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-rw-r--r--meta/recipes-multimedia/libtiff/files/CVE-2017-17095.patch46
1 files changed, 46 insertions, 0 deletions
diff --git a/meta/recipes-multimedia/libtiff/files/CVE-2017-17095.patch b/meta/recipes-multimedia/libtiff/files/CVE-2017-17095.patch
new file mode 100644
index 0000000000..9b9962ed35
--- /dev/null
+++ b/meta/recipes-multimedia/libtiff/files/CVE-2017-17095.patch
@@ -0,0 +1,46 @@
1From 9171da596c88e6a2dadcab4a3a89dddd6e1b4655 Mon Sep 17 00:00:00 2001
2From: Nathan Baker <elitebadger@gmail.com>
3Date: Thu, 25 Jan 2018 21:28:15 +0000
4Subject: [PATCH] Add workaround to pal2rgb buffer overflow.
5
6CVE: CVE-2017-17095
7
8Upstream-Status: Backport (unchanged) [gitlab.com/libtiff/libtiff/commit/9171da5...]
9
10Signed-off-by: Joe Slater <joe.slater@windriver.com.
11
12---
13 tools/pal2rgb.c | 17 +++++++++++++++--
14 1 file changed, 15 insertions(+), 2 deletions(-)
15
16diff --git a/tools/pal2rgb.c b/tools/pal2rgb.c
17index 0423598..01fcf94 100644
18--- a/tools/pal2rgb.c
19+++ b/tools/pal2rgb.c
20@@ -182,8 +182,21 @@ main(int argc, char* argv[])
21 { unsigned char *ibuf, *obuf;
22 register unsigned char* pp;
23 register uint32 x;
24- ibuf = (unsigned char*)_TIFFmalloc(TIFFScanlineSize(in));
25- obuf = (unsigned char*)_TIFFmalloc(TIFFScanlineSize(out));
26+ tmsize_t tss_in = TIFFScanlineSize(in);
27+ tmsize_t tss_out = TIFFScanlineSize(out);
28+ if (tss_out / tss_in < 3) {
29+ /*
30+ * BUG 2750: The following code does not know about chroma
31+ * subsampling of JPEG data. It assumes that the output buffer is 3x
32+ * the length of the input buffer due to exploding the palette into
33+ * RGB tuples. If this assumption is incorrect, it could lead to a
34+ * buffer overflow. Go ahead and fail now to prevent that.
35+ */
36+ fprintf(stderr, "Could not determine correct image size for output. Exiting.\n");
37+ return -1;
38+ }
39+ ibuf = (unsigned char*)_TIFFmalloc(tss_in);
40+ obuf = (unsigned char*)_TIFFmalloc(tss_out);
41 switch (config) {
42 case PLANARCONFIG_CONTIG:
43 for (row = 0; row < imagelength; row++) {
44--
451.7.9.5
46