http://bugzilla.opensuse.org/show_bug.cgi?id=1037926 Bug ID: 1037926 Summary: VUL-1: lrzip: heap-based buffer overflow write in read_1g (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: --- Ref: https://blogs.gentoo.org/ago/2017/05/07/lrzip-heap-based-buffer-overflow-wri... ======================================================= Description: lrzip is a compression utility that excels at compressing large files. The complete ASan output of the issue: # lrzip -t $FILE ==25584==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60200000ef33 at pc 0x00000045246e bp 0x7ffd881d4970 sp 0x7ffd881d4120 WRITE of size 8 at 0x60200000ef33 thread T0 #0 0x45246d in read /tmp/portage/sys-devel/llvm-3.9.1-r1/work/llvm-3.9.1.src/projects/compiler-rt/lib/asan/../sanitizer_common/sanitizer_common_interceptors.inc:765 #1 0x537ce1 in read_1g /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/stream.c:731:9 #2 0x53e349 in read_buf /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/stream.c:774:8 #3 0x53e349 in fill_buffer /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/stream.c:1648 #4 0x53e349 in read_stream /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/stream.c:1755 #5 0x5307fc in read_vchars /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/runzip.c:79:6 #6 0x5307fc in unzip_match /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/runzip.c:208 #7 0x5307fc in runzip_chunk /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/runzip.c:329 #8 0x5307fc in runzip_fd /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/runzip.c:382 #9 0x519b41 in decompress_file /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/lrzip.c:826:6 #10 0x511074 in main /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/main.c:669:4 #11 0x7f02ed48f78f in __libc_start_main /tmp/portage/sys-libs/glibc-2.23-r3/work/glibc-2.23/csu/../csu/libc-start.c:289 #12 0x41abf8 in _init (/usr/bin/lrzip+0x41abf8) 0x60200000ef33 is located 0 bytes to the right of 3-byte region [0x60200000ef30,0x60200000ef33) allocated by thread T0 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 0x53e2ab in fill_buffer /tmp/portage/app-arch/lrzip-0.631/work/lrzip-0.631/stream.c:1643:10 #2 0x53e2ab 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 0x7f02ed48f78f 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-buffer-overflow /tmp/portage/sys-devel/llvm-3.9.1-r1/work/llvm-3.9.1.src/projects/compiler-rt/lib/asan/../sanitizer_common/sanitizer_common_interceptors.inc:765 in read Shadow bytes around the buggy address: 0x0c047fff9d90: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c047fff9da0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c047fff9db0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c047fff9dc0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c047fff9dd0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa =>0x0c047fff9de0: fa fa fa fa fa fa[03]fa fa fa fd fd fa fa fd fa 0x0c047fff9df0: fa fa fd fd fa fa 04 fa fa fa 03 fa fa fa 05 fa 0x0c047fff9e00: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c047fff9e10: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c047fff9e20: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c047fff9e30: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 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 ==25584==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/00232-lrzip-heapoverflow-read_1g 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: lrzip: heap-based buffer overflow write in read_1g (stream.c) ======================================================= (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 00232-lrzip-heapoverflow-read_1g Decompressing... 661000% 13220.00 / 2.00 Average DeCompression Speed: 0.000MB/s MD5 CHECK FAILED. Stored:020000ef00f8b3323d0301f100610a60 Output file:88ac0cdf5286a784dc03ddff61bc5c3d 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.