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Bug 752180 - Out-of-bounds read in position.c:260 on a fuzzed xls file
Out-of-bounds read in position.c:260 on a fuzzed xls file
Product: Gnumeric
Classification: Applications
Component: import/export MS Excel (tm)
git master
Other Linux
: Normal critical
: ---
Assigned To: Jody Goldberg
Jody Goldberg
Depends on:
Reported: 2015-07-09 15:06 UTC by jutaky
Modified: 2015-10-17 19:03 UTC
See Also:
GNOME target: ---
GNOME version: ---

Description jutaky 2015-07-09 15:06:39 UTC
Git versions of glib, goffice, gnumeric, libgsf and libxml2.

Test case:

$ ssconvert gnumeric_case_003-position.c.260.xls /tmp/out.gnumeric

==20976==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000021 (pc 0x7f9e73f114dc bp 0x7fff93e25450 sp 0x7fff93e25220 T0)
    #0 0x7f9e73f114db in parse_pos_init gnumeric/gnumeric/src/position.c:260:19
    #1 0x7f9e4bc7b140 in excel_parse_name gnumeric/gnumeric/plugins/excel/ms-excel-read.c:3664:2
    #2 0x7f9e4bc5c941 in excel_read_NAME gnumeric/gnumeric/plugins/excel/ms-excel-read.c:4010:11
    #3 0x7f9e4bc27cf1 in excel_read_workbook gnumeric/gnumeric/plugins/excel/ms-excel-read.c:7285:22
    #4 0x7f9e4bb9bbd7 in excel_enc_file_open gnumeric/gnumeric/plugins/excel/boot.c:170:4
    #5 0x7f9e4bb9d6e4 in excel_file_open gnumeric/gnumeric/plugins/excel/boot.c:273:2
    #6 0x7f9e71d4e333 in go_plugin_loader_module_func_file_open gnumeric/goffice/goffice/app/go-plugin-loader-module.c:282:3
    #7 0x7f9e71d67d3f in go_plugin_file_opener_open gnumeric/goffice/goffice/app/go-plugin-service.c:685:2
    #8 0x7f9e71d78d18 in go_file_opener_open gnumeric/goffice/goffice/app/file.c:417:2
    #9 0x7f9e7456bf15 in workbook_view_new_from_input gnumeric/gnumeric/src/workbook-view.c:1278:3
    #10 0x7f9e7456cb00 in workbook_view_new_from_uri gnumeric/gnumeric/src/workbook-view.c:1337:9
    #11 0x4e6f9f in convert gnumeric/gnumeric/src/ssconvert.c:720:9
    #12 0x4e49bc in main gnumeric/gnumeric/src/ssconvert.c:913:9
    #13 0x7f9e6b04b78f in __libc_start_main (/usr/lib/
    #14 0x438a48 in _start (apps/bin/ssconvert+0x438a48)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV gnumeric/gnumeric/src/position.c:260 parse_pos_init

Juha Kylmänen
Comment 1 Morten Welinder 2015-10-17 19:03:46 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.