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d2892f3a2d
* gnu/packages/patches/icu4c-CVE-2015-4760.patch: New file. * gnu-system.am (dist_patch_DATA): Add it. * gnu/packages/icu4c.scm (icu4c)[source]: Add patch.
189 lines
8.1 KiB
Diff
189 lines
8.1 KiB
Diff
Copied from Debian.
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Description: missing boundary checks in layout engine
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It was discovered that ICU Layout Engine was missing multiple boundary checks.
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These could lead to buffer overflows and memory corruption. A specially
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crafted file could cause an application using ICU to parse untrusted font
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files to crash and, possibly, execute arbitrary code.
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Author: Laszlo Boszormenyi (GCS) <gcs@debian.org>
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Origin: upstream, http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/rev/3f9845510b47
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Reviewed-By: srl, bae, mschoene
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Forwarded: not-needed
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Last-Update: 2015-07-30
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---
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--- icu-52.1.orig/source/layout/ContextualGlyphInsertionProc2.cpp
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+++ icu-52.1/source/layout/ContextualGlyphInsertionProc2.cpp
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@@ -82,6 +82,10 @@ le_uint16 ContextualGlyphInsertionProces
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le_int16 markIndex = SWAPW(entry->markedInsertionListIndex);
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if (markIndex > 0) {
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+ if (markGlyph < 0 || markGlyph >= glyphStorage.getGlyphCount()) {
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+ success = LE_INDEX_OUT_OF_BOUNDS_ERROR;
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+ return 0;
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+ }
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le_int16 count = (flags & cgiMarkedInsertCountMask) >> 5;
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le_bool isKashidaLike = (flags & cgiMarkedIsKashidaLike);
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le_bool isBefore = (flags & cgiMarkInsertBefore);
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@@ -90,6 +94,10 @@ le_uint16 ContextualGlyphInsertionProces
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le_int16 currIndex = SWAPW(entry->currentInsertionListIndex);
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if (currIndex > 0) {
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+ if (currGlyph < 0 || currGlyph >= glyphStorage.getGlyphCount()) {
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+ success = LE_INDEX_OUT_OF_BOUNDS_ERROR;
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+ return 0;
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+ }
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le_int16 count = flags & cgiCurrentInsertCountMask;
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le_bool isKashidaLike = (flags & cgiCurrentIsKashidaLike);
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le_bool isBefore = (flags & cgiCurrentInsertBefore);
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--- icu-52.1.orig/source/layout/ContextualGlyphSubstProc.cpp
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+++ icu-52.1/source/layout/ContextualGlyphSubstProc.cpp
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@@ -51,6 +51,10 @@ ByteOffset ContextualGlyphSubstitutionPr
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WordOffset currOffset = SWAPW(entry->currOffset);
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if (markOffset != 0 && LE_SUCCESS(success)) {
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+ if (markGlyph < 0 || markGlyph >= glyphStorage.getGlyphCount()) {
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+ success = LE_INDEX_OUT_OF_BOUNDS_ERROR;
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+ return 0;
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+ }
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LEGlyphID mGlyph = glyphStorage[markGlyph];
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TTGlyphID newGlyph = SWAPW(int16Table.getObject(markOffset + LE_GET_GLYPH(mGlyph), success)); // whew.
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@@ -58,6 +62,10 @@ ByteOffset ContextualGlyphSubstitutionPr
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}
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if (currOffset != 0) {
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+ if (currGlyph < 0 || currGlyph >= glyphStorage.getGlyphCount()) {
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+ success = LE_INDEX_OUT_OF_BOUNDS_ERROR;
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+ return 0;
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+ }
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LEGlyphID thisGlyph = glyphStorage[currGlyph];
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TTGlyphID newGlyph = SWAPW(int16Table.getObject(currOffset + LE_GET_GLYPH(thisGlyph), success)); // whew.
