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Fix CVE-2017-11114:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-11114
http://seclists.org/fulldisclosure/2017/Jul/76
Patch copied from Debian:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=870299#12
Origin: upstream, commit: fee5dca79a93a37024e494b985386a5fe60bc1b7
Origin: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=870299#12
Author: Mikulas Patocka <mikulas@twibright.com>
Date: Wed Aug 2 20:13:29 2017 +0200
Subject: Fix read out of memory in case of corrupted UTF-8 data
---
charsets.c | 37 +------------------------------------
links.h | 9 ++++-----
2 files changed, 5 insertions(+), 41 deletions(-)
Index: links-2.14/charsets.c
===================================================================
--- links-2.14.orig/charsets.c
+++ links-2.14/charsets.c
@@ -215,41 +215,6 @@ static struct conv_table *get_translatio
return utf_table;
}
-unsigned short int utf8_2_uni_table[0x200] = {
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 0, 0, 0, 192, 0,
- 0, 0, 256, 0, 0, 0, 320, 0, 0, 0, 384, 0, 0, 0, 448, 0,
- 0, 0, 512, 0, 0, 0, 576, 0, 0, 0, 640, 0, 0, 0, 704, 0,
- 0, 0, 768, 0, 0, 0, 832, 0, 0, 0, 896, 0, 0, 0, 960, 0,
- 0, 0, 1024, 0, 0, 0, 1088, 0, 0, 0, 1152, 0, 0, 0, 1216, 0,
- 0, 0, 1280, 0, 0, 0, 1344, 0, 0, 0, 1408, 0, 0, 0, 1472, 0,
- 0, 0, 1536, 0, 0, 0, 1600, 0, 0, 0, 1664, 0, 0, 0, 1728, 0,
- 0, 0, 1792, 0, 0, 0, 1856, 0, 0, 0, 1920, 0, 0, 0, 1984, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-};
-
unsigned char utf_8_1[256] = {
6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
@@ -269,7 +234,7 @@ unsigned char utf_8_1[256] = {
3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 6, 6,
};
-static_const unsigned min_utf_8[9] = {
+static_const unsigned min_utf_8[8] = {
0, 0x4000000, 0x200000, 0x10000, 0x800, 0x80, 0x100, 0x1,
};
Index: links-2.14/links.h
===================================================================
--- links-2.14.orig/links.h
+++ links-2.14/links.h
@@ -3906,15 +3906,14 @@ unsigned char *cp_strchr(int charset, un
void init_charset(void);
unsigned get_utf_8(unsigned char **p);
-extern unsigned short int utf8_2_uni_table[0x200];
#define GET_UTF_8(s, c) \
do { \
if ((unsigned char)(s)[0] < 0x80) \
(c) = (s)++[0]; \
- else if (((c) = utf8_2_uni_table[((unsigned char)(s)[0] << 2) + \
- ((unsigned char)(s)[1] >> 6) - 0x200])) \
- (c) += (unsigned char)(s)[1] & 0x3f, (s) += 2; \
- else \
+ else if ((unsigned char)(s)[0] >= 0xc2 && (unsigned char)(s)[0] < 0xe0 &&\
+ ((unsigned char)(s)[1] & 0xc0) == 0x80) { \
+ (c) = (unsigned char)(s)[0] * 0x40 + (unsigned char)(s)[1], (c) -= 0x3080, (s) += 2;\
+ } else \
(c) = get_utf_8(&(s)); \
} while (0)
#define FWD_UTF_8(s) \
|
