CVE-2015-8731
medium
CVSS v3
5.5
CVSS v4 NEW
—
VIR risk
6.5
Description
The dissct_rsl_ipaccess_msg function in epan/dissectors/packet-rsl.c in the RSL dissector in Wireshark 1.12.x before 1.12.9 and 2.0.x before 2.0.1 does not reject unknown TLV types, which allows remote attackers to cause a denial of service (out-of-bounds read 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 - dissct_rsl_ipaccess_msg Static Out-of-Bounds Read
Source: https://code.google.com/p/google-security-research/issues/detail?id=660
The following crash due to a static out-of-bounds read 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 ---
==7557==ERROR: AddressSanitizer: global-buffer-overflow on address 0x7ff755ab5a18 at pc 0x7ff74b48f257 bp 0x7ffc467efe50 sp 0x7ffc467efe48
READ of size 4 at 0x7ff755ab5a18 thread T0
#0 0x7ff74b48f256 in dissct_rsl_ipaccess_msg wireshark/epan/dissectors/packet-rsl.c:3055:23
#1 0x7ff74b48a788 in dissct_rsl_msg wireshark/epan/dissectors/packet-rsl.c:3181:18
#2 0x7ff74b4951cb in dissect_rsl_ie_err_msg wireshark/epan/dissectors/packet-rsl.c:2206:14
#3 0x7ff74b48bf1b in dissct_rsl_msg wireshark/epan/dissectors/packet-rsl.c:3383:22
#4 0x7ff74b48a477 in dissect_rsl wireshark/epan/dissectors/packet-rsl.c:3847:14
#5 0x7ff7499e6cc1 in call_dissector_through_handle wireshark/epan/packet.c:616:8
#6 0x7ff7499d95ea in call_dissector_work wireshark/epan/packet.c:691:9
#7 0x7ff7499e32be in call_dissector_only wireshark/epan/packet.c:2662:8
#8 0x7ff7499d4ccf in call_dissector_with_data wireshark/epan/packet.c:2675:8
#9 0x7ff7499e3344 in call_dissector wireshark/epan/packet.c:2692:9
#10 0x7ff74a88a7ee in dissect_ipa wireshark/epan/dissectors/packet-gsm_ipa.c:365:5
#11 0x7ff74a889dab in dissect_ipa_tcp wireshark/epan/dissectors/packet-gsm_ipa.c:376:2
#12 0x7ff7499e6cc1 in call_dissector_through_handle wireshark/epan/packet.c:616:8
#13 0x7ff7499d95ea in call_dissector_work wireshark/epan/packet.c:691:9
#14 0x7ff7499d8dbd in dissector_try_uint_new wireshark/epan/packet.c:1148:9
#15 0x7ff74b98a9dd in decode_tcp_ports wireshark/epan/dissectors/packet-tcp.c:4615:9
#16 0x7ff74b990043 in process_tcp_payload wireshark/epan/dissectors/packet-tcp.c:4668:13
#17 0x7ff74b98b39c in dissect_tcp_payload wireshark/epan/dissectors/packet-tcp.c:4743:9
#18 0x7ff74b9a07a3 in dissect_tcp wireshark/epan/dissectors/packet-tcp.c:5575:13
#19 0x7ff7499e6cc1 in call_dissector_through_handle wireshark/epan/packet.c:616:8
#20 0x7ff7499d95ea in call_dissector_work wireshark/epan/packet.c:691:9
#21 0x7ff7499d8dbd in dissector_try_uint_new wireshark/epan/packet.c:1148:9
#22 0x7ff74aae688b in ip_try_dissect wireshark/epan/dissectors/packet-ip.c:2001:7
#23 0x7ff74aaf12b9 in dissect_ip_v4 wireshark/epan/dissectors/packet-ip.c:2485:10
#24 0x7ff7499e6cc1 in call_dissector_through_handle wireshark/epan/packet.c:616:8
#25 0x7ff7499d95ea in call_dissector_work wireshark/epan/packet.c:691:9
#26 0x7ff7499d8dbd in dissector_try_uint_new wireshark/epan/packet.c:1148:9
#27 0x7ff7499d9964 in dissector_try_uint wireshark/epan/packet.c:1174:9
#28 0x7ff74a5f848d in dissect_ethertype wireshark/epan/dissectors/packet-ethertype.c:307:21
#29 0x7ff7499e6cc1 in call_dissector_through_handle wireshark/epan/packet.c:616:8
