Description: CVE-2017-11110: Heap buffer overflow in ole_init Origin: vendor, https://build.opensuse.org/package/view_file/openSUSE:Maintenance:6985/catdoc.openSUSE_Leap_42.2_Update/CVE-2017-11110.patch?rev=d437c3be72c2e5a3516b75f4e9de6b35 Bug-Debian: https://bugs.debian.org/867717 Bug-SuSE: https://bugzilla.novell.com/show_bug.cgi?id=1047877 Forwarded: no Author: Andreas Stieger <astieger@suse.com> Reviewed-by: Salvatore Bonaccorso <carnil@debian.org> Last-Update: 2017-07-20 --- a/src/ole.c +++ b/src/ole.c @@ -106,6 +106,11 @@ FILE* ole_init(FILE *f, void *buffer, si return NULL; } sectorSize = 1<<getshort(oleBuf,0x1e); + /* CVE-2017-11110 */ + if (sectorSize < 4) { + fprintf(stderr, "sectorSize < 4 not supported\n"); + return NULL; + } shortSectorSize=1<<getshort(oleBuf,0x20); /* Read BBD into memory */ @@ -147,7 +152,7 @@ FILE* ole_init(FILE *f, void *buffer, si } fseek(newfile, 512+mblock*sectorSize, SEEK_SET); - if(fread(tmpBuf+MSAT_ORIG_SIZE+(sectorSize-4)*i, + if(fread(tmpBuf+MSAT_ORIG_SIZE+(sectorSize-4)*i, /* >=4 for CVE-2017-11110 */ 1, sectorSize, newfile) != sectorSize) { fprintf(stderr, "Error read MSAT!\n"); ole_finish();