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poppler-qt.8309
CVE-2017-7515.patch
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File CVE-2017-7515.patch of Package poppler-qt.8309
diff --git a/poppler/PDFDoc.cc b/poppler/PDFDoc.cc index f02f192f..ec5c7002 100644 --- a/poppler/PDFDoc.cc +++ b/poppler/PDFDoc.cc @@ -1127,8 +1127,22 @@ void PDFDoc::saveCompleteRewrite (OutStream* outStr) } void PDFDoc::writeDictionnary (Dict* dict, OutStream* outStr, XRef *xRef, Guint numOffset, Guchar *fileKey, - CryptAlgorithm encAlgorithm, int keyLength, int objNum, int objGen) + CryptAlgorithm encAlgorithm, int keyLength, int objNum, int objGen, std::set<Dict*> *alreadyWrittenDicts) { + bool deleteSet = false; + if (!alreadyWrittenDicts) { + alreadyWrittenDicts = new std::set<Dict*>; + deleteSet = true; + } + + if (alreadyWrittenDicts->find(dict) != alreadyWrittenDicts->end()) { + error(errSyntaxWarning, -1, "PDFDoc::writeDictionnary: Found recursive dicts"); + if (deleteSet) delete alreadyWrittenDicts; + return; + } else { + alreadyWrittenDicts->insert(dict); + } + Object obj1; outStr->printf("<<"); for (int i=0; i<dict->getLength(); i++) { @@ -1136,10 +1150,14 @@ void PDFDoc::writeDictionnary (Dict* dict, OutStream* outStr, XRef *xRef, Guint GooString *keyNameToPrint = keyName.sanitizedName(gFalse /* non ps mode */); outStr->printf("/%s ", keyNameToPrint->getCString()); delete keyNameToPrint; - writeObject(dict->getValNF(i, &obj1), outStr, xRef, numOffset, fileKey, encAlgorithm, keyLength, objNum, objGen); + writeObject(dict->getValNF(i, &obj1), outStr, xRef, numOffset, fileKey, encAlgorithm, keyLength, objNum, objGen, alreadyWrittenDicts); obj1.free(); } outStr->printf(">> "); + + if (deleteSet) { + delete alreadyWrittenDicts; + } } void PDFDoc::writeStream (Stream* str, OutStream* outStr) @@ -1246,7 +1264,7 @@ Goffset PDFDoc::writeObjectHeader (Ref *ref, OutStream* outStr) } void PDFDoc::writeObject (Object* obj, OutStream* outStr, XRef *xRef, Guint numOffset, Guchar *fileKey, - CryptAlgorithm encAlgorithm, int keyLength, int objNum, int objGen) + CryptAlgorithm encAlgorithm, int keyLength, int objNum, int objGen, std::set<Dict*> *alreadyWrittenDicts) { Array *array; Object obj1; @@ -1293,7 +1311,7 @@ void PDFDoc::writeObject (Object* obj, OutStream* outStr, XRef *xRef, Guint numO outStr->printf("] "); break; case objDict: - writeDictionnary (obj->getDict(), outStr, xRef, numOffset, fileKey, encAlgorithm, keyLength, objNum, objGen); + writeDictionnary (obj->getDict(), outStr, xRef, numOffset, fileKey, encAlgorithm, keyLength, objNum, objGen, alreadyWrittenDicts); break; case objStream: { @@ -1356,7 +1374,7 @@ void PDFDoc::writeObject (Object* obj, OutStream* outStr, XRef *xRef, Guint numO } stream->getDict()->remove("DecodeParms"); - writeDictionnary (stream->getDict(),outStr, xRef, numOffset, fileKey, encAlgorithm, keyLength, objNum, objGen); + writeDictionnary (stream->getDict(),outStr, xRef, numOffset, fileKey, encAlgorithm, keyLength, objNum, objGen, alreadyWrittenDicts); writeStream (stream,outStr); delete encStream; obj1.free(); @@ -1374,7 +1392,7 @@ void PDFDoc::writeObject (Object* obj, OutStream* outStr, XRef *xRef, Guint numO } } } - writeDictionnary (stream->getDict(), outStr, xRef, numOffset, fileKey, encAlgorithm, keyLength, objNum, objGen); + writeDictionnary (stream->getDict(), outStr, xRef, numOffset, fileKey, encAlgorithm, keyLength, objNum, objGen, alreadyWrittenDicts); writeRawStream (stream, outStr); } break; @@ -1509,7 +1527,7 @@ void PDFDoc::writeXRefTableTrailer(Dict *trailerDict, XRef *uxref, GBool writeAl { uxref->writeTableToFile( outStr, writeAllEntries ); outStr->printf( "trailer\r\n"); - writeDictionnary(trailerDict, outStr, xRef, 0, NULL, cryptRC4, 0, 0, 