mirror of
https://git.in.rschanz.org/ryan77627/guix.git
synced 2024-11-15 11:25:22 -05:00
8dbfaff028
* gnu/packages/patches/libtiff-CVE-2018-8905.patch, gnu/packages/patches/libtiff-CVE-2018-10963.patch: New files. * gnu/local.mk (dist_patch_DATA): Add them. * gnu/packages/image.scm (libtiff)[replacement]: New field. (libtiff/fixed): New variable.
61 lines
1.7 KiB
Diff
61 lines
1.7 KiB
Diff
Fix CVE-2018-8095:
|
|
|
|
http://bugzilla.maptools.org/show_bug.cgi?id=2780
|
|
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-8905
|
|
|
|
Patch copied from upstream source repository:
|
|
|
|
https://gitlab.com/libtiff/libtiff/commit/58a898cb4459055bb488ca815c23b880c242a27d
|
|
|
|
From 58a898cb4459055bb488ca815c23b880c242a27d Mon Sep 17 00:00:00 2001
|
|
From: Even Rouault <even.rouault@spatialys.com>
|
|
Date: Sat, 12 May 2018 15:32:31 +0200
|
|
Subject: [PATCH] LZWDecodeCompat(): fix potential index-out-of-bounds write.
|
|
Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2780 / CVE-2018-8905
|
|
|
|
The fix consists in using the similar code LZWDecode() to validate we
|
|
don't write outside of the output buffer.
|
|
---
|
|
libtiff/tif_lzw.c | 18 ++++++++++++------
|
|
1 file changed, 12 insertions(+), 6 deletions(-)
|
|
|
|
diff --git a/libtiff/tif_lzw.c b/libtiff/tif_lzw.c
|
|
index 4ccb443c..94d85e38 100644
|
|
--- a/libtiff/tif_lzw.c
|
|
+++ b/libtiff/tif_lzw.c
|
|
@@ -602,6 +602,7 @@ LZWDecodeCompat(TIFF* tif, uint8* op0, tmsize_t occ0, uint16 s)
|
|
char *tp;
|
|
unsigned char *bp;
|
|
int code, nbits;
|
|
+ int len;
|
|
long nextbits, nextdata, nbitsmask;
|
|
code_t *codep, *free_entp, *maxcodep, *oldcodep;
|
|
|
|
@@ -753,13 +754,18 @@ LZWDecodeCompat(TIFF* tif, uint8* op0, tmsize_t occ0, uint16 s)
|
|
} while (--occ);
|
|
break;
|
|
}
|
|
- assert(occ >= codep->length);
|
|
- op += codep->length;
|
|
- occ -= codep->length;
|
|
- tp = op;
|
|
+ len = codep->length;
|
|
+ tp = op + len;
|
|
do {
|
|
- *--tp = codep->value;
|
|
- } while( (codep = codep->next) != NULL );
|
|
+ int t;
|
|
+ --tp;
|
|
+ t = codep->value;
|
|
+ codep = codep->next;
|
|
+ *tp = (char)t;
|
|
+ } while (codep && tp > op);
|
|
+ assert(occ >= len);
|
|
+ op += len;
|
|
+ occ -= len;
|
|
} else {
|
|
*op++ = (char)code;
|
|
occ--;
|
|
--
|
|
2.17.0
|
|
|