ed0e1e4d44
1979 changes to exploits/shellcodes Couchdb 1.5.0 - 'uuids' Denial of Service Apache CouchDB 1.5.0 - 'uuids' Denial of Service Beyond Remote 2.2.5.3 - Denial of Service (PoC) udisks2 2.8.0 - Denial of Service (PoC) Termite 3.4 - Denial of Service (PoC) SoftX FTP Client 3.3 - Denial of Service (PoC) Silverstripe 2.3.5 - Cross-Site Request Forgery / Open redirection SilverStripe CMS 2.3.5 - Cross-Site Request Forgery / Open Redirection Silverstripe CMS 3.0.2 - Multiple Vulnerabilities SilverStripe CMS 3.0.2 - Multiple Vulnerabilities Silverstripe CMS 2.4 - File Renaming Security Bypass SilverStripe CMS 2.4 - File Renaming Security Bypass Silverstripe CMS 2.4.5 - Multiple Cross-Site Scripting Vulnerabilities SilverStripe CMS 2.4.5 - Multiple Cross-Site Scripting Vulnerabilities Silverstripe CMS 2.4.7 - 'install.php' PHP Code Injection SilverStripe CMS 2.4.7 - 'install.php' PHP Code Injection Silverstripe Pixlr Image Editor - 'upload.php' Arbitrary File Upload SilverStripe CMS Pixlr Image Editor - 'upload.php' Arbitrary File Upload Silverstripe CMS 2.4.x - 'BackURL' Open Redirection SilverStripe CMS 2.4.x - 'BackURL' Open Redirection Silverstripe CMS - 'MemberLoginForm.php' Information Disclosure SilverStripe CMS - 'MemberLoginForm.php' Information Disclosure Silverstripe CMS - Multiple HTML Injection Vulnerabilities SilverStripe CMS - Multiple HTML Injection Vulnerabilities Apache CouchDB 1.7.0 and 2.x before 2.1.1 - Remote Privilege Escalation Apache CouchDB 1.7.0 / 2.x < 2.1.1 - Remote Privilege Escalation Monstra CMS before 3.0.4 - Cross-Site Scripting Monstra CMS < 3.0.4 - Cross-Site Scripting (2) Monstra CMS < 3.0.4 - Cross-Site Scripting Monstra CMS < 3.0.4 - Cross-Site Scripting (1) Navigate CMS 2.8 - Cross-Site Scripting Collectric CMU 1.0 - 'lang' SQL injection Joomla! Component CW Article Attachments 1.0.6 - 'id' SQL Injection LG SuperSign EZ CMS 2.5 - Remote Code Execution MyBB Visual Editor 1.8.18 - Cross-Site Scripting Joomla! Component AMGallery 1.2.3 - 'filter_category_id' SQL Injection Joomla! Component Micro Deal Factory 2.4.0 - 'id' SQL Injection RICOH Aficio MP 301 Printer - Cross-Site Scripting Joomla! Component Auction Factory 4.5.5 - 'filter_order' SQL Injection RICOH MP C6003 Printer - Cross-Site Scripting Linux/ARM - Egghunter (PWN!) + execve(_/bin/sh__ NULL_ NULL) Shellcode (28 Bytes) Linux/ARM - sigaction() Based Egghunter (PWN!) + execve(_/bin/sh__ NULL_ NULL) Shellcode (52 Bytes)
77 lines
No EOL
4.7 KiB
Text
77 lines
No EOL
4.7 KiB
Text
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=755
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The following crash due to a heap-based buffer overread can be observed in an ASAN build of the standard Graphite2 gr2FontTest utility (git trunk), triggered with the following command:
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$ ./gr2fonttest /path/to/file -auto
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--- cut ---
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==19167==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60e00000dff1 at pc 0x000000553c7d bp 0x7ffc6c2c7100 sp 0x7ffc6c2c70f8
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READ of size 1 at 0x60e00000dff1 thread T0
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#0 0x553c7c in unsigned long be::_peek<1>(unsigned char const*) graphite/src/./inc/Endian.h:77:73
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#1 0x553be8 in unsigned long be::_peek<2>(unsigned char const*) graphite/src/./inc/Endian.h:50:43
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#2 0x56d7e3 in unsigned short be::peek<unsigned short>(void const*) graphite/src/./inc/Endian.h:55:18
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#3 0x5f2bad in graphite2::TtfUtil::CmapSubtable4NextCodepoint(void const*, unsigned int, int*) graphite/src/TtfUtil.cpp:1042:16
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#4 0x4fce35 in bool cache_subtable<&graphite2::TtfUtil::CmapSubtable4NextCodepoint, &graphite2::TtfUtil::CmapSubtable4Lookup>(unsigned short**, void const*, unsigned int) graphite/src/CmapCache.cpp:65:33
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#5 0x4fb097 in graphite2::CachedCmap::CachedCmap(graphite2::Face const&) graphite/src/CmapCache.cpp:107:14
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#6 0x54b6d2 in graphite2::Face::readGlyphs(unsigned int) graphite/src/Face.cpp:108:22
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#7 0x56f5d4 in (anonymous namespace)::load_face(graphite2::Face&, unsigned int) graphite/src/gr_face.cpp:54:14
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#8 0x56f0e4 in gr_make_face_with_ops graphite/src/gr_face.cpp:89:16
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#9 0x571420 in gr_make_file_face graphite/src/gr_face.cpp:242:23
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#10 0x4ed0b3 in Parameters::testFileFont() const (graphite/gr2fonttest/gr2fonttest+0x4ed0b3)
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#11 0x4f06c9 in main (graphite/gr2fonttest/gr2fonttest+0x4f06c9)
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0x60e00000dff1 is located 0 bytes to the right of 145-byte region [0x60e00000df60,0x60e00000dff1)
