oss-sec mailing list archives
podofo: invalid memory read in ColorChanger::GetColorFromStack (colorchanger.cpp)
From: "Agostino Sarubbo" <ago () gentoo org>
Date: Thu, 2 Mar 2017 16:33:13 +0000
Description: podofo is a C++ library to work with the PDF file format. A fuzz on it discovered an invalid memory read. 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 ==9073==ERROR: AddressSanitizer: SEGV on unknown address 0xffffffffffffffe0 (pc 0x000000537d67 bp 0x7ffc54cb3c50 sp 0x7ffc54cb3ba0 T0) ==9073==The signal is caused by a READ memory access. #0 0x537d66 in ColorChanger::GetColorFromStack(int, std::vector<PoDoFo::PdfVariant, std::allocator >&) /tmp/portage/app-text/podofo-0.9.5/work/podofo-0.9.5/tools/podofocolor/colorchanger.cpp:416:32 #1 0x530d50 in ColorChanger::ProcessColor(ColorChanger::EKeywordType, int, std::vector<PoDoFo::PdfVariant, std::allocator >&, GraphicsStack&) /tmp/portage/app-text/podofo-0.9.5/work/podofo-0.9.5/tools/podofocolor/colorchanger.cpp:449:28 #2 0x52c2a9 in ColorChanger::ReplaceColorsInPage(PoDoFo::PdfCanvas*) /tmp/portage/app-text/podofo-0.9.5/work/podofo-0.9.5/tools/podofocolor/colorchanger.cpp:214:31 #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 0x7f36fe7fe78f 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/colorchanger.cpp:416:32 in ColorChanger::GetColorFromStack(int, std::vector<PoDoFo::PdfVariant, std::allocator >&) ==9073==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/00215-podofo-invalidread-colorchanger-cpp Timeline: 2017-03-01: bug discovered 2017-03-02: bug reported 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-invalid-memory-read-in-colorchangergetcolorfromstack-colorchanger-cpp -- Agostino Sarubbo Gentoo Linux Developer
Current thread:
- podofo: invalid memory read in ColorChanger::GetColorFromStack (colorchanger.cpp) Agostino Sarubbo (Mar 02)
- Re: podofo: invalid memory read in ColorChanger::GetColorFromStack (colorchanger.cpp) Agostino Sarubbo (Mar 13)