SOURCES: libtiff-lzw-bugs.patch (NEW) - fix LZW decoding vulnerabilities (C...

[draenog]

Author: draenog                      Date: Fri Sep  5 13:57:11 2008 GMT
Module: SOURCES                       Tag: HEAD
---- Log message:
- fix LZW decoding vulnerabilities (CVE-2008-2327); taken from Fedora

---- Files affected:
SOURCES:
   libtiff-lzw-bugs.patch (NONE -> 1.1)  (NEW)

---- Diffs:

================================================================
Index: SOURCES/libtiff-lzw-bugs.patch
diff -u /dev/null SOURCES/libtiff-lzw-bugs.patch:1.1
--- /dev/null	Fri Sep  5 15:57:11 2008
+++ SOURCES/libtiff-lzw-bugs.patch	Fri Sep  5 15:57:05 2008
@@ -0,0 +1,58 @@
+Fixes for CVE-2008-2327
+
+
+diff -Naur tiff-3.8.2.orig/libtiff/tif_lzw.c tiff-3.8.2/libtiff/tif_lzw.c
+--- tiff-3.8.2.orig/libtiff/tif_lzw.c	2006-03-21 11:42:50.000000000 -0500
++++ tiff-3.8.2/libtiff/tif_lzw.c	2008-08-22 16:26:01.000000000 -0400
+@@ -237,6 +237,11 @@
+                     sp->dec_codetab[code].length = 1;
+                     sp->dec_codetab[code].next = NULL;
+                 } while (code--);
++		/*
++		 * Zero-out the unused entries
++		 */
++		_TIFFmemset(&sp->dec_codetab[CODE_CLEAR], 0,
++			    (CODE_FIRST-CODE_CLEAR)*sizeof (code_t));
+ 	}
+ 	return (1);
+ }
+@@ -408,12 +413,19 @@
+ 			break;
+ 		if (code == CODE_CLEAR) {
+ 			free_entp = sp->dec_codetab + CODE_FIRST;
++			_TIFFmemset(free_entp, 0, (CSIZE-CODE_FIRST)*sizeof (code_t));
+ 			nbits = BITS_MIN;
+ 			nbitsmask = MAXCODE(BITS_MIN);
+ 			maxcodep = sp->dec_codetab + nbitsmask-1;
+ 			NextCode(tif, sp, bp, code, GetNextCode);
+ 			if (code == CODE_EOI)
+ 				break;
++			if (code == CODE_CLEAR) {
++				TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
++				"LZWDecode: Corrupted LZW table at scanline %d",
++				tif->tif_row);
++				return (0);
++			}
+ 			*op++ = (char)code, occ--;
+ 			oldcodep = sp->dec_codetab + code;
+ 			continue;
+@@ -604,12 +616,19 @@
+ 			break;
+ 		if (code == CODE_CLEAR) {
+ 			free_entp = sp->dec_codetab + CODE_FIRST;
++			_TIFFmemset(free_entp, 0, (CSIZE-CODE_FIRST)*sizeof (code_t));
+ 			nbits = BITS_MIN;
+ 			nbitsmask = MAXCODE(BITS_MIN);
+ 			maxcodep = sp->dec_codetab + nbitsmask;
+ 			NextCode(tif, sp, bp, code, GetNextCodeCompat);
+ 			if (code == CODE_EOI)
+ 				break;
++			if (code == CODE_CLEAR) {
++				TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
++				"LZWDecodeCompat: Corrupted LZW table at scanline %d",
++				tif->tif_row);
++				return (0);
++			}
+ 			*op++ = code, occ--;
+ 			oldcodep = sp->dec_codetab + code;
+ 			continue;
================================================================