To whom it may concern,
I really appreciate your cooperation for your dedicated time to my report.
The PoC is attached to this email.
# ./memcached --auth-file=input/a.txt -u root -m 1024 -p 11211
=================================================================
==1061115==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x60200000009e at pc 0x7fae5a305f9d bp 0x7ffee16f4fd0 sp 0x7ffee16f4778
WRITE of size 15 at 0x60200000009e thread T0
#0 0x7fae5a305f9c (/lib/x86_64-linux-gnu/libasan.so.5+0x53f9c)
#1 0x55bca5ccaf23 in fgets
/usr/include/x86_64-linux-gnu/bits/stdio2.h:265
#2 0x55bca5ccaf23 in authfile_load
/home/constantine/test/memcached/authfile.c:50
#3 0x55bca5c3ffb5 in main
/home/constantine/test/memcached/memcached.c:5639
#4 0x7fae597010b2 in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x270b2)
#5 0x55bca5c45d9d in _start
(/home/constantine/test/memcached/memcached+0x26d9d)
0x60200000009e is located 0 bytes to the right of 14-byte region
[0x602000000090,0x60200000009e)
allocated by thread T0 here:
#0 0x7fae5a3bfdc6 in calloc
(/lib/x86_64-linux-gnu/libasan.so.5+0x10ddc6)
#1 0x55bca5ccaedd in authfile_load
/home/constantine/test/memcached/authfile.c:44
SUMMARY: AddressSanitizer: heap-buffer-overflow
(/lib/x86_64-linux-gnu/libasan.so.5+0x53f9c)
Shadow bytes around the buggy address:
0x0c047fff7fc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c047fff7fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c047fff7fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c047fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c047fff8000: fa fa 00 04 fa fa 00 00 fa fa 00 00 fa fa 00 00
=>0x0c047fff8010: fa fa 00[06]fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff8020: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff8030: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff8040: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff8050: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff8060: 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
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
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
Shadow gap: cc
==1061115==ABORTING
I am looking forward to hearing from you in the earliest convenience.
Sincerely,
Mohammad Hosein Askari
--
---
You received this message because you are subscribed to the Google Groups
"memcached" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to memcached+unsubscr...@googlegroups.com.
To view this discussion on the web visit
https://groups.google.com/d/msgid/memcached/3af99054-6bd5-4ec7-adb9-e963cdb37c79n%40googlegroups.com.
\0\0\0:````\n