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--- icu-52.1.orig/source/layout/ContextualGlyphSubstProc2.cpp
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+++ icu-52.1/source/layout/ContextualGlyphSubstProc2.cpp
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@@ -45,17 +45,25 @@ le_uint16 ContextualGlyphSubstitutionPro
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if(LE_FAILURE(success)) return 0;
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le_uint16 newState = SWAPW(entry->newStateIndex);
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le_uint16 flags = SWAPW(entry->flags);
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- le_int16 markIndex = SWAPW(entry->markIndex);
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- le_int16 currIndex = SWAPW(entry->currIndex);
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+ le_uint16 markIndex = SWAPW(entry->markIndex);
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+ le_uint16 currIndex = SWAPW(entry->currIndex);
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- if (markIndex != -1) {
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+ if (markIndex != 0x0FFFF) {
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+ if (markGlyph < 0 || markGlyph >= glyphStorage.getGlyphCount()) {
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+ success = LE_INDEX_OUT_OF_BOUNDS_ERROR;
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+ return 0;
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+ }
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le_uint32 offset = SWAPL(perGlyphTable(markIndex, success));
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LEGlyphID mGlyph = glyphStorage[markGlyph];
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TTGlyphID newGlyph = lookup(offset, mGlyph, success);
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glyphStorage[markGlyph] = LE_SET_GLYPH(mGlyph, newGlyph);
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}
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- if (currIndex != -1) {
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+ if (currIndex != 0x0FFFF) {
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+ if (currGlyph < 0 || currGlyph >= glyphStorage.getGlyphCount()) {
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+ success = LE_INDEX_OUT_OF_BOUNDS_ERROR;
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+ return 0;
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+ }
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le_uint32 offset = SWAPL(perGlyphTable(currIndex, success));
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LEGlyphID thisGlyph = glyphStorage[currGlyph];
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TTGlyphID newGlyph = lookup(offset, thisGlyph, success);
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--- icu-52.1.orig/source/layout/IndicRearrangementProcessor.cpp
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+++ icu-52.1/source/layout/IndicRearrangementProcessor.cpp
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@@ -45,6 +45,11 @@ ByteOffset IndicRearrangementProcessor::
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ByteOffset newState = SWAPW(entry->newStateOffset);
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IndicRearrangementFlags flags = (IndicRearrangementFlags) SWAPW(entry->flags);
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+ if (currGlyph < 0 || currGlyph >= glyphStorage.getGlyphCount()) {
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+ success = LE_INDEX_OUT_OF_BOUNDS_ERROR;
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+ return 0;
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+ }
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+
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if (flags & irfMarkFirst) {
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firstGlyph = currGlyph;
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}
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--- icu-52.1.orig/source/layout/IndicRearrangementProcessor2.cpp
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+++ icu-52.1/source/layout/IndicRearrangementProcessor2.cpp
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@@ -43,6 +43,11 @@ le_uint16 IndicRearrangementProcessor2::
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le_uint16 newState = SWAPW(entry->newStateIndex); // index to the new state
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IndicRearrangementFlags flags = (IndicRearrangementFlags) SWAPW(entry->flags);
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+ if (currGlyph < 0 || currGlyph >= glyphStorage.getGlyphCount()) {
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+ success = LE_INDEX_OUT_OF_BOUNDS_ERROR;
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+ return 0;
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+ }
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+
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if (flags & irfMarkFirst) {
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firstGlyph = currGlyph;
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}
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--- icu-52.1.orig/source/layout/LigatureSubstProc.cpp
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+++ icu-52.1/source/layout/LigatureSubstProc.cpp
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@@ -48,7 +48,7 @@ ByteOffset LigatureSubstitutionProcessor
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const LigatureSubstitutionStateEntry *entry = entryTable.getAlias(index, success);
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ByteOffset newState = SWAPW(entry->newStateOffset);
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- le_int16 flags = SWAPW(entry->flags);
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+ le_uint16 flags = SWAPW(entry->flags);
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if (flags & lsfSetComponent) {
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if (++m >= nComponents) {
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--- icu-52.1.orig/source/layout/StateTableProcessor.cpp
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+++ icu-52.1/source/layout/StateTableProcessor.cpp
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@@ -60,6 +60,7 @@ void StateTableProcessor::process(LEGlyp
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if (currGlyph == glyphCount) {
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// XXX: How do we handle EOT vs. EOL?
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classCode = classCodeEOT;
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+ break;
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} else {
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TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(glyphStorage[currGlyph]);
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--- icu-52.1.orig/source/layout/StateTableProcessor2.cpp
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+++ icu-52.1/source/layout/StateTableProcessor2.cpp
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@@ -78,6 +78,7 @@ void StateTableProcessor2::process(LEGly
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if (currGlyph == glyphCount || currGlyph == -1) {
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// XXX: How do we handle EOT vs. EOL?
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classCode = classCodeEOT;
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+ break;
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} else {
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LEGlyphID gid = glyphStorage[currGlyph];
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TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(gid);
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@@ -109,6 +110,7 @@ void StateTableProcessor2::process(LEGly
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if (currGlyph == glyphCount || currGlyph == -1) {
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// XXX: How do we handle EOT vs. EOL?
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classCode = classCodeEOT;
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+ break;
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} else {
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LEGlyphID gid = glyphStorage[currGlyph];
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TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(gid);
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@@ -146,6 +148,7 @@ void StateTableProcessor2::process(LEGly
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if (currGlyph == glyphCount || currGlyph == -1) {
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// XXX: How do we handle EOT vs. EOL?
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classCode = classCodeEOT;
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+ break;
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} else if(currGlyph > glyphCount) {
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// note if > glyphCount, we've run off the end (bad font)
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currGlyph = glyphCount;
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@@ -186,6 +189,7 @@ void StateTableProcessor2::process(LEGly
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if (currGlyph == glyphCount || currGlyph == -1) {
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// XXX: How do we handle EOT vs. EOL?
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classCode = classCodeEOT;
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+ break;
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} else {
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TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(glyphStorage[currGlyph]);
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if (glyphCode == 0xFFFF) {
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--- icu-52.1.orig/source/layout/StateTables.h
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+++ icu-52.1/source/layout/StateTables.h
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@@ -101,7 +101,7 @@ typedef le_uint8 EntryTableIndex;
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struct StateEntry
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{
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ByteOffset newStateOffset;
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- le_int16 flags;
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+ le_uint16 flags;
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};
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typedef le_uint16 EntryTableIndex2;
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