http://bugzilla.opensuse.org/show_bug.cgi?id=1037928 Bug ID: 1037928 Summary: VUL-1: lrzip: use-after-free in read_stream (stream.c) Classification: openSUSE Product: openSUSE Distribution Version: Leap 42.2 Hardware: Other OS: Other Status: NEW Severity: Normal Priority: P5 - None Component: Security Assignee: security-team@suse.de Reporter: mikhail.kasimov@gmail.com QA Contact: qa-bugs@suse.de Found By: --- Blocker: --- Created attachment 724065 --> http://bugzilla.opensuse.org/attachment.cgi?id=724065&action=edit 00233-lrzip-UAF-read_stream_reproducer Ref: https://blogs.gentoo.org/ago/2017/05/07/lrzip-use-after-free-in-read_stream-... ========================================================== Description: lrzip is a compression utility that excels at compressing large files. The complete ASan output of the issue: # lrzip -t $FILE ==4026==ERROR: AddressSanitizer: heap-use-after-free on address 0x62100000dd00 at pc 0x0000004bccc5 bp 0x7ffcf3b4d9f0 sp 0x7ffcf3b4d1a0 READ of size 1 at 0x62100000dd00 thread T0 #0 0x4bccc4 in __asan_memcpy /tmp/portage/sys-devel/llvm-3.9.1-r1/work/llvm-3.9.1.src/projects/compiler-rt/lib/asan/asan_interceptors.cc:413 #1 0x53cff6 in read_stream /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/stream.c:1747:4 #2 0x5307fc in read_vchars /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/runzip.c:79:6 #3 0x5307fc in unzip_match /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/runzip.c:208 #4 0x5307fc in runzip_chunk /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/runzip.c:329 #5 0x5307fc in runzip_fd /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/runzip.c:382 #6 0x519b41 in decompress_file /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/lrzip.c:826:6 #7 0x511074 in main /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/main.c:669:4 #8 0x7f743a5d278f in __libc_start_main /tmp/portage/sys-libs/glibc-2.23-r3/work/glibc-2.23/csu/../csu/libc-start.c:289 #9 0x41abf8 in _init (/usr/bin/lrzip+0x41abf8) 0x62100000dd00 is located 0 bytes inside of 4096-byte region [0x62100000dd00,0x62100000ed00) freed by thread T0 here: #0 0x4d3660 in free /tmp/portage/sys-devel/llvm-3.9.1-r1/work/llvm-3.9.1.src/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:47 #1 0x53d186 in fill_buffer /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/stream.c:1574:3 #2 0x53d186 in read_stream /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/stream.c:1755 #3 0x5307fc in read_vchars /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/runzip.c:79:6 #4 0x5307fc in unzip_match /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/runzip.c:208 #5 0x5307fc in runzip_chunk /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/runzip.c:329 #6 0x5307fc in runzip_fd /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/runzip.c:382 #7 0x519b41 in decompress_file /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/lrzip.c:826:6 #8 0x511074 in main /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/main.c:669:4 #9 0x7f743a5d278f in __libc_start_main /tmp/portage/sys-libs/glibc-2.23-r3/work/glibc-2.23/csu/../csu/libc-start.c:289 previously allocated by thread T1 here: #0 0x4d39b8 in malloc /tmp/portage/sys-devel/llvm-3.9.1-r1/work/llvm-3.9.1.src/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:64 #1 0x54b0d7 in lzma_decompress_buf /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/stream.c:546:20 #2 0x54b0d7 in ucompthread /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/stream.c:1522 #3 0x7f743b36e4a3 in start_thread /tmp/portage/sys-libs/glibc-2.23-r3/work/glibc-2.23/nptl/pthread_create.c:333 Thread T1 created by T0 here: #0 0x42d49d in pthread_create /tmp/portage/sys-devel/llvm-3.9.1-r1/work/llvm-3.9.1.src/projects/compiler-rt/lib/asan/asan_interceptors.cc:245 #1 0x53e70f in create_pthread /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/stream.c:133:6 #2 0x53e70f in fill_buffer /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/stream.c:1673 #3 0x53e70f in read_stream /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/stream.c:1755 #4 0x5303e3 in read_u8 /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/runzip.c:55:6 #5 0x5303e3 in read_header /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/runzip.c:144 #6 0x5303e3 in runzip_chunk /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/runzip.c:314 #7 0x5303e3 in runzip_fd /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/runzip.c:382 #8 0x519b41 in decompress_file /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/lrzip.c:826:6 #9 0x511074 in main /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/main.c:669:4 #10 0x7f743a5d278f in __libc_start_main /tmp/portage/sys-libs/glibc-2.23-r3/work/glibc-2.23/csu/../csu/libc-start.c:289 SUMMARY: AddressSanitizer: heap-use-after-free /tmp/portage/sys-devel/llvm-3.9.1-r1/work/llvm-3.9.1.src/projects/compiler-rt/lib/asan/asan_interceptors.cc:413 in __asan_memcpy Shadow bytes around the buggy address: 0x0c427fff9b50: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c427fff9b60: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c427fff9b70: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c427fff9b80: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c427fff9b90: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa =>0x0c427fff9ba0:[fd]fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c427fff9bb0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c427fff9bc0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c427fff9bd0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c427fff9be0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c427fff9bf0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 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 ==4026==ABORTING Affected version: 0.631 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/00233-lrzip-UAF-read_stream Timeline: 2017-03-24: bug discovered and reported to upstream 2017-05-07: blog post about the issue Note: This bug was found with American Fuzzy Lop. Permalink: ========================================================== (open-)SUSE: https://software.opensuse.org/package/lrzip 0.631 (TW, official repo) 0.621 (42.{1,2}, official repo) ========================================================== k_mikhail@linux-mk500:~> lrzip -t 00233-lrzip-UAF-read_stream Decompressing... pthread_joinNo such file or directory Fatal error - exiting k_mikhail@linux-mk500:~> lrzip --version lrzip version 0.621 ========================================================== -- You are receiving this mail because: You are on the CC list for the bug.