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| author | JUN FANG <jun_fang@foxitsoftware.com> | 2015-04-10 13:45:43 -0700 |
|---|---|---|
| committer | JUN FANG <jun_fang@foxitsoftware.com> | 2015-04-10 13:45:43 -0700 |
| commit | 1569728e9f5a60b033e530ee1d4cd99e467649da (patch) | |
| tree | 516d4e5625d98ddd6493fe416810dae54cf1cc1a /core/src | |
| parent | e45a2e4ff91a672d555951963e329cf224d486d6 (diff) | |
| download | pdfium-1569728e9f5a60b033e530ee1d4cd99e467649da.tar.xz | |
Fix a stack overflow in CPDF_Parser::LoadCrossRefV5
A stack overflow was triggered by checked_cast due to
invalid index in pdf files like 'Index[45 -1661]'.
BUG=473400
R=tsepez@chromium.org
Review URL: https://codereview.chromium.org/1054303005
Diffstat (limited to 'core/src')
| -rw-r--r-- | core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp index 592f24f40b..4be403bba6 100644 --- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp +++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp @@ -1039,7 +1039,11 @@ FX_BOOL CPDF_Parser::LoadCrossRefV5(FX_FILESIZE pos, FX_FILESIZE& prev, FX_BOOL CPDF_Object* pCountObj = pArray->GetElement(i * 2 + 1); if (pStartNumObj && pStartNumObj->GetType() == PDFOBJ_NUMBER && pCountObj && pCountObj->GetType() == PDFOBJ_NUMBER) { - arrIndex.push_back(std::make_pair(pStartNumObj->GetInteger(), pCountObj->GetInteger())); + int nStartNum = pStartNumObj->GetInteger(); + int nCount = pCountObj->GetInteger(); + if (nStartNum >= 0 && nCount > 0) { + arrIndex.push_back(std::make_pair(nStartNum, nCount)); + } } } } |