0); + writeDictionnary(trailerDict, outStr, xRef, 0, NULL, cryptRC4, 0, 0, 0, 0); outStr->printf( "\r\nstartxref\r\n"); outStr->printf( "%lli\r\n", uxrefOffset); outStr->printf( "%%%%EOF\r\n"); @@ -1563,26 +1581,44 @@ void PDFDoc::writeHeader(OutStream *outStr, int major, int minor) outStr->printf("%%\xE2\xE3\xCF\xD3\n"); } -void PDFDoc::markDictionnary (Dict* dict, XRef * xRef, XRef *countRef, Guint numOffset, int oldRefNum, int newRefNum) +void PDFDoc::markDictionnary (Dict* dict, XRef * xRef, XRef *countRef, Guint numOffset, int oldRefNum, int newRefNum, std::set<Dict*> *alreadyMarkedDicts) { + bool deleteSet = false; + if (!alreadyMarkedDicts) { + alreadyMarkedDicts = new std::set<Dict*>; + deleteSet = true; + } + + if (alreadyMarkedDicts->find(dict) != alreadyMarkedDicts->end()) { + error(errSyntaxWarning, -1, "PDFDoc::markDictionnary: Found recursive dicts"); + if (deleteSet) delete alreadyMarkedDicts; + return; + } else { + alreadyMarkedDicts->insert(dict); + } + Object obj1; for (int i=0; i<dict->getLength(); i++) { const char *key = dict->getKey(i); if (strcmp(key, "Annots") != 0) { - markObject(dict->getValNF(i, &obj1), xRef, countRef, numOffset, oldRefNum, newRefNum); + markObject(dict->getValNF(i, &obj1), xRef, countRef, numOffset, oldRefNum, newRefNum, alreadyMarkedDicts); } else { Object annotsObj; dict->getValNF(i, &annotsObj); if (!annotsObj.isNull()) { - markAnnotations(&annotsObj, xRef, countRef, 0, oldRefNum, newRefNum); + markAnnotations(&annotsObj, xRef, countRef, 0, oldRefNum, newRefNum, alreadyMarkedDicts); annotsObj.free(); } } obj1.free(); } + + if (deleteSet) { + delete alreadyMarkedDicts; + } } -void PDFDoc::markObject (Object* obj, XRef *xRef, XRef *countRef, Guint numOffset, int oldRefNum, int newRefNum) +void PDFDoc::markObject (Object* obj, XRef *xRef, XRef *countRef, Guint numOffset, int oldRefNum, int newRefNum, std::set<Dict*> *alreadyMarkedDicts) { Array *array; Object obj1; @@ -1596,12 +1632,12 @@ void PDFDoc::markObject (Object* obj, XRef *xRef, XRef *countRef, Guint numOffse } break; case objDict: - markDictionnary (obj->getDict(), xRef, countRef, numOffset, oldRefNum, newRefNum); + markDictionnary (obj->getDict(), xRef, countRef, numOffset, oldRefNum, newRefNum, alreadyMarkedDicts); break; case objStream: { Stream *stream = obj->getStream(); - markDictionnary (stream->getDict(), xRef, countRef, numOffset, oldRefNum, newRefNum); + markDictionnary (stream->getDict(), xRef, countRef, numOffset, oldRefNum, newRefNum, alreadyMarkedDicts); } break; case objRef: @@ -1695,7 +1731,7 @@ void PDFDoc::replacePageDict(int pageNo, int rotate, page.free(); } -void PDFDoc::markPageObjects(Dict *pageDict, XRef *xRef, XRef *countRef, Guint numOffset, int oldRefNum, int newRefNum) +void PDFDoc::markPageObjects(Dict *pageDict, XRef *xRef, XRef *countRef, Guint numOffset, int oldRefNum, int newRefNum, std::set<Dict*> *alreadyMarkedDicts) { pageDict->remove("OpenAction"); pageDict->remove("Outlines"); @@ -1710,13 +1746,13 @@ void PDFDoc::markPageObjects(Dict *pageDict, XRef *xRef, XRef *countRef, Guint n strcmp(key, "Annots") != 0 && strcmp(key, "P") != 0 && strcmp(key, "Root") != 0) { - markObject(&value, xRef, countRef, numOffset, oldRefNum, newRefNum); + markObject(&value, xRef, countRef, numOffset, oldRefNum, newRefNum, alreadyMarkedDicts); } value.free(); } } -GBool PDFDoc::markAnnotations(Object *annotsObj, XRef *xRef, XRef *countRef, Guint numOffset, int oldPageNum, int newPageNum) { +GBool PDFDoc::markAnnotations(Object *annotsObj, XRef *xRef, XRef *countRef, Guint numOffset, int oldPageNum, int newPageNum, std::set<Dict*> *alreadyMarkedDicts) { Object annots; GBool modified = gFalse; annotsObj->fetch(getXRef(), &annots); @@ -1775,7 +1811,7 @@ GBool PDFDoc::markAnnotations(Object *annotsObj, XRef *xRef, XRef *countRef, Gui obj2.free(); } type.free(); - markPageObjects(dict, xRef, countRef, numOffset, oldPageNum, newPageNum); + markPageObjects(dict, xRef, countRef, numOffset, oldPageNum, newPageNum, alreadyMarkedDicts); } obj1.free(); array->getNF(i, &obj1); diff --git a/poppler/PDFDoc.h b/poppler/PDFDoc.h index 99de8a21..b97c02b1 100644 --- a/poppler/PDFDoc.h +++ b/poppler/PDFDoc.h @@ -292,13 +292,13 @@ public: // rewrite pageDict with MediaBox, CropBox and new page CTM void replacePageDict(int pageNo, int rotate, PDFRectangle *mediaBox, PDFRectangle *cropBox); - void markPageObjects(Dict *pageDict, XRef *xRef, XRef *countRef, Guint numOffset, int oldRefNum, int newRefNum); - GBool markAnnotations(Object *annots, XRef *xRef, XRef *countRef, Guint numOffset, int oldPageNum, int newPageNum); + void markPageObjects(Dict *pageDict, XRef *xRef, XRef *countRef, Guint numOffset, int oldRefNum, int newRefNum, std::set<Dict*> *alreadyMarkedDicts = 0); + GBool markAnnotations(Object *annots, XRef *xRef, XRef *countRef, Guint numOffset, int oldPageNum, int newPageNum, std::set<Dict*> *alreadyMarkedDicts = 0); void markAcroForm(Object *acrpForm, XRef *xRef, XRef *countRef, Guint numOffset, int oldPageNum, int newPageNum); // write all objects used by pageDict to outStr Guint writePageObjects(OutStream *outStr, XRef *xRef, Guint numOffset, GBool combine = gFalse); static void writeObject (Object *obj, OutStream* outStr, XRef *xref, Guint numOffset, Guchar *fileKey, - CryptAlgorithm encAlgorithm, int keyLength, int objNum, int objGen); + CryptAlgorithm encAlgorithm, int keyLength, int objNum, int objGen, std::set<Dict*> *alreadyWrittenDicts = 0); static void writeHeader(OutStream *outStr, int major, int minor); // Ownership goes to the caller @@ -311,21 +311,18 @@ public: private: // insert referenced objects in XRef - void markDictionnary (Dict* dict, XRef *xRef, XRef *countRef, Guint numOffset, int oldRefNum, int newRefNum); - void markObject (Object *obj, XRef *xRef, XRef *countRef, Guint numOffset, int oldRefNum, int newRefNum); + void markDictionnary (Dict* dict, XRef *xRef, XRef *countRef, Guint numOffset, int oldRefNum, int newRefNum, std::set<Dict*> *alreadyMarkedDicts); + void markObject (Object *obj, XRef *xRef, XRef *countRef, Guint numOffset, int oldRefNum, int newRefNum, std::set<Dict*> *alreadyMarkedDicts = 0); static void writeDictionnary (Dict* dict, OutStream* outStr, XRef *xRef, Guint numOffset, Guchar *fileKey, - CryptAlgorithm encAlgorithm, int keyLength, int objNum, int objGen); + CryptAlgorithm encAlgorithm, int keyLength, int objNum, int objGen, std::set<Dict*> *alreadyWrittenDicts); // Write object header to current file stream and return its offset static Goffset writeObjectHeader (Ref *ref, OutStream* outStr); static void writeObjectFooter (OutStream* outStr); void writeObject (Object *obj, OutStream* outStr, Guchar *fileKey, CryptAlgorithm encAlgorithm, - int keyLength, int objNum, int objGen) - { writeObject(obj, outStr, getXRef(), 0, fileKey, encAlgorithm, keyLength, objNum, objGen); } - void writeDictionnary (Dict* dict, OutStream* outStr, Guchar *fileKey, CryptAlgorithm encAlgorithm, - int keyLength, int objNum, int objGen) - { writeDictionnary(dict, outStr, getXRef(), 0, fileKey, encAlgorithm, keyLength, objNum, objGen); } + int keyLength, int objNum, int objGen, std::set<Dict*> *alreadyWrittenDicts = 0) + { writeObject(obj, outStr, getXRef(), 0, fileKey, encAlgorithm, keyLength, objNum, objGen, alreadyWrittenDicts); } static void writeStream (Stream* str, OutStream* outStr); static void writeRawStream (Stream* str, OutStream* outStr); void writeXRefTableTrailer (Goffset uxrefOffset, XRef *uxref, GBool writeAllEntries,
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