发布 2016-06-13 漏洞条目

Foxit PDF Reader 1.0.1.0925 – CFX_WideString::operator= Invalid Read

Exploit Source

Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=745

We have identified the following crash due to an invalid read in Foxit PDF Reader (version 1.0.1.0925 for Linux 64-bit), when started with a specially crafted PDF file in the following way:

$ DISPLAY=:1 FoxitReader /path/to/poc/file.pdf

The DISPLAY=:1 environment variable is set due to the fact that we are testing the application with a virtual X server (Xvfb), but the issue should be equally reproducible with the program started with standard display settings, too.

An example excerpt from the crash log is as follows:

--- cut ---

Program received signal SIGSEGV, Segmentation fault.

0x0000000000ab467f in CFX_WideString::operator=(CFX_WideString const&) ()

(gdb) where

#0 0x0000000000ab467f in CFX_WideString::operator=(CFX_WideString const&) ()

#1 0x00000000006c53a8 in CRichTextXML::ParseXML2Text(CXML_Element*, CRichTextXML::STYLE*, CRichTextXML::STYLE*) ()

#2 0x00000000006c5357 in CRichTextXML::ParseXML2Text(CXML_Element*, CRichTextXML::STYLE*, CRichTextXML::STYLE*) ()

#3 0x00000000006c5357 in CRichTextXML::ParseXML2Text(CXML_Element*, CRichTextXML::STYLE*, CRichTextXML::STYLE*) ()

#4 0x00000000006c6364 in CRichTextXML::ParseXML2Text() ()

#5 0x00000000006c6a33 in CRichTextXML::SetXML(wchar_t const*, wchar_t const*) ()

#6 0x00000000006c9d49 in CFX_Edit::SetRichTextByXML(wchar_t const*, wchar_t const*, int, int) ()

#7 0x000000000067e995 in CPWL_Note_Contents::SetRichText(CFX_WideString const&) ()

#8 0x000000000067e9e5 in CPWL_NoteItem::SetRichContents(CFX_WideString const&) ()

#9 0x00000000005cbcc7 in CMarkup_Popup::SetNoteContents(CFX_WideString const&, CReader_PageView*) ()

#10 0x00000000005ca0e7 in CMarkup_Popup::InitNote(CReader_PageView*) ()

#11 0x00000000005ca420 in CMarkup_Popup::CreateNote(CReader_PageView*, int) ()

#12 0x00000000005cd578 in CMarkup_Popup::UpdateNote(CReader_PageView*, int) ()

#13 0x00000000005d2475 in CMarkup_AnnotHandler::OnPageVisible(CReader_PageView*, CReader_Annot*) ()

#14 0x00000000006e733e in CTA_AnnotHandler::OnPageVisible(CReader_PageView*, CReader_Annot*) ()

#15 0x0000000000640424 in CBA_PageEventHandler::OnPageVisible(CReader_PageView*) ()

#16 0x0000000000461d1b in CReader_AppEx::OnPageVisible (this=0x14a5120, pDocView=0x19446a0)

at ../../Readerlite/ReaderLite/src/frd_appex.cpp:2901

#17 0x0000000000450bec in CReader_ViewPage::DoPageVisibleAction (this=0x1944670)

at ../../Readerlite/ReaderLite/src/preview.cpp:3204

x#18 0x000000000044b980 in CPDF_TVPreview::Slot_DoPageVisibleEvent (this=0x1943180)

at ../../Readerlite/ReaderLite/src/preview.cpp:1443

#19 0x000000000044e333 in CPDFViewerEventHandler::OnFinishRender (this=0x194c520)

at ../../Readerlite/ReaderLite/src/preview.cpp:2386

#20 0x000000000061db28 in CPDFViewerEx::ContinueRendering() ()

#21 0x000000000061de17 in CPDFViewerEx::GetRenderData(int) ()

#22 0x000000000044b274 in CPDF_TVPreview::paintEvent (this=0x1943180)

at ../../Readerlite/ReaderLite/src/preview.cpp:1305

#23 0x00007ffff74c2302 in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5

#24 0x00007ffff7486c8c in QApplicationPrivate::notify_helper(QObject*, QEvent*) ()