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podofo: NULL pointer dereference in GraphicsStack::TGraphicsStackElement::~TGraphicsStackElement (graphicsstack.h)
From: "Agostino Sarubbo" <ago () gentoo org>
Date: Thu, 2 Mar 2017 16:33:47 +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 ==7677==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x00000054b701 bp 0x7ffe64ec7cb0 sp 0x7ffe64ec7c80 T0) ==7677==The signal is caused by a READ memory access. ==7677==Hint: address points to the zero page. #0 0x54b700 in GraphicsStack::TGraphicsStackElement::~TGraphicsStackElement() /tmp/portage/app-text/podofo-0.9.5/work/podofo-0.9.5/tools/podofocolor/graphicsstack.h:29:11 #1 0x55b772 in std::deque<GraphicsStack::TGraphicsStackElement, std::allocator >::pop_back() /usr/lib/gcc/x86_64-pc-linux-gnu/4.9.4/include/g++-v4/bits/stl_deque.h:1459:4 #2 0x52c84d in ColorChanger::ReplaceColorsInPage(PoDoFo::PdfCanvas*) /tmp/portage/app-text/podofo-0.9.5/work/podofo-0.9.5/tools/podofocolor/colorchanger.cpp:190:35 #3 0x526921 in ColorChanger::start() /tmp/portage/app-text/podofo-0.9.5/work/podofo-0.9.5/tools/podofocolor/colorchanger.cpp:120:15 #4 0x523b8d in main /tmp/portage/app-text/podofo-0.9.5/work/podofo-0.9.5/tools/podofocolor/podofocolor.cpp:116:12 #5 0x7fc9a444f78f in __libc_start_main /tmp/portage/sys-libs/glibc-2.23-r3/work/glibc-2.23/csu/../csu/libc-start.c:289 #6 0x4300e8 in _start (/usr/bin/podofocolor+0x4300e8) AddressSanitizer can not provide additional info. SUMMARY: AddressSanitizer: SEGV /tmp/portage/app-text/podofo-0.9.5/work/podofo-0.9.5/tools/podofocolor/graphicsstack.h:29:11 in GraphicsStack::TGraphicsStackElement::~TGraphicsStackElement() ==7677==ABORTING Affected version: 0.9.5 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/00216-podofo-nullptr-graphicsstack-h Timeline: 2017-03-01: 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-graphicsstacktgraphicsstackelementtgraphicsstackelement-graphicsstack-h -- Agostino Sarubbo Gentoo Linux Developer
Current thread:
- podofo: NULL pointer dereference in GraphicsStack::TGraphicsStackElement::~TGraphicsStackElement (graphicsstack.h) Agostino Sarubbo (Mar 02)