File util-linux-colcrt-CVE-2015-5218-overflow.patch of Package python-libmount.4110

Overview Repositories Revisions Requests Users Attributes Meta

File util-linux-colcrt-CVE-2015-5218-overflow.patch of Package python-libmount.4110

From d883d64d96ab9bef510745d064a351145b9babec Mon Sep 17 00:00:00 2001
From: Sami Kerola <kerolasa@iki.fi>
Date: Sun, 9 Aug 2015 18:16:34 +0100
Subject: [PATCH 1/2] colcrt: avoid writing beyond array bound [afl & asan]

text-utils/colcrt.c:205:10: runtime error: index -1 out of bounds for type 'wchar_t [133]'
SUMMARY: AddressSanitizer: undefined-behavior text-utils/colcrt.c:205
=================================================================
==2357==ERROR: AddressSanitizer: global-buffer-overflow on address 0x0000013811b0 at pc 0x0000004e2514 bp 0x7ffdf6ba4450 sp 0x7ffdf6ba4448
READ of size 4 at 0x0000013811b0 thread T0
    #0 0x4e2513 in colcrt /home/src/util-linux/text-utils/colcrt.c:213:8
    #1 0x4e17d4 in main /home/src/util-linux/text-utils/colcrt.c:139:3
    #2 0x7fb77236960f in __libc_start_main (/usr/lib/libc.so.6+0x2060f)
    #3 0x4362c8 in _start (/home/src/util-linux/colcrt+0x4362c8)

Reported-by: Alaa Mubaied <alaamubaied@gmail.com>
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
---
 text-utils/colcrt.c | 2 ++
 1 file changed, 2 insertions(+)

From 70e3fcf293c1827a2655a86584ab13075124a8a8 Mon Sep 17 00:00:00 2001
From: Sami Kerola <kerolasa@iki.fi>
Date: Sun, 9 Aug 2015 18:02:18 +0100
Subject: [PATCH 2/2] colcrt: allocate enough space for data moves [afl & asan]

==2807==ERROR: AddressSanitizer: global-buffer-overflow on address 0x0000013a31f0 at pc 0x0000004e3047 bp 0x7fffcb7df8d0 sp 0x7fffcb7df8c8
READ of size 4 at 0x0000013a31f0 thread T0
    #0 0x4e3046 in move /home/src/util-linux/text-utils/colcrt.c:309:13
    #1 0x4e25b1 in pflush /home/src/util-linux/text-utils/colcrt.c:264:3
    #2 0x4e246d in colcrt /home/src/util-linux/text-utils/colcrt.c:157:4
    #3 0x4e17d4 in main /home/src/util-linux/text-utils/colcrt.c:141:3
    #4 0x7fb0cb2ee60f in __libc_start_main (/usr/lib/libc.so.6+0x2060f)
    #5 0x4362c8 in _start (/home/src/util-linux/colcrt+0x4362c8)

0x0000013a31f0 is located 0 bytes to the right of global variable 'page' defined in 'text-utils/colcrt.c:73:9' (0x1380b40) of size 140976
SUMMARY: AddressSanitizer: global-buffer-overflow /home/src/util-linux/text-utils/colcrt.c:309 move

And another crash:

==4578==ERROR: AddressSanitizer: global-buffer-overflow on address 0x0000013a3d24 at pc 0x0000004e2510 bp 0x7ffc9257b0e0 sp 0x7ffc9257b0d8
READ of size 4 at 0x0000013a3d24 thread T0
    #0 0x4e250f in colcrt /home/src/util-linux/text-utils/colcrt.c:218:8
    #1 0x4e17d4 in main /home/src/util-linux/text-utils/colcrt.c:141:3
    #2 0x7fe0ac94160f in __libc_start_main (/usr/lib/libc.so.6+0x2060f)
    #3 0x4362c8 in _start (/home/src/util-linux/colcrt+0x4362c8)

0x0000013a3d24 is located 8 bytes to the right of global variable 'page' defined in 'text-utils/colcrt.c:73:9' (0x1381240) of size 142044
SUMMARY: AddressSanitizer: global-buffer-overflow /home/src/util-linux/text-utils/colcrt.c:218 colcrt

Reported-by: Alaa Mubaied <alaamubaied@gmail.com>
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
---
 text-utils/colcrt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: util-linux-2.25/text-utils/colcrt.c
===================================================================
--- util-linux-2.25.orig/text-utils/colcrt.c
+++ util-linux-2.25/text-utils/colcrt.c
@@ -68,7 +68,7 @@ static void __attribute__ ((__noreturn__
  * Option -2 forces printing of all half lines.
  */
 
-wchar_t	page[267][132];
+wchar_t	page[268][133];
 
 int	outline = 1;
 int	outcol;
@@ -200,6 +200,8 @@ void colcrt(FILE *f) {
 			/* fallthrough */
 		default:
 			w = wcwidth(c);
+			if (w < 0)
+				continue;
 			if (outcol + w > 132) {
 				outcol++;
 				continue;

Places

File util-linux-colcrt-CVE-2015-5218-overflow.patch of Package python-libmount.4110

Places