Date: Fri, 23 Jan 2015 04:07:21 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 197017] segfault in unzip (libarchive) with malformed zip Message-ID: <bug-197017-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=197017 Bug ID: 197017 Summary: segfault in unzip (libarchive) with malformed zip Product: Base System Version: 10.1-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: bin Assignee: freebsd-bugs@FreeBSD.org Reporter: freebsd@delnoch.net Created attachment 152045 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=152045&action=edit zip that causes unzip to segfault Running afl-fuzz on unzip I've run into the following - 0x00000008008877e8 in process_extra (p=0x802041022 "UT\t", extra_length=28, zip_entry=0x802055020) at /usr/src/lib/libarchive/../../contrib/libarchive/libarchive/archive_read_support_format_zip.c:1716 1716 gidsize = p[offset+2+uidsize]; Current language: auto; currently minimal (gdb) p offset $1 = 17 (gdb) p uidsize $2 = -124 % zipdetails out/crashes/id:000000,sig:11,src:000000,op:flip1,pos:52 0000 LOCAL HEADER #1 04034B50 0004 Extract Zip Spec 0A '1.0' 0005 Extract OS 00 'MS-DOS' 0006 General Purpose Flag 0000 0008 Compression Method 0000 'Stored' 000A Last Mod Time 463718E0 'Fri Jan 23 03:07:00 2015' 000E CRC 72051312 0012 Compressed Length 0000000F 0016 Uncompressed Length 0000000F 001A Filename Length 0004 001C Extra Length 001C 001E Filename 'test' 0022 Extra ID #0001 5455 'UT: Extended Timestamp' 0024 Length 0009 0026 Flags '03 mod access' 0027 Mod Time 54C1BAD4 'Fri Jan 23 03:07:00 2015' 002B Access Time 54C1BAD4 'Fri Jan 23 03:07:00 2015' 002F Extra ID #0002 7875 'ux: Unix Extra Type 3' 0031 Length 000B 0033 Version 01 0034 UID Size 84 Truncated file (got 120, wanted 132): -- You are receiving this mail because: You are the assignee for the bug.
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