#30 0x7ff7499d95ea in call_dissector_work wireshark/epan/packet.c:691:9
#31 0x7ff7499e32be in call_dissector_only wireshark/epan/packet.c:2662:8
#32 0x7ff7499d4ccf in call_dissector_with_data wireshark/epan/packet.c:2675:8
#33 0x7ff74a5f4725 in dissect_eth_common wireshark/epan/dissectors/packet-eth.c:545:5
#34 0x7ff74a5ecf33 in dissect_eth_maybefcs wireshark/epan/dissectors/packet-eth.c:828:5
#35 0x7ff7499e6cc1 in call_dissector_through_handle wireshark/epan/packet.c:616:8
#36 0x7ff7499d95ea in call_dissector_work wireshark/epan/packet.c:691:9
#37 0x7ff7499d8dbd in dissector_try_uint_new wireshark/epan/packet.c:1148:9
#38 0x7ff74a6e85f6 in dissect_frame wireshark/epan/dissectors/packet-frame.c:500:11
#39 0x7ff7499e6cc1 in call_dissector_through_handle wireshark/epan/packet.c:616:8
#40 0x7ff7499d95ea in call_dissector_work wireshark/epan/packet.c:691:9
#41 0x7ff7499e32be in call_dissector_only wireshark/epan/packet.c:2662:8
#42 0x7ff7499d4ccf in call_dissector_with_data wireshark/epan/packet.c:2675:8
#43 0x7ff7499d433b in dissect_record wireshark/epan/packet.c:501:3
#44 0x7ff7499823c9 in epan_dissect_run_with_taps wireshark/epan/epan.c:373:2
#45 0x5264eb in process_packet wireshark/tshark.c:3728:5
#46 0x51f960 in load_cap_file wireshark/tshark.c:3484:11
#47 0x515daf in main wireshark/tshark.c:2197:13
0x7ff755ab5a18 is located 0 bytes to the right of global variable 'rsl_att_tlvdef' defined in 'packet-rsl.c:685:30' (0x7ff755ab5220) of size 2040
SUMMARY: AddressSanitizer: global-buffer-overflow wireshark/epan/dissectors/packet-rsl.c:3055:23 in dissct_rsl_ipaccess_msg
Shadow bytes around the buggy address:
0x0fff6ab4eaf0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fff6ab4eb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fff6ab4eb10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fff6ab4eb20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fff6ab4eb30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0fff6ab4eb40: 00 00 00[f9]f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
0x0fff6ab4eb50: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
0x0fff6ab4eb60: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
0x0fff6ab4eb70: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
0x0fff6ab4eb80: 04 f9 f9 f9 f9 f9 f9 f9 00 f9 f9 f9 f9 f9 f9 f9
0x0fff6ab4eb90: 00 f9 f9 f9 f9 f9 f9 f9 00 f9 f9 f9 f9 f9 f9 f9
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
==7557==ABORTING
--- cut ---
The crash was reported at https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=11829. Attached are three files which trigger the crash.
Proof of Concept:
https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/38996.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-3516
- 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-2015-49.html
- https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=11829
- https://code.wireshark.org/review/gitweb?p=wireshark.git%3Ba=commit%3Bh=2930d3105c3ff2bfb1278b34ad10e2e71c3b8fb0
- https://security.gentoo.org/glsa/201604-05
- https://security-tracker.debian.org/tracker/CVE-2015-8731
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.