Commit aed0c2d1 authored by Leonardo Arena's avatar Leonardo Arena
Browse files

main/icu: security fixes #7191 (CVE-2017-7867, CVE-2017-7868)

parent 19098c30
......@@ -5,7 +5,7 @@ pkgver=57.1
# convert x.y.z to x_y_z
_ver=${pkgver//./_}
pkgrel=2
pkgrel=3
pkgdesc="International Components for Unicode library"
url="http://www.icu-project.org/"
arch="all"
......@@ -17,6 +17,7 @@ source="http://download.icu-project.org/files/icu4c/${pkgver}/${pkgname}4c-$_ver
icu-timezone.patch
CVE-2016-6293.patch
CVE-2016-7415.patch
CVE-2017-7867-7868.patch
"
# secfixes:
......@@ -24,6 +25,9 @@ source="http://download.icu-project.org/files/icu4c/${pkgver}/${pkgname}4c-$_ver
# - CVE-2016-6293
# 57-1-r2:
# - CVE-2016-7415
# 57.1-r3:
# - CVE-2017-7867
# - CVE-2017-7868
_builddir="$srcdir"/icu/source
......@@ -78,12 +82,15 @@ libs() {
md5sums="976734806026a4ef8bdd17937c8898b9 icu4c-57_1-src.tgz
2c81d9c9a6ea0af5b7391e001f37a5e0 icu-timezone.patch
7e65666fd48718440d819748118834ba CVE-2016-6293.patch
12b7d114d596a5daaf632816bbf91edf CVE-2016-7415.patch"
12b7d114d596a5daaf632816bbf91edf CVE-2016-7415.patch
5d1d5d52155eaa36b9e8eb89ee0fd5cc CVE-2017-7867-7868.patch"
sha256sums="ff8c67cb65949b1e7808f2359f2b80f722697048e90e7cfc382ec1fe229e9581 icu4c-57_1-src.tgz
1c3c432228ee254af7adc995d65b65a4c9dac3b868fe1e49fe588a0ffa55a158 icu-timezone.patch
4b7322fa2d222bf20e74f8fb5d31f3ee44f214fc4b17e60dd89cc6252348435e CVE-2016-6293.patch
7392b0685dd46a3f731e6d3a83ff3f42067eb80f99e434ff801afe2aa38da6b8 CVE-2016-7415.patch"
7392b0685dd46a3f731e6d3a83ff3f42067eb80f99e434ff801afe2aa38da6b8 CVE-2016-7415.patch
408f9efdf73d9dc0a700de611d57109a7a85e75895a650b8d459962709939243 CVE-2017-7867-7868.patch"
sha512sums="a3c701e9c81622db545bcf93f315c7b13159750f43f009d0aec59ceae3a8e1ccb751826d4b8a7387aca47f38bff2a85816b1a123b07d2bf731558c7b66e47b8a icu4c-57_1-src.tgz
40489c36e28e160f08e045acab6c19cdb712ad3b7f87f67099deac7d579aaf13d8841cd3278a6bb0e998b5c34a378348a13fcc8bb14c9c4eb4f6adbd10d66825 icu-timezone.patch
8fba91b583896c52c12a0c8327f12fb77826779e453f91752826143bfdd5d2a2abe8db9836cdb6e12bcd31b9c683c00163e7c787807209d2e87ee8558d6293fb CVE-2016-6293.patch
0aef517165b3aea0e081db63ba2e75e57af7b4fc05eb0cdd222606001efd8bbca1457910f5909515a4a2b14c2d2c7dac426d659d16021cd8d05096c8c12fc64d CVE-2016-7415.patch"
0aef517165b3aea0e081db63ba2e75e57af7b4fc05eb0cdd222606001efd8bbca1457910f5909515a4a2b14c2d2c7dac426d659d16021cd8d05096c8c12fc64d CVE-2016-7415.patch
4b6a6d5a2d96ca2beb400170278745871f6903ff6d0b1e83ddaae3e13dfc872e94805e16540f2e2e9f797cdf9b47d06152e728ed76c77a63c36aeeb1ad8870ad CVE-2017-7867-7868.patch"
Index: source/common/utext.cpp
===================================================================
--- source/common/utext.cpp (revision 39670)
+++ source/common/utext.cpp (revision 39671)
@@ -848,7 +848,13 @@
// Chunk size.
-// Must be less than 85, because of byte mapping from UChar indexes to native indexes.
-// Worst case is three native bytes to one UChar. (Supplemenaries are 4 native bytes
-// to two UChars.)
+// Must be less than 42 (256/6), because of byte mapping from UChar indexes to native indexes.
+// Worst case there are six UTF-8 bytes per UChar.
+// obsolete 6 byte form fd + 5 trails maps to fffd
+// obsolete 5 byte form fc + 4 trails maps to fffd
+// non-shortest 4 byte forms maps to fffd
+// normal supplementaries map to a pair of utf-16, two utf8 bytes per utf-16 unit
+// mapToUChars array size must allow for the worst case, 6.
+// This could be brought down to 4, by treating fd and fc as pure illegal,
+// rather than obsolete lead bytes. But that is not compatible with the utf-8 access macros.
//
enum { UTF8_TEXT_CHUNK_SIZE=32 };
@@ -890,5 +896,5 @@
// one for a supplementary starting in the last normal position,
// and one for an entry for the buffer limit position.
