Bug ID |
12577
|
Summary |
Divide-by-zero error in dissect_pbb_tlvblock()
|
Product |
Wireshark
|
Version |
2.0.4
|
Hardware |
x86-64
|
OS |
All
|
Status |
UNCONFIRMED
|
Severity |
Minor
|
Priority |
Low
|
Component |
Dissection engine (libwireshark)
|
Assignee |
bugzilla-admin@wireshark.org
|
Reporter |
c.benedict@prometheuscomputing.com
|
Created attachment 14696 [details]
Sample generated by AFL
Build Information:
TShark 1.12.9 (v1.12.9-0-gfadb421 from (HEAD)
Copyright 1998-2015 Gerald Combs <gerald@wireshark.org> and contributors.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Compiled (64-bit) with GLib 2.48.1, with libpcap, with libz 1.2.8, with POSIX
capabilities (Linux), with libnl 3, without SMI, with c-ares 1.11.0, without
Lua, without Python, with GnuTLS 3.4.13, with Gcrypt 1.7.1, with MIT Kerberos,
with GeoIP.
Running on Linux 4.6.2-1-ARCH, with locale en_US.utf8, with libpcap version
1.7.4, with libz 1.2.8.
Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz
--
This issue was uncovered with AFL (http://lcamtuf.coredump.cx/afl/)
The attached sample evokes a divide-by-zero error in the dissect_pbb_tlvblock()
function at packet-packetbb.c:289.
The variable of interest seems to be 'c' which is set at packet-packetbb.c:285
using two other variables and an addition. When c is zero, the _expression_
"length/c" at packet-packetbb.c:289 results in a divide-by-zero error.
Divide-by-zero has been observed when sample is parsed by tshark versions
1.12.8, 1.12.9, 1.12.10, 1.12.12, and 2.0.4 among others.
Credit goes to Chris Benedict, Aurelien Delaitre, NIST SAMATE Project,
https://samate.nist.gov
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