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podofo: NULL pointer dereference in GraphicsStack::TGraphicsStackElement::SetNonStrokingColorSpace (graphicsstack.h)
From: "Agostino Sarubbo" <ago () gentoo org>
Date: Thu, 2 Mar 2017 16:36:03 +0000
Description: podofo is a C++ library to work with the PDF file format. A fuzz on it discovered a null pointer dereference. The upstream project denies me to open a new ticket. So, I just will forward this on the -users mailing list. The complete ASan output: # podofocolor dummy $FILE foo ==32192==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x000000525f24 bp 0x7ffe0a1fdc90 sp 0x7ffe0a1fdc00 T0) ==32192==The signal is caused by a READ memory access. ==32192==Hint: address points to the zero page. #0 0x525f23 in GraphicsStack::TGraphicsStackElement::SetNonStrokingColorSpace(PoDoFo::EPdfColorSpace) /tmp/portage/app-text/podofo-0.9.4/work/podofo-0.9.4/tools/podofocolor/graphicsstack.h:83:38 #1 0x525f23 in GraphicsStack::SetNonStrokingColorSpace(PoDoFo::EPdfColorSpace) /tmp/portage/app-text/podofo-0.9.4/work/podofo-0.9.4/tools/podofocolor/graphicsstack.h:129 #2 0x525f23 in ColorChanger::ProcessColor(ColorChanger::EKeywordType, int, std::vector<PoDoFo::PdfVariant, std::allocator >&, GraphicsStack&) /tmp/portage/app-text/podofo-0.9.4/work/podofo-0.9.4/tools/podofocolor/colorchanger.cpp:478 #3 0x521b3c in ColorChanger::ReplaceColorsInPage(PoDoFo::PdfCanvas*) /tmp/portage/app-text/podofo-0.9.4/work/podofo-0.9.4/tools/podofocolor/colorchanger.cpp:214:31 #4 0x51ed8e in ColorChanger::start() /tmp/portage/app-text/podofo-0.9.4/work/podofo-0.9.4/tools/podofocolor/colorchanger.cpp:120:15 #5 0x51c06d in main /tmp/portage/app-text/podofo-0.9.4/work/podofo-0.9.4/tools/podofocolor/podofocolor.cpp:116:12 #6 0x7fc21680761f in __libc_start_main /var/tmp/portage/sys-libs/glibc-2.22-r4/work/glibc-2.22/csu/libc-start.c:289 #7 0x428718 in _start (/usr/bin/podofocolor+0x428718) AddressSanitizer can not provide additional info. SUMMARY: AddressSanitizer: SEGV /tmp/portage/app-text/podofo-0.9.4/work/podofo-0.9.4/tools/podofocolor/graphicsstack.h:83:38 in GraphicsStack::TGraphicsStackElement::SetNonStrokingColorSpace(PoDoFo::EPdfColorSpace) ==32192==ABORTING Affected version: 0.9.4 Fixed version: N/A Commit fix: N/A Credit: This bug was discovered by Agostino Sarubbo of Gentoo. CVE: N/A Reproducer: https://github.com/asarubbo/poc/blob/master/00173-podofo-nullptr-GraphicsStack-TGraphicsStackElement-SetNonStrokingColorSpace Timeline: 2017-02-13: bug discovered 2017-03-02: bug reported to upstream 2017-03-02: blog post about the issue Note: This bug was found with American Fuzzy Lop. Permalink: https://blogs.gentoo.org/ago/2017/03/02/podofo-null-pointer-dereference-in-podofopdfcoloroperator-pdfcolor-cpp -- Agostino Sarubbo Gentoo Linux Developer
Current thread:
- podofo: NULL pointer dereference in GraphicsStack::TGraphicsStackElement::SetNonStrokingColorSpace (graphicsstack.h) Agostino Sarubbo (Mar 02)