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poppler.31330
poppler-CVE-2022-37052.patch
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File poppler-CVE-2022-37052.patch of Package poppler.31330
Index: poppler-0.62.0/poppler/PDFDoc.cc =================================================================== --- poppler-0.62.0.orig/poppler/PDFDoc.cc +++ poppler-0.62.0/poppler/PDFDoc.cc @@ -813,7 +813,14 @@ int PDFDoc::savePageAs(GooString *name, Object resourcesObj = pagesDict->lookup("Resources"); if (resourcesObj.isDict()) markPageObjects(resourcesObj.getDict(), yRef, countRef, 0, refPage->num, rootNum + 2); - markPageObjects(catDict, yRef, countRef, 0, refPage->num, rootNum + 2); + if (!markPageObjects(catDict, yRef, countRef, 0, refPage->num, rootNum + 2)) { + fclose(f); + delete yRef; + delete countRef; + delete outStr; + error(errSyntaxError, -1, "markPageObjects failed"); + return errDamaged; + } Dict *pageDict = page.getDict(); if (resourcesObj.isNull() && !pageDict->hasKey("Resources")) { @@ -1514,7 +1521,7 @@ void PDFDoc::writeHeader(OutStream *outS outStr->printf("%%\xE2\xE3\xCF\xD3\n"); } -void PDFDoc::markDictionnary (Dict* dict, XRef * xRef, XRef *countRef, Guint numOffset, int oldRefNum, int newRefNum, std::set<Dict*> *alreadyMarkedDicts) +bool PDFDoc::markDictionnary (Dict* dict, XRef * xRef, XRef *countRef, Guint numOffset, int oldRefNum, int newRefNum, std::set<Dict*> *alreadyMarkedDicts) { bool deleteSet = false; if (!alreadyMarkedDicts) { @@ -1525,7 +1532,7 @@ void PDFDoc::markDictionnary (Dict* dict if (alreadyMarkedDicts->find(dict) != alreadyMarkedDicts->end()) { error(errSyntaxWarning, -1, "PDFDoc::markDictionnary: Found recursive dicts"); if (deleteSet) delete alreadyMarkedDicts; - return; + return true; } else { alreadyMarkedDicts->insert(dict); } @@ -1535,7 +1542,10 @@ void PDFDoc::markDictionnary (Dict* dict const char *key = dict->getKey(i); if (strcmp(key, "Annots") != 0) { Object obj1 = dict->getValNF(i); - markObject(&obj1, xRef, countRef, numOffset, oldRefNum, newRefNum, alreadyMarkedDicts); + const bool success = markObject(&obj1, xRef, countRef, numOffset, oldRefNum, newRefNum, alreadyMarkedDicts); + if (unlikely(!success)) { + return false; + } } else { Object annotsObj = dict->getValNF(i); if (!annotsObj.isNull()) { @@ -1547,9 +1557,11 @@ void PDFDoc::markDictionnary (Dict* dict if (deleteSet) { delete alreadyMarkedDicts; } + + return true; } -void PDFDoc::markObject (Object* obj, XRef *xRef, XRef *countRef, Guint numOffset, int oldRefNum, int newRefNum, std::set<Dict*> *alreadyMarkedDicts) +bool PDFDoc::markObject (Object* obj, XRef *xRef, XRef *countRef, Guint numOffset, int oldRefNum, int newRefNum, std::set<Dict*> *alreadyMarkedDicts) { Array *array; @@ -1558,25 +1570,39 @@ void PDFDoc::markObject (Object* obj, XR array = obj->getArray(); for (int i=0; i<array->getLength(); i++) { Object obj1 = array->getNF(i); - markObject(&obj1, xRef, countRef, numOffset, oldRefNum, newRefNum, alreadyMarkedDicts); + const bool success = markObject(&obj1, xRef, countRef, numOffset, oldRefNum, newRefNum, alreadyMarkedDicts); + if (unlikely(!success)) { + return false; + } } break; case objDict: - markDictionnary (obj->getDict(), xRef, countRef, numOffset, oldRefNum, newRefNum, alreadyMarkedDicts); + { + const bool success = markDictionnary (obj->getDict(), xRef, countRef, numOffset, oldRefNum, newRefNum, alreadyMarkedDicts); + if (unlikely(!success)) { + return false; + } + } break; case objStream: { Stream *stream = obj->getStream(); - markDictionnary (stream->getDict(), xRef, countRef, numOffset, oldRefNum, newRefNum, alreadyMarkedDicts); + const bool success = markDictionnary (stream->getDict(), xRef, countRef, numOffset, oldRefNum, newRefNum, alreadyMarkedDicts); + if (unlikely(!success)) { + return false; + } } break; case objRef: { if (obj->getRef().num + (int) numOffset >= xRef->getNumObjects() || xRef->getEntry(obj->getRef().num + numOffset)->type == xrefEntryFree) { if (getXRef()->getEntry(obj->getRef().num)->type == xrefEntryFree) { - return; // already marked as free => should be replaced + return false; // already marked as free => should be replaced + } + const bool success = xRef->add(obj->getRef().num + numOffset, obj->getRef().gen, 0, gTrue); + if (unlikely(!success)) { + return false; } - xRef->add(obj->getRef().num + numOffset, obj->getRef().gen, 0, gTrue); if (getXRef()->getEntry(obj->getRef().num)->type == xrefEntryCompressed) { xRef->getEntry(obj->getRef().num + numOffset)->type = xrefEntryCompressed; } @@ -1592,12 +1618,17 @@ void PDFDoc::markObject (Object* obj, XR break; } Object obj1 = getXRef()->fetch(obj->getRef().num, obj->getRef().gen); - markObject(&obj1, xRef, countRef, numOffset, oldRefNum, newRefNum); + const bool success = markObject(&obj1, xRef, countRef, numOffset, oldRefNum, newRefNum); + if (unlikely(!success)) { + return false; + } } break; default: break; } + + return true; } void PDFDoc::replacePageDict(int pageNo, int rotate, @@ -1640,7 +1671,7 @@ void PDFDoc::replacePageDict(int pageNo, getXRef()->setModifiedObject(&page, *refPage); } -void PDFDoc::markPageObjects(Dict *pageDict, XRef *xRef, XRef *countRef, Guint numOffset, int oldRefNum, int newRefNum, std::set<Dict*> *alreadyMarkedDicts) +bool PDFDoc::markPageObjects(Dict *pageDict, XRef *xRef, XRef *countRef, Guint numOffset, int oldRefNum, int newRefNum, std::set<Dict*> *alreadyMarkedDicts) { pageDict->remove("OpenAction"); pageDict->remove("Outlines"); @@ -1655,9 +1686,13 @@ void PDFDoc::markPageObjects(Dict *pageD strcmp(key, "Annots") != 0 && strcmp(key, "P") != 0 && strcmp(key, "Root") != 0) { - markObject(&value, xRef, countRef, numOffset, oldRefNum, newRefNum, alreadyMarkedDicts); + const bool success = markObject(&value, xRef, countRef, numOffset, oldRefNum, newRefNum, alreadyMarkedDicts); + if (unlikely(!success)) { + return false; + } } } + return true; } GBool PDFDoc::markAnnotations(Object *annotsObj, XRef *xRef, XRef *countRef, Guint numOffset, int oldPageNum, int newPageNum, std::set<Dict*> *alreadyMarkedDicts) { Index: poppler-0.62.0/poppler/PDFDoc.h =================================================================== --- poppler-0.62.0.orig/poppler/PDFDoc.h +++ poppler-0.62.0/poppler/PDFDoc.h @@ -292,7 +292,7 @@ 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, std::set<Dict*> *alreadyMarkedDicts = nullptr); + bool markPageObjects(Dict *pageDict, XRef *xRef, XRef *countRef, Guint numOffset, int oldRefNum, int newRefNum, std::set<Dict*> *alreadyMarkedDicts = nullptr); GBool markAnnotations(Object *annots, XRef *xRef, XRef *countRef, Guint numOffset, int oldPageNum, int newPageNum, std::set<Dict*> *alreadyMarkedDicts = nullptr); void markAcroForm(Object *acrpForm, XRef *xRef, XRef *countRef, Guint numOffset, int oldPageNum, int newPageNum); // write all objects used by pageDict to outStr @@ -310,8 +310,8 @@ public: private: // insert referenced objects in XRef - 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 = nullptr); + bool markDictionnary (Dict* dict, XRef *xRef, XRef *countRef, Guint numOffset, int oldRefNum, int newRefNum, std::set<Dict*> *alreadyMarkedDicts); + bool markObject (Object *obj, XRef *xRef, XRef *countRef, Guint numOffset, int oldRefNum, int newRefNum, std::set<Dict*> *alreadyMarkedDicts = nullptr); static void writeDictionnary (Dict* dict, OutStream* outStr, XRef *xRef, Guint numOffset, Guchar *fileKey, CryptAlgorithm encAlgorithm, int keyLength, int objNum, int objGen, std::set<Dict*> *alreadyWrittenDicts); Index: poppler-0.62.0/poppler/XRef.cc =================================================================== --- poppler-0.62.0.orig/poppler/XRef.cc +++ poppler-0.62.0/poppler/XRef.cc @@ -1324,11 +1324,16 @@ int XRef::getNumEntry(Goffset offset) else return -1; } -void XRef::add(int num, int gen, Goffset offs, GBool used) { +bool XRef::add(int num, int gen, Goffset offs, GBool used) { xrefLocker(); if (num >= size) { if (num >= capacity) { - entries = (XRefEntry *)greallocn(entries, num + 1, sizeof(XRefEntry)); + entries = (XRefEntry *)greallocn_checkoverflow(entries, num + 1, sizeof(XRefEntry)); + if (unlikely(entries == nullptr)) { + size = 0; + capacity = 0; + return false; + } capacity = num + 1; } for (int i = size; i < num + 1; ++i) { @@ -1351,6 +1356,7 @@ void XRef::add(int num, int gen, Goffset e->type = xrefEntryFree; e->offset = 0; } + return true; } void XRef::setModifiedObject (Object* o, Ref r) { Index: poppler-0.62.0/poppler/XRef.h =================================================================== --- poppler-0.62.0.orig/poppler/XRef.h +++ poppler-0.62.0/poppler/XRef.h @@ -193,7 +193,7 @@ public: void setModifiedObject(Object* o, Ref r); Ref addIndirectObject (Object* o); void removeIndirectObject(Ref r); - void add(int num, int gen, Goffset offs, GBool used); + bool add(int num, int gen, Goffset offs, GBool used); // Output XRef table to stream void writeTableToFile(OutStream* outStr, GBool writeAllEntries);
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