstFlxDec *, guchar *, guchar *);
-
- #define rndalign(off) ((off) + ((off) & 1))
-
-@@ -203,13 +203,14 @@ gst_flxdec_sink_event_handler (GstPad * pad, GstObject * parent,
- return ret;
- }
-
--static void
-+static gboolean
- flx_decode_chunks (GstFlxDec * flxdec, gulong count, guchar * data,
- guchar * dest)
- {
- FlxFrameChunk *hdr;
-+ gboolean ret = TRUE;
-
-- g_return_if_fail (data != NULL);
-+ g_return_val_if_fail (data != NULL, FALSE);
-
- while (count--) {
- hdr = (FlxFrameChunk *) data;
-@@ -228,17 +229,17 @@ flx_decode_chunks (GstFlxDec * flxdec, gulong count, guchar * data,
- break;
-
- case FLX_BRUN:
-- flx_decode_brun (flxdec, data, dest);
-+ ret = flx_decode_brun (flxdec, data, dest);
- data += rndalign (hdr->size) - FlxFrameChunkSize;
- break;
-
- case FLX_LC:
-- flx_decode_delta_fli (flxdec, data, dest);
-+ ret = flx_decode_delta_fli (flxdec, data, dest);
- data += rndalign (hdr->size) - FlxFrameChunkSize;
- break;
-
- case FLX_SS2:
-- flx_decode_delta_flc (flxdec, data, dest);
-+ ret = flx_decode_delta_flc (flxdec, data, dest);
- data += rndalign (hdr->size) - FlxFrameChunkSize;
- break;
-
-@@ -256,7 +257,12 @@ flx_decode_chunks (GstFlxDec * flxdec, gulong count, guchar * data,
- data += rndalign (hdr->size) - FlxFrameChunkSize;
- break;
- }
-+
-+ if (!ret)
-+ break;
- }
-+
-+ return ret;
- }
-
-
-@@ -289,13 +295,13 @@ flx_decode_color (GstFlxDec * flxdec, guchar * data, guchar * dest, gint scale)
- }
- }
-
--static void
-+static gboolean
- flx_decode_brun (GstFlxDec * flxdec, guchar * data, guchar * dest)
- {
- gulong count, lines, row;
- guchar x;
-
-- g_return_if_fail (flxdec != NULL);
-+ g_return_val_if_fail (flxdec != NULL, FALSE);
-
- lines = flxdec->hdr.height;
- while (lines--) {
-@@ -313,12 +319,21 @@ flx_decode_brun (GstFlxDec * flxdec, guchar * data, guchar * dest)
- if (count > 0x7f) {
- /* literal run */
- count = 0x100 - count;
-+ if ((glong) row - count < 0) {
-+ GST_ERROR_OBJECT (flxdec, "Invalid BRUN packet detected.");
-+ return FALSE;
-+ }
- row -= count;
-
- while (count--)
- *dest++ = *data++;
-
- } else {
-+ if ((glong) row - count < 0) {
-+ GST_ERROR_OBJECT (flxdec, "Invalid BRUN packet detected.");
-+ return FALSE;
-+ }
-+
- /* replicate run */
- row -= count;
- x = *data++;
-@@ -328,22 +343,28 @@ flx_decode_brun (GstFlxDec * flxdec, guchar * data, guchar * dest)
- }
- }
- }
-+
-+ return TRUE;
- }
-
--static void
-+static gboolean
- flx_decode_delta_fli (GstFlxDec * flxdec, guchar * data, guchar * dest)
- {
- gulong count, packets, lines, start_line;
- guchar *start_p, x;
-
-- g_return_if_fail (flxdec != NULL);
-- g_return_if_fail (flxdec->delta_data != NULL);
-+ g_return_val_if_fail (flxdec != NULL, FALSE);
-+ g_return_val_if_fail (flxdec->delta_data != NULL, FALSE);
-
- /* use last frame for delta */
- memcpy (dest, flxdec->delta_data, flxdec->size);
-
- start_line = (data[0] + (data[1] << 8));
- lines = (data[2] + (data[3] << 8));
-+ if (start_line + lines > flxdec->hdr.height) {
-+ GST_ERROR_OBJECT (flxdec, "Invalid FLI packet detected. too many lines.");
-+ return FALSE;
-+ }
- data += 4;
-
- /* start position of delta */
-@@ -356,7 +377,8 @@ flx_decode_delta_fli (GstFlxDec * flxdec, guchar * data, guchar * dest)
-
- while (packets--) {
- /* skip count */
-- dest += *data++;
-+ guchar skip = *data++;
-+ dest += skip;
-
- /* RLE count */
- count = *data++;
-@@ -364,12 +386,24 @@ flx_decode_delta_fli (GstFlxDec * flxdec, guchar * data, guchar * dest)
- if (count > 0x7f) {
- /* literal run */
- count = 0x100 - count;
-- x = *data++;
-
-+ if (skip + count > flxdec->hdr.width) {
-+ GST_ERROR_OBJECT (flxdec, "Invalid FLI packet detected. "
