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[Bug 1037926] New: VUL-1: lrzip: heap-based buffer overflow write in read_1g (stream.c)
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Sun, 07 May 2017 20:47:10 +0000
  • Message-id: <bug-1037926-21960@http.bugzilla.opensuse.org/>
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@xxxxxxx
Reporter: mikhail.kasimov@xxxxxxxxx
QA Contact: qa-bugs@xxxxxxx
Found By: ---
Blocker: ---

Ref:
https://blogs.gentoo.org/ago/2017/05/07/lrzip-heap-based-buffer-overflow-write-in-read_1g-stream-c/
=======================================================
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
=======================================================

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