Headline

CVE-2020-24265: [Bug]heap-buffer-overflow in tcpprep with MemcmpInterceptorCommon() · Issue #616 · appneta/tcpreplay

An issue was discovered in tcpreplay tcpprep v4.3.3. There is a heap buffer overflow vulnerability in MemcmpInterceptorCommon() that can make tcpprep crash and cause a denial of service.

4 years ago

CVE

Open in Source

#vulnerability #ubuntu #linux #dos

What’s the problem (or question)?
A heap buffer overflow with MemcmpInterceptorCommon() in the 4.3.3 version of tcpprep.

==74==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x602000000032 at pc 0x000000432f16 bp 0x7ffe3a489250 sp 0x7ffe3a4889f8
READ of size 3 at 0x602000000032 thread T0
    #0 0x432f15 in MemcmpInterceptorCommon(void*, int (*)(void const*, void const*, unsigned long), void const*, void const*, unsigned long) (/out/tcpreplay+0x432f15)
    #1 0x43346a in bcmp (/out/tcpreplay+0x43346a)
    #2 0x4e1513 in get_l2len /src/tcpreplay-4.3.3/src/common/get.c:186:13
    #3 0x4e1b2b in get_ipv4 /src/tcpreplay-4.3.3/src/common/get.c:267:14
    #4 0x4c8c99 in process_raw_packets /src/tcpreplay-4.3.3/src/tcpprep.c:370:41
    #5 0x4c8c99 in main /src/tcpreplay-4.3.3/src/tcpprep.c:147:23
    #6 0x7f97e73b883f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2083f)
    #7 0x41c348 in _start (/out/tcpreplay+0x41c348) //I just rename tcpprep to tcpreplay//

0x602000000032 is located 0 bytes to the right of 2-byte region [0x602000000030,0x602000000032)
allocated by thread T0 here:
    #0 0x49619d in malloc (/out/tcpreplay+0x49619d)
    #1 0x7f97e84e24fe  (/usr/lib/x86_64-linux-gnu/libpcap.so.0.8+0x1f4fe)

SUMMARY: AddressSanitizer: heap-buffer-overflow (/out/tcpreplay+0x432f15) in MemcmpInterceptorCommon(void*, int (*)(void const*, void const*, unsigned long), void const*, void const*, unsigned long)
Shadow bytes around the buggy address:
  0x0c047fff7fb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  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 03 fa fa[02]fa fa fa fa fa fa fa fa fa
  0x0c047fff8010: fa fa fa fa 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
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
==74==ABORTING

Steps to reproduce the behavior:

download tcpreplay-4.3.3.tar.gz
apt-get -y install libpcap-dev
cd tcpreplay-3.4.4 && ./congfigure && make && make install
tcpprep -a client -i [poc filename] -o a.cach

poc_tcpprep_heap_buffer_overflow_MemcmpInterceptorCommon.tar.gz

Expected behavior
Get an a.cach at the path or exit when meet abnormal input.

System :

Tcpreplay Version 4.3.3 tcpprep -V

Copyright 2013-2018 by Fred Klassen <tcpreplay at appneta dot com> - AppNeta Copyright 2000-2012 by Aaron Turner <aturner at synfin dot net> The entire Tcpreplay Suite is licensed under the GPLv3 Cache file supported: 04 Not compiled with libdnet. Compiled against libpcap: 1.7.4 64 bit packet counters: enabled Verbose printing via tcpdump: disabled