blob: e2d136f587e2c9615c93fac9c92bcf2ed9fef211 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
From a1c933dabd0e1c54a412f3f84ae0aa58115c6067 Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Thu, 24 Feb 2022 22:26:02 +0100
Subject: [PATCH] tif_jbig.c: fix crash when reading a file with multiple IFD
in memory-mapped mode and when bit reversal is needed (fixes #385)
CVE: CVE-2022-0865
Upstream-Status: Backport [https://sources.debian.org/src/tiff/4.1.0+git191117-2%7Edeb10u4/debian/patches/CVE-2022-0865.patch/]
Signed-off-by: Ranjitsinh Rathod <ranjitsinh.rathod@kpit.com>
Comment: No change in any hunk
---
libtiff/tif_jbig.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/libtiff/tif_jbig.c b/libtiff/tif_jbig.c
index 74086338..8bfa4cef 100644
--- a/libtiff/tif_jbig.c
+++ b/libtiff/tif_jbig.c
@@ -208,6 +208,16 @@ int TIFFInitJBIG(TIFF* tif, int scheme)
*/
tif->tif_flags |= TIFF_NOBITREV;
tif->tif_flags &= ~TIFF_MAPPED;
+ /* We may have read from a previous IFD and thus set TIFF_BUFFERMMAP and
+ * cleared TIFF_MYBUFFER. It is necessary to restore them to their initial
+ * value to be consistent with the state of a non-memory mapped file.
+ */
+ if (tif->tif_flags&TIFF_BUFFERMMAP) {
+ tif->tif_rawdata = NULL;
+ tif->tif_rawdatasize = 0;
+ tif->tif_flags &= ~TIFF_BUFFERMMAP;
+ tif->tif_flags |= TIFF_MYBUFFER;
+ }
/* Setup the function pointers for encode, decode, and cleanup. */
tif->tif_setupdecode = JBIGSetupDecode;
--
GitLab
|
