Divide-by-zero Error in TShark

vendor:

TShark

by:

Chris Benedict, Aurelien Delaitre, NIST SAMATE Project

7,5

CVSS

HIGH

Divide-by-zero Error

369

CWE

Product Name: TShark

Affected Version From: 1.12.8

Affected Version To: 2.0.4

Patch Exists: YES

Related CWE: N/A

CPE: a:wireshark:tshark

Metasploit: N/A

Other Scripts: N/A

Tags: N/A

CVSS Metrics: N/A

Nuclei References: N/A

Nuclei Metadata: N/A

Platforms Tested: Linux

2015

Divide-by-zero Error in TShark

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.

Mitigation:

Upgrade to the latest version of TShark

Source

Exploit-DB raw data:

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


Proof of Concept:
https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/40197.zip