Bugzilla – Bug 1024533
VUL-1: CVE-2017-5978: zziplib: out of bounds read in zzip_mem_entry_new (memdisk.c)
Last modified: 2018-10-04 12:15:24 UTC
Ref: http://seclists.org/oss-sec/2017/q1/358 ============================================= Description: zziplib is an intentionally lightweight library that offers the ability to easily extract data from files archived in a single zip file. A fuzz on it discovered an out of bounds read. The complete ASan output: # unzzipcat-mem $FILE ==7934==ERROR: AddressSanitizer: unknown-crash on address 0x7f439a704000 at pc 0x0000004bb815 bp 0x7fff911ebe30 sp 0x7fff911eb5e0 READ of size 59396 at 0x7f439a704000 thread T0 #0 0x4bb814 in __asan_memcpy /tmp/portage/sys-devel/llvm-3.9.0- r1/work/llvm-3.9.0.src/projects/compiler-rt/lib/asan/asan_interceptors.cc:413 #1 0x7f439a3da299 in zzip_mem_entry_new /tmp/portage/dev- libs/zziplib-0.13.62-r1/work/zziplib-0.13.62/zzip/memdisk.c:210:13 #2 0x7f439a3da299 in zzip_mem_disk_load /tmp/portage/dev- libs/zziplib-0.13.62-r1/work/zziplib-0.13.62/zzip/memdisk.c:137 #3 0x7f439a3d98b7 in zzip_mem_disk_open /tmp/portage/dev- libs/zziplib-0.13.62-r1/work/zziplib-0.13.62/zzip/memdisk.c:89:5 #4 0x50982d in main /tmp/portage/dev-libs/zziplib-0.13.62- r1/work/zziplib-0.13.62/bins/unzzipcat-mem.c:82:12 #5 0x7f439951961f in __libc_start_main /var/tmp/portage/sys- libs/glibc-2.22-r4/work/glibc-2.22/csu/libc-start.c:289 #6 0x419748 in _init (/usr/bin/unzzipcat-mem+0x419748) AddressSanitizer can not describe address in more detail (wild memory access suspected). SUMMARY: AddressSanitizer: unknown-crash /tmp/portage/sys-devel/llvm-3.9.0- r1/work/llvm-3.9.0.src/projects/compiler-rt/lib/asan/asan_interceptors.cc:413 in __asan_memcpy Shadow bytes around the buggy address: 0x0fe8f34d87b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0fe8f34d87c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0fe8f34d87d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0fe8f34d87e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0fe8f34d87f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 =>0x0fe8f34d8800:[fe]fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe 0x0fe8f34d8810: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe 0x0fe8f34d8820: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe 0x0fe8f34d8830: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe 0x0fe8f34d8840: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe 0x0fe8f34d8850: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Heap right redzone: fb Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack partial redzone: f4 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb ==7934==ABORTING Affected version: 0.13.62 Fixed version: N/A Commit fix: N/A Credit: This bug was discovered by Agostino Sarubbo of Gentoo. CVE: N/A Reproducer: https://github.com/asarubbo/poc/blob/master/00156-zziplib-oobread-zzip_mem_entry_new Timeline: 2017-01-17: bug discovered and poked upstream 2017-02-09: blog post about the issue Note: This bug was found with American Fuzzy Lop. Permalink: https://blogs.gentoo.org/ago/2017/02/09/zziplib-out-of-bounds-read-in-zzip_mem_entry_new-memdisk-c -- Agostino Sarubbo Gentoo Linux Developer ============================================= https://software.opensuse.org/package/zziplib TW|42.(1|2): 0.13.62 A note about the multiple crashes in zziplib: http://seclists.org/oss-sec/2017/q1/365
The only codestream SUSE:SLE-12:Update is affected. The library seems to be only used for a texlive component: luatex -> luazip. As the reporter of these issues says in: http://seclists.org/oss-sec/2017/q1/365 the upstream project appears dead and there was no release for five years. QA reproducer: Using the PoC file from https://github.com/asarubbo/poc/blob/master/00156-zziplib-oobread-zzip_mem_entry_new I was able to reproduce the issue on Leap 42.2: - install zziplib-devel - run `unzzipcat 00156-zziplib-oobread-zzip_mem_entry_new` - it will segfault
bugbot adjusting priority
CVE-2017-5978 has been assigned: http://www.openwall.com/lists/oss-security/2017/02/14/3
request id 129777
SUSE-SU-2017:1095-1: An update that solves 8 vulnerabilities and has two fixes is now available. Category: security (moderate) Bug References: 1024517,1024528,1024531,1024532,1024533,1024534,1024535,1024536,1024537,1024539 CVE References: CVE-2017-5974,CVE-2017-5975,CVE-2017-5976,CVE-2017-5977,CVE-2017-5978,CVE-2017-5979,CVE-2017-5980,CVE-2017-5981 Sources used: SUSE Linux Enterprise Workstation Extension 12-SP2 (src): zziplib-0.13.62-9.1 SUSE Linux Enterprise Workstation Extension 12-SP1 (src): zziplib-0.13.62-9.1 SUSE Linux Enterprise Software Development Kit 12-SP2 (src): zziplib-0.13.62-9.1 SUSE Linux Enterprise Software Development Kit 12-SP1 (src): zziplib-0.13.62-9.1 SUSE Linux Enterprise Desktop 12-SP2 (src): zziplib-0.13.62-9.1 SUSE Linux Enterprise Desktop 12-SP1 (src): zziplib-0.13.62-9.1
openSUSE-SU-2017:1210-1: An update that solves 8 vulnerabilities and has two fixes is now available. Category: security (moderate) Bug References: 1024517,1024528,1024531,1024532,1024533,1024534,1024535,1024536,1024537,1024539 CVE References: CVE-2017-5974,CVE-2017-5975,CVE-2017-5976,CVE-2017-5977,CVE-2017-5978,CVE-2017-5979,CVE-2017-5980,CVE-2017-5981 Sources used: openSUSE Leap 42.2 (src): zziplib-0.13.62-10.3.1 openSUSE Leap 42.1 (src): zziplib-0.13.62-10.1
released