CVE-2015-8727
medium
CVSS v3
5.5
CVSS v4 NEW
—
VIR risk
6.5
Description
The dissect_rsvp_common function in epan/dissectors/packet-rsvp.c in the RSVP dissector in Wireshark 1.12.x before 1.12.9 and 2.0.x before 2.0.1 does not properly maintain request-key data, which allows remote attackers to cause a denial of service (use-after-free 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 - addresses_equal 'dissect_rsvp_common' Use-After-Free
Source: https://code.google.com/p/google-security-research/issues/detail?id=645
The following crash due to a use-after-free condition can be observed in an ASAN build of Wireshark (current git master), by feeding a malformed file to tshark ("$ ./tshark -nVxr /path/to/file"):
Attached are three files which trigger the crash.
--- cut ---
==5117==ERROR: AddressSanitizer: heap-use-after-free on address 0x61b00001e3b2 at pc 0x000000499bad bp 0x7ffd2111f650 sp 0x7ffd2111ee00
READ of size 4 at 0x61b00001e3b2 thread T0
#0 0x499bac in memcmp llvm/projects/compiler-rt/lib/asan/../sanitizer_common/sanitizer_common_interceptors.inc:416
#1 0x37949bc in addresses_equal wireshark/epan/dissectors/./../address.h:140:26
#2 0x379389a in rsvp_equal wireshark/epan/dissectors/packet-rsvp.c:1886:13
#3 0x7f77e4ae95ef in g_hash_table_lookup (/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x385ef)
#4 0x3796e2d in dissect_rsvp_common wireshark/epan/dissectors/packet-rsvp.c:7531:37
#5 0x37930d4 in dissect_rsvp wireshark/epan/dissectors/packet-rsvp.c:7553:5
#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 0x29c5318 in ip_try_dissect wireshark/epan/dissectors/packet-ip.c:2001:7
#10 0x29d0521 in dissect_ip_v4 wireshark/epan/dissectors/packet-ip.c:2485:10
#11 0xaf3794 in call_dissector_through_handle wireshark/epan/packet.c:616:8
#12 0xae5692 in call_dissector_work wireshark/epan/packet.c:691:9
#13 0xae4e1d in dissector_try_uint_new wireshark/epan/packet.c:1148:9
#14 0xae5a38 in dissector_try_uint wireshark/epan/packet.c:1174:9
#15 0x24e0824 in dissect_ethertype wireshark/epan/dissectors/packet-ethertype.c:307:21
#16 0xaf3794 in call_dissector_through_handle wireshark/epan/packet.c:616:8
#17 0xae5692 in call_dissector_work wireshark/epan/packet.c:691:9
#18 0xaefb1b in call_dissector_only wireshark/epan/packet.c:2662:8
#19 0xae09f3 in call_dissector_with_data wireshark/epan/packet.c:2675:8
#20 0x24dc752 in dissect_eth_common wireshark/epan/dissectors/packet-eth.c:545:5
#21 0x24d499a in dissect_eth_maybefcs wireshark/epan/dissectors/packet-eth.c:828:5
#22 0xaf3794 in call_dissector_through_handle wireshark/epan/packet.c:616:8
#23 0xae5692 in call_dissector_work wireshark/epan/packet.c:691:9
#24 0xae4e1d in dissector_try_uint_new wireshark/epan/packet.c:1148:9
#25 0x25dca12 in dissect_frame wireshark/epan/dissectors/packet-frame.c:500:11
#26 0xaf3794 in call_dissector_through_handle wireshark/epan/packet.c:616:8
#27 0xae5692 in call_dissector_work wireshark/epan/packet.c:691:9
#28 0xaefb1b in call_dissector_only wireshark/epan/packet.c:2662:8
#29 0xae09f3 in call_dissector_with_data wireshark/epan/packet.c:2675:8
#30 0xadffde in dissect_record wireshark/epan/packet.c:501:3
#31 0xab6d0d in epan_dissect_run_with_taps wireshark/epan/epan.c:373:2
#32 0x53c91b in process_packet wireshark/tshark.c:3728:5
#33 0x535d90 in load_cap_file wireshark/tshark.c:3484:11
#34 0x52c1df in main wireshark/tshark.c:2197:13
0x61b00001e3b2 is located 50 bytes inside of 1500-byte region [0x61b00001e380,0x61b00001e95c)
freed by thread T0 here:
#0 0x4d7380 in realloc llvm/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:61
#1 0x7f77e4aff6ae in g_realloc (/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x4e6ae)
#2 0x9d71b7 in wtap_read_packet_bytes wireshark/wiretap/wtap.c:1419:2
#3 0x89ee21 in libpcap_read_packet wireshark/wiretap/libpcap.c:722:7
#4 0x8991f4 in libpcap_read wireshark/wiretap/libpcap.c:619:9
#5 0x9d64c2 in wtap_read wireshark/wiretap/wtap.c:1314:7
#6 0x535c1a in load_cap_file wireshark/tshark.c:3479:12
#7 0x52c1df in main wireshark/tshark.c:2197:13
previously allocated by thread T0 here:
#0 0x4d6ff8 in __interceptor_malloc llvm/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:40
#1 0x7f77e4aff610 in g_malloc (/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x4e610)
#2 0x83fff6 in wtap_open_offline wireshark/wiretap/file_access.c:1105:2
#3 0x53214d in cf_open wireshark/tshark.c:4195:9
#4 0x52bc7e in main wireshark/tshark.c:2188:9
SUMMARY: AddressSanitizer: heap-use-after-free llvm/projects/compiler-rt/lib/asan/../sanitizer_common/sanitizer_common_interceptors.inc:416 in memcmp
Shadow bytes around the buggy address:
0x0c367fffbc20: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c367fffbc30: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c367fffbc40: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c367fffbc50: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c367fffbc60: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x0c367fffbc70: fd fd fd fd fd fd[fd]fd fd fd fd fd fd fd fd fd
0x0c367fffbc80: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c367fffbc90: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c367fffbca0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c367fffbcb0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c367fffbcc0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
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
==5117==ABORTING
--- cut ---
The crash was reported at https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=11793. Attached are three files which trigger the crash.
Proof of Concept:
https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/39002.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-2015-45.html
- https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=11793
- https://code.wireshark.org/review/gitweb?p=wireshark.git%3Ba=commit%3Bh=56baca60271379cb97f6a4a6bf72eb526e8b52d0
- https://security.gentoo.org/glsa/201604-05
- https://security-tracker.debian.org/tracker/CVE-2015-8727
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.