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| author | JUN FANG <jun_fang@foxitsoftware.com> | 2015-04-11 09:33:23 -0700 |
|---|---|---|
| committer | JUN FANG <jun_fang@foxitsoftware.com> | 2015-04-11 09:33:23 -0700 |
| commit | f265ee5a5f0e96d1a91111f4f27eb2f1edd8835a (patch) | |
| tree | 61752f617913671b60e9c0cfb2f6c21fb652fc26 /core/src/fpdfapi/fpdf_font/fpdf_font.cpp | |
| parent | 9c7b0940569ee5eb1794e8db4e47ecaf3a64315d (diff) | |
| download | pdfium-f265ee5a5f0e96d1a91111f4f27eb2f1edd8835a.tar.xz | |
Fix a heap buffer overflow issue in CPDF_CMap::GetNextChar
Add a check to make sure offset is less than the size of string in the function of GetNextChar().
BUG=471651
R=tsepez@chromium.org
Review URL: https://codereview.chromium.org/1067073003
Diffstat (limited to 'core/src/fpdfapi/fpdf_font/fpdf_font.cpp')
| -rw-r--r-- | core/src/fpdfapi/fpdf_font/fpdf_font.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/core/src/fpdfapi/fpdf_font/fpdf_font.cpp b/core/src/fpdfapi/fpdf_font/fpdf_font.cpp index dd646ca113..41bb95a89d 100644 --- a/core/src/fpdfapi/fpdf_font/fpdf_font.cpp +++ b/core/src/fpdfapi/fpdf_font/fpdf_font.cpp @@ -213,7 +213,7 @@ CFX_WideString CPDF_Font::DecodeString(const CFX_ByteString& str) const FX_LPCSTR src_buf = str; int src_pos = 0; while (src_pos < src_len) { - FX_DWORD charcode = GetNextChar(src_buf, src_pos); + FX_DWORD charcode = GetNextChar(src_buf, src_len, src_pos); CFX_WideString unicode = UnicodeFromCharCode(charcode); if (!unicode.IsEmpty()) { result += unicode; @@ -379,7 +379,7 @@ int CPDF_Font::GetStringWidth(FX_LPCSTR pString, int size) int offset = 0; int width = 0; while (offset < size) { - FX_DWORD charcode = GetNextChar(pString, offset); + FX_DWORD charcode = GetNextChar(pString, size, offset); width += GetCharWidthF(charcode); } return width; |