CVE-2015-8728
medium
CVSS v3
5.5
CVSS v4 NEW
—
VIR risk
6.5
Description
The Mobile Identity parser in (1) epan/dissectors/packet-ansi_a.c in the ANSI A dissector and (2) epan/dissectors/packet-gsm_a_common.c in the GSM A dissector in Wireshark 1.12.x before 1.12.9 and 2.0.x before 2.0.1 improperly uses the tvb_bcd_dig_to_wmem_packet_str function, which allows remote attackers to cause a denial of service (buffer overflow and application crash) via a crafted packet.
Predictions
Exploit likelihood
55%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Exploits
Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.
Exploit-DB
Wireshark - my_dgt_tbcd_unpack Static Buffer Overflow
Source: https://code.google.com/p/google-security-research/issues/detail?id=649
The following crash due to a static buffer overflow can be observed in an ASAN build of Wireshark (current git master), by feeding a malformed file to tshark ("$ ./tshark -nVxr /path/to/file"):
--- cut ---
==8089==ERROR: AddressSanitizer: global-buffer-overflow on address 0x00000df60580 at pc 0x000000d6eb8c bp 0x7ffc622f4a80 sp 0x7ffc622f4a78
WRITE of size 1 at 0x00000df60580 thread T0
#0 0xd6eb8b in my_dgt_tbcd_unpack wireshark/epan/dissectors/packet-gsm_a_common.c:1972:16
#1 0xd71258 in de_mid wireshark/epan/dissectors/packet-gsm_a_common.c:2270:9
#2 0x3c7ce02 in dissect_uma_IE wireshark/epan/dissectors/packet-uma.c:912:3
#3 0x3c7bfd1 in dissect_uma wireshark/epan/dissectors/packet-uma.c:1664:13
#4 0x1317640 in tcp_dissect_pdus wireshark/epan/dissectors/packet-tcp.c:2740:13
#5 0x3c7b62b in dissect_uma_tcp wireshark/epan/dissectors/packet-uma.c:1699:2
#6 0xaf3794 in call_dissector_through_handle wireshark/epan/packet.c:616:8
#7 0xae5692 in call_dissector_work wireshark/epan/packet.c:691:9
#8 0xae4e1d in dissector_try_uint_new wireshark/epan/packet.c:1148:9
#9 0x1318ea7 in decode_tcp_ports wireshark/epan/dissectors/packet-tcp.c:4610:9
#10 0x131ea52 in process_tcp_payload wireshark/epan/dissectors/packet-tcp.c:4668:13
#11 0x1319ad8 in dissect_tcp_payload wireshark/epan/dissectors/packet-tcp.c:4743:9
#12 0x132fb70 in dissect_tcp wireshark/epan/dissectors/packet-tcp.c:5575:13
#13 0xaf3794 in call_dissector_through_handle wireshark/epan/packet.c:616:8
#14 0xae5692 in call_dissector_work wireshark/epan/packet.c:691:9
#15 0xae4e1d in dissector_try_uint_new wireshark/epan/packet.c:1148:9
#16 0x29c5318 in ip_try_dissect wireshark/epan/dissectors/packet-ip.c:2001:7
#17 0x29d0521 in dissect_ip_v4 wireshark/epan/dissectors/packet-ip.c:2485:10
#18 0xaf3794 in call_dissector_through_handle wireshark/epan/packet.c:616:8
#19 0xae5692 in call_dissector_work wireshark/epan/packet.c:691:9
#20 0xae4e1d in dissector_try_uint_new wireshark/epan/packet.c:1148:9
#21 0xae5a38 in dissector_try_uint wireshark/epan/packet.c:1174:9
#22 0x24e0824 in dissect_ethertype wireshark/epan/dissectors/packet-ethertype.c:307:21
#23 0xaf3794 in call_dissector_through_handle wireshark/epan/packet.c:616:8
#24 0xae5692 in call_dissector_work wireshark/epan/packet.c:691:9
#25 0xaefb1b in call_dissector_only wireshark/epan/packet.c:2662:8
#26 0xae09f3 in call_dissector_with_data wireshark/epan/packet.c:2675:8
#27 0x24dc752 in dissect_eth_common wireshark/epan/dissectors/packet-eth.c:545:5
#28 0x24d499a in dissect_eth_maybefcs wireshark/epan/dissectors/packet-eth.c:828:5
#29 0xaf3794 in call_dissector_through_handle wireshark/epan/packet.c:616:8
#30 0xae5692 in call_dissector_work wireshark/epan/packet.c:691:9
#31 0xae4e1d in dissector_try_uint_new wireshark/epan/packet.c:1148:9
#32 0x25dca12 in dissect_frame wireshark/epan/dissectors/packet-frame.c:500:11
#33 0xaf3794 in call_dissector_through_handle wireshark/epan/packet.c:616:8
#34 0xae5692 in call_dissector_work wireshark/epan/packet.c:691:9
#35 0xaefb1b in call_dissector_only wireshark/epan/packet.c:2662:8
#36 0xae09f3 in call_dissector_with_data wireshark/epan/packet.c:2675:8
#37 0xadffde in dissect_record wireshark/epan/packet.c:501:3
#38 0xab6d0d in epan_dissect_run_with_taps wireshark/epan/epan.c:373:2
#39 0x53c91b in process_packet wireshark/tshark.c:3728:5
#40 0x535d90 in load_cap_file wireshark/tshark.c:3484:11
#41 0x52c1df in main wireshark/tshark.c:2197:13
0x00000df60580 is located 0 bytes to the right of global variable 'a_bigbuf' defined in 'packet-gsm_a_common.c:762:13' (0xdf60180) of size 1024
SUMMARY: AddressSanitizer: global-buffer-overflow wireshark/epan/dissectors/packet-gsm_a_common.c:1972:16 in my_dgt_tbcd_unpack
Shadow bytes around the buggy address:
0x000081be4060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000081be4070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000081be4080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000081be4090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000081be40a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x000081be40b0:[f9]f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
0x000081be40c0: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
0x000081be40d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000081be40e0: 00 00 00 00 f9 f9 f9 f9 00 00 00 00 00 00 00 00
0x000081be40f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000081be4100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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
==8089==ABORTING
--- cut ---
The crash was reported at https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=11797. Attached are three files which trigger the crash.
Proof of Concept:
https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/39000.zipOS impact
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 2.0.1+g59ea380-1 |
| sid | Fixed | 2.0.1+g59ea380-1 |
| forky | Fixed | 2.0.1+g59ea380-1 |
| bullseye | Fixed | 2.0.1+g59ea380-1 |
| bookworm | Fixed | 2.0.1+g59ea380-1 |
References
- http://www.debian.org/security/2016/dsa-3505
- http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html
- http://www.securityfocus.com/bid/79382
- http://www.securitytracker.com/id/1034551
- http://www.wireshark.org/security/wnpa-sec-2015-46.html
- https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=11797
- https://code.wireshark.org/review/gitweb?p=wireshark.git%3Ba=commit%3Bh=15edc8d714b11dcff3a04e5d00b8db9adfdb81ed
- https://security.gentoo.org/glsa/201604-05
- https://security-tracker.debian.org/tracker/CVE-2015-8728
CWEs
CWE-20
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.