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Bug 760106 - Heap-buffer overread in iconv from ms-excel-read.c:1028 on a fuzzed xls file
Heap-buffer overread in iconv from ms-excel-read.c:1028 on a fuzzed xls file
Status: RESOLVED FIXED
Product: Gnumeric
Classification: Applications
Component: import/export MS Excel (tm)
git master
Other Linux
: Normal critical
: ---
Assigned To: Jody Goldberg
Jody Goldberg
Depends on:
Blocks:
 
 
Reported: 2016-01-03 21:39 UTC by jutaky
Modified: 2016-01-05 14:52 UTC
See Also:
GNOME target: ---
GNOME version: ---


Description jutaky 2016-01-03 21:39:01 UTC 
Git versions of gtk, glib, goffice, gnumeric, libgsf and libxml2.

Test case: http://jutaky.com/fuzzing/gnumeric_case_010-ms-excel-read.c.1028.xls

$ ssconvert gnumeric_case_010-ms-excel-read.c.1028.xls /tmp/out.gnumeric

==28420==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x606000059e11 at pc 0x000000488176 bp 0x7ffeb70faa70 sp 0x7ffeb70fa220
READ of size 13 at 0x606000059e11 thread T0
    #0 0x488175 in iconv (apps/bin/ssconvert+0x488175)
    #1 0x7fa20a8d01a2 in excel_get_chars gnumeric/gnumeric/plugins/excel/ms-excel-read.c:1028:3
    #2 0x7fa20a8d0777 in excel_get_text gnumeric/gnumeric/plugins/excel/ms-excel-read.c:1083:8
    #3 0x7fa20a94f44e in excel_parse_formula1 gnumeric/gnumeric/plugins/excel/ms-formula-read.c:1315:10
    #4 0x7fa20a94dbc3 in excel_parse_formula gnumeric/gnumeric/plugins/excel/ms-formula-read.c:1910:21
    #5 0x7fa20a8fe2df in excel_formula_shared gnumeric/gnumeric/plugins/excel/ms-excel-read.c:2843:10
    #6 0x7fa20a8fe2df in excel_read_FORMULA gnumeric/gnumeric/plugins/excel/ms-excel-read.c:2970
    #7 0x7fa20a8fe2df in excel_read_sheet gnumeric/gnumeric/plugins/excel/ms-excel-read.c:6687
    #8 0x7fa20a8e180d in excel_read_BOF gnumeric/gnumeric/plugins/excel/ms-excel-read.c:7119:4
    #9 0x7fa20a8d8cb2 in excel_read_workbook gnumeric/gnumeric/plugins/excel/ms-excel-read.c:7228:4
    #10 0x7fa20a8b17a2 in excel_enc_file_open gnumeric/gnumeric/plugins/excel/boot.c:193:2
    #11 0x7fa229884ed2 in go_plugin_loader_module_func_file_open gnumeric/goffice/goffice/app/go-plugin-loader-module.c:282:3
    #12 0x7fa22988db96 in go_plugin_file_opener_open gnumeric/goffice/goffice/app/go-plugin-service.c:685:2
    #13 0x7fa229891cec in go_file_opener_open gnumeric/goffice/goffice/app/file.c:417:2
    #14 0x7fa22a490d00 in workbook_view_new_from_input gnumeric/gnumeric/src/workbook-view.c:1278:3
    #15 0x7fa22a49107f in workbook_view_new_from_uri gnumeric/gnumeric/src/workbook-view.c:1337:9
    #16 0x4dd2b5 in convert gnumeric/gnumeric/src/ssconvert.c:715:9
    #17 0x4dc6f4 in main gnumeric/gnumeric/src/ssconvert.c:918:19
    #18 0x7fa2244f660f in __libc_start_main (/usr/lib/libc.so.6+0x2060f)
    #19 0x41a688 in _start (apps/bin/ssconvert+0x41a688)

--
Juha Kylmänen
Comment 1 Morten Welinder 2016-01-05 14:52:55 UTC 
This problem has been fixed in our software repository. The fix will go into the next software release. Once that release is available, you may want to check for a software upgrade provided by your Linux distribution.