- uint8_t mapToUChars[UTF8_TEXT_CHUNK_SIZE*3+6]; // Map native offset from bufNativeStart to
+ uint8_t mapToUChars[UTF8_TEXT_CHUNK_SIZE*6+6]; // Map native offset from bufNativeStart to
// correspoding offset in filled part of buf.
int32_t align;
@@ -1033,4 +1039,5 @@
u8b = (UTF8Buf *)ut->p; // the current buffer
mapIndex = ix - u8b->toUCharsMapStart;
+ U_ASSERT(mapIndex < (int32_t)sizeof(UTF8Buf::mapToUChars));
ut->chunkOffset = u8b->mapToUChars[mapIndex] - u8b->bufStartIdx;
return TRUE;
@@ -1299,4 +1306,8 @@
// If index is at the end, there is no character there to look at.
if (ix != ut->b) {
+ // Note: this function will only move the index back if it is on a trail byte
+ // and there is a preceding lead byte and the sequence from the lead
+ // through this trail could be part of a valid UTF-8 sequence
+ // Otherwise the index remains unchanged.
U8_SET_CP_START(s8, 0, ix);
}
@@ -1312,5 +1323,8 @@
uint8_t *mapToNative = u8b->mapToNative;
uint8_t *mapToUChars = u8b->mapToUChars;
- int32_t toUCharsMapStart = ix - (UTF8_TEXT_CHUNK_SIZE*3 + 1);
+ int32_t toUCharsMapStart = ix - sizeof(UTF8Buf::mapToUChars) + 1;
+ // Note that toUCharsMapStart can be negative. Happens when the remaining
+ // text from current position to the beginning is less than the buffer size.
+ // + 1 because mapToUChars must have a slot at the end for the bufNativeLimit entry.
int32_t destIx = UTF8_TEXT_CHUNK_SIZE+2; // Start in the overflow region
// at end of buffer to leave room
@@ -1339,4 +1353,5 @@
// Special case ASCII range for speed.
buf[destIx] = (UChar)c;
+ U_ASSERT(toUCharsMapStart <= srcIx);
mapToUChars[srcIx - toUCharsMapStart] = (uint8_t)destIx;
mapToNative[destIx] = (uint8_t)(srcIx - toUCharsMapStart);
@@ -1368,4 +1383,5 @@
mapToUChars[sIx-- - toUCharsMapStart] = (uint8_t)destIx;
} while (sIx >= srcIx);
+ U_ASSERT(toUCharsMapStart <= (srcIx+1));
// Set native indexing limit to be the current position.
@@ -1542,4 +1558,5 @@
U_ASSERT(index<=ut->chunkNativeLimit);
int32_t mapIndex = index - u8b->toUCharsMapStart;
+ U_ASSERT(mapIndex < (int32_t)sizeof(UTF8Buf::mapToUChars));
int32_t offset = u8b->mapToUChars[mapIndex] - u8b->bufStartIdx;
U_ASSERT(offset>=0 && offset<=ut->chunkLength);
Index: source/test/intltest/utxttest.cpp
===================================================================
--- source/test/intltest/utxttest.cpp (revision 39670)
+++ source/test/intltest/utxttest.cpp (revision 39671)
@@ -68,4 +68,6 @@
case 7: name = "Ticket12130";
if (exec) Ticket12130(); break;
+ case 8: name = "Ticket12888";
+ if (exec) Ticket12888(); break;
default: name = ""; break;
}
@@ -1584,2 +1586,62 @@
utext_close(&ut);
}
+
+// Ticket 12888: bad handling of illegal utf-8 containing many instances of the archaic, now illegal,
+// six byte utf-8 forms. Original implementation had an assumption that
+// there would be at most three utf-8 bytes per UTF-16 code unit.
+// The five and six byte sequences map to a single replacement character.
+
+void UTextTest::Ticket12888() {
+ const char *badString =
+ "\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80"
+ "\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80"
+ "\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80"
+ "\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80"
+ "\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80"
+ "\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80"
+ "\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80"
+ "\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80"
+ "\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80"
+ "\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80"
+ "\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80"
+ "\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80"
+ "\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80"
+ "\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80"
+ "\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80"
+ "\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80"
+ "\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80"
+ "\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80"
+ "\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80"
+ "\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80\xfd\x80\x80\x80\x80\x80";
+
+ UErrorCode status = U_ZERO_ERROR;
+ LocalUTextPointer ut(utext_openUTF8(NULL, badString, -1, &status));
+ TEST_SUCCESS(status);
+ for (;;) {
+ UChar32 c = utext_next32(ut.getAlias());
+ if (c == U_SENTINEL) {
+ break;
+ }
+ }
+ int32_t endIdx = utext_getNativeIndex(ut.getAlias());
+ if (endIdx != (int32_t)strlen(badString)) {
+ errln("%s:%d expected=%d, actual=%d", __FILE__, __LINE__, strlen(badString), endIdx);
+ return;
+ }
+
+ for (int32_t prevIndex = endIdx; prevIndex>0;) {
+ UChar32 c = utext_previous32(ut.getAlias());
+ int32_t currentIndex = utext_getNativeIndex(ut.getAlias());
+ if (c != 0xfffd) {
+ errln("%s:%d (expected, actual, index) = (%d, %d, %d)\n",
+ __FILE__, __LINE__, 0xfffd, c, currentIndex);
+ break;
+ }
+ if (currentIndex != prevIndex - 6) {
+ errln("%s:%d: wrong index. Expected, actual = %d, %d",
+ __FILE__, __LINE__, prevIndex - 6, currentIndex);
+ break;
+ }
+ prevIndex = currentIndex;
+ }
+}
Index: source/test/intltest/utxttest.h
===================================================================
--- source/test/intltest/utxttest.h (revision 39670)
+++ source/test/intltest/utxttest.h (revision 39671)
@@ -39,4 +39,5 @@
void Ticket10983();
void Ticket12130();
+ void Ticket12888();
private:
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