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allocated by thread T0 here:
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#0 0x4b85b8 in malloc llvm/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:40
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#1 0x55d42b in graphite2::FileFace::get_table_fn(void const*, unsigned int, unsigned long*) graphite/src/FileFace.cpp:94:11
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#2 0x54f0d1 in graphite2::Face::Table::Table(graphite2::Face const&, graphite2::TtfUtil::Tag, unsigned int) graphite/src/Face.cpp:281:36
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#3 0x4faad3 in graphite2::CachedCmap::CachedCmap(graphite2::Face const&) graphite/src/CmapCache.cpp:91:23
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#4 0x54b6d2 in graphite2::Face::readGlyphs(unsigned int) graphite/src/Face.cpp:108:22
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#5 0x56f5d4 in (anonymous namespace)::load_face(graphite2::Face&, unsigned int) graphite/src/gr_face.cpp:54:14
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#6 0x56f0e4 in gr_make_face_with_ops graphite/src/gr_face.cpp:89:16
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#7 0x571420 in gr_make_file_face graphite/src/gr_face.cpp:242:23
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#8 0x4ed0b3 in Parameters::testFileFont() const (graphite/gr2fonttest/gr2fonttest+0x4ed0b3)
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#9 0x4f06c9 in main (graphite/gr2fonttest/gr2fonttest+0x4f06c9)
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SUMMARY: AddressSanitizer: heap-buffer-overflow graphite/src/./inc/Endian.h:77:73 in unsigned long be::_peek<1>(unsigned char const*)
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Shadow bytes around the buggy address:
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0x0c1c7fff9ba0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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0x0c1c7fff9bb0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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0x0c1c7fff9bc0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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0x0c1c7fff9bd0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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0x0c1c7fff9be0: fa fa fa fa fa fa fa fa fa fa fa fa 00 00 00 00
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=>0x0c1c7fff9bf0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00[01]fa
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0x0c1c7fff9c00: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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0x0c1c7fff9c10: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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0x0c1c7fff9c20: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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0x0c1c7fff9c30: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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0x0c1c7fff9c40: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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Shadow byte legend (one shadow byte represents 8 application bytes):
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Addressable: 00
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Partially addressable: 01 02 03 04 05 06 07
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Heap left redzone: fa
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Heap right redzone: fb
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Freed heap region: fd
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Stack left redzone: f1
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Stack mid redzone: f2
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Stack right redzone: f3
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Stack partial redzone: f4
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Stack after return: f5
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Stack use after scope: f8
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Global redzone: f9
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Global init order: f6
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Poisoned by user: f7
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Container overflow: fc
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Array cookie: ac
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Intra object redzone: bb
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ASan internal: fe
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Left alloca redzone: ca
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Right alloca redzone: cb
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==19167==ABORTING
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--- cut ---
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The bug was reported at https://bugzilla.mozilla.org/show_bug.cgi?id=1254487. Attached are three font files which reproduce the crash.
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Proof of Concept:
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https://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/39862.zip |