-+ "line too long.");
-+ return FALSE;
-+ }
-+
-+ x = *data++;
- while (count--)
- *dest++ = x;
-
- } else {
-+ if (skip + count > flxdec->hdr.width) {
-+ GST_ERROR_OBJECT (flxdec, "Invalid FLI packet detected. "
-+ "line too long.");
-+ return FALSE;
-+ }
-+
- /* replicate run */
- while (count--)
- *dest++ = *data++;
-@@ -378,21 +412,27 @@ flx_decode_delta_fli (GstFlxDec * flxdec, guchar * data, guchar * dest)
- start_p += flxdec->hdr.width;
- dest = start_p;
- }
-+
-+ return TRUE;
- }
-
--static void
-+static gboolean
- flx_decode_delta_flc (GstFlxDec * flxdec, guchar * data, guchar * dest)
- {
- gulong count, lines, start_l, opcode;
- guchar *start_p;
-
-- g_return_if_fail (flxdec != NULL);
-- g_return_if_fail (flxdec->delta_data != NULL);
-+ g_return_val_if_fail (flxdec != NULL, FALSE);
-+ g_return_val_if_fail (flxdec->delta_data != NULL, FALSE);
-
- /* use last frame for delta */
- memcpy (dest, flxdec->delta_data, flxdec->size);
-
- lines = (data[0] + (data[1] << 8));
-+ if (lines > flxdec->hdr.height) {
-+ GST_ERROR_OBJECT (flxdec, "Invalid FLC packet detected. too many lines.");
-+ return FALSE;
-+ }
- data += 2;
-
- start_p = dest;
-@@ -405,9 +445,15 @@ flx_decode_delta_flc (GstFlxDec * flxdec, guchar * data, guchar * dest)
- while ((opcode = (data[0] + (data[1] << 8))) & 0xc000) {
- data += 2;
- if ((opcode & 0xc000) == 0xc000) {
-- /* skip count */
-- start_l += (0x10000 - opcode);
-- dest += flxdec->hdr.width * (0x10000 - opcode);
-+ /* line skip count */
-+ gulong skip = (0x10000 - opcode);
-+ if (skip > flxdec->hdr.height) {
-+ GST_ERROR_OBJECT (flxdec, "Invalid FLC packet detected. "
-+ "skip line count too big.");
-+ return FALSE;
-+ }
-+ start_l += skip;
-+ dest += flxdec->hdr.width * skip;
- } else {
- /* last pixel */
- dest += flxdec->hdr.width;
-@@ -419,7 +465,8 @@ flx_decode_delta_flc (GstFlxDec * flxdec, guchar * data, guchar * dest)
- /* last opcode is the packet count */
- while (opcode--) {
- /* skip count */
-- dest += *data++;
-+ guchar skip = *data++;
-+ dest += skip;
-
- /* RLE count */
- count = *data++;
-@@ -427,12 +474,25 @@ flx_decode_delta_flc (GstFlxDec * flxdec, guchar * data, guchar * dest)
- if (count > 0x7f) {
- /* replicate word run */
- count = 0x100 - count;
-+
-+ if (skip + count > flxdec->hdr.width) {
-+ GST_ERROR_OBJECT (flxdec, "Invalid FLC packet detected. "
-+ "line too long.");
-+ return FALSE;
-+ }
-+
- while (count--) {
- *dest++ = data[0];
- *dest++ = data[1];
- }
- data += 2;
- } else {
-+ if (skip + count > flxdec->hdr.width) {
-+ GST_ERROR_OBJECT (flxdec, "Invalid FLC packet detected. "
-+ "line too long.");
-+ return FALSE;
-+ }
-+
- /* literal word run */
- while (count--) {
- *dest++ = *data++;
-@@ -442,6 +502,8 @@ flx_decode_delta_flc (GstFlxDec * flxdec, guchar * data, guchar * dest)
- }
- lines--;
- }
-+
-+ return TRUE;
- }
-
- static GstFlowReturn
-@@ -571,9 +633,13 @@ gst_flxdec_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
- out = gst_buffer_new_and_alloc (flxdec->size * 4);
-
- /* decode chunks */
-- flx_decode_chunks (flxdec,
-- ((FlxFrameType *) chunk)->chunks,
-- chunk + FlxFrameTypeSize, flxdec->frame_data);
-+ if (!flx_decode_chunks (flxdec,
-+ ((FlxFrameType *) chunk)->chunks,
-+ chunk + FlxFrameTypeSize, flxdec->frame_data)) {
-+ GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
-+ ("%s", "Could not decode chunk"), NULL);
-+ return GST_FLOW_ERROR;
-+ }
-
- /* save copy of the current frame for possible delta. */
- memcpy (flxdec->delta_data, flxdec->frame_data, flxdec->size);
---
-2.10.2
-
generated by cgit v1.2.3 (git 2.45.0) at 2024-12-11 08:21:14 +0000