diff -Nru icu-57.1/debian/changelog icu-57.1/debian/changelog --- icu-57.1/debian/changelog 2016-11-26 10:58:31.000000000 +0000 +++ icu-57.1/debian/changelog 2017-04-16 08:50:52.000000000 +0000 @@ -1,3 +1,10 @@ +icu (57.1-6) unstable; urgency=high + + * Backport upstream security fix for CVE-2017-7867 and CVE-2017-7868, + heap-buffer-overflow in utf8TextAccess (closes: #860314). + + -- Laszlo Boszormenyi (GCS) Sun, 16 Apr 2017 08:50:52 +0000 + icu (57.1-5) unstable; urgency=high * Backport upstream fix for CVE-2016-7415: stack-based buffer overflow in diff -Nru icu-57.1/debian/patches/CVE-2017-7867_CVE-2017-7868.patch icu-57.1/debian/patches/CVE-2017-7867_CVE-2017-7868.patch --- icu-57.1/debian/patches/CVE-2017-7867_CVE-2017-7868.patch 1970-01-01 00:00:00.000000000 +0000 +++ icu-57.1/debian/patches/CVE-2017-7867_CVE-2017-7868.patch 2017-04-16 08:50:20.000000000 +0000 @@ -0,0 +1,176 @@ +Index: icu/source/test/intltest/utxttest.h +=================================================================== +--- icu/source/test/intltest/utxttest.h (revision 39670) ++++ icu/source/test/intltest/utxttest.h (revision 39671) +@@ -36,6 +36,7 @@ + void Ticket10562(); + void Ticket10983(); + void Ticket12130(); ++ void Ticket12888(); + + private: + struct m { // Map between native indices & code points. +Index: icu/source/test/intltest/utxttest.cpp +=================================================================== +--- icu/source/test/intltest/utxttest.cpp (revision 39670) ++++ icu/source/test/intltest/utxttest.cpp (revision 39671) +@@ -65,6 +65,8 @@ + if (exec) Ticket10983(); break; + case 7: name = "Ticket12130"; + if (exec) Ticket12130(); break; ++ case 8: name = "Ticket12888"; ++ if (exec) Ticket12888(); break; + default: name = ""; break; + } + } +@@ -1581,3 +1583,63 @@ + } + 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: icu/source/common/utext.cpp +=================================================================== +--- icu/source/common/utext.cpp (revision 39670) ++++ icu/source/common/utext.cpp (revision 39671) +@@ -845,9 +845,15 @@ + //------------------------------------------------------------------------------ + + // 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 }; + +@@ -887,7 +893,7 @@ + // Requires two extra slots, + // 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; + }; +@@ -1030,6 +1036,7 @@ + // Requested index is in this buffer. + 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; + +@@ -1296,6 +1303,10 @@ + // Can only do this if the incoming index is somewhere in the interior of the string. + // 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); + } + +@@ -1309,7 +1320,10 @@ + UChar *buf = u8b->buf; + 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 + // for a surrogate pair at the +@@ -1336,6 +1350,7 @@ + if (c<0x80) { + // 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); + } else { +@@ -1365,6 +1380,7 @@ + do { + mapToUChars[sIx-- - toUCharsMapStart] = (uint8_t)destIx; + } while (sIx >= srcIx); ++ U_ASSERT(toUCharsMapStart <= (srcIx+1)); + + // Set native indexing limit to be the current position. + // We are processing a non-ascii, non-native-indexing char now; +@@ -1539,6 +1555,7 @@ + U_ASSERT(index>=ut->chunkNativeStart+ut->nativeIndexingLimit); + 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); + return offset; diff -Nru icu-57.1/debian/patches/series icu-57.1/debian/patches/series --- icu-57.1/debian/patches/series 2016-11-26 10:58:31.000000000 +0000 +++ icu-57.1/debian/patches/series 2017-04-16 08:50:35.000000000 +0000 @@ -9,3 +9,4 @@ CVE-2016-0494.patch CVE-2016-6293.patch CVE-2016-7415.patch +CVE-2017-7867_CVE-2017-